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THE
MINISTRY OF HEALTH OF VIETNAM
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|
THE
SOCIALIST REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
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|
No.
52/2024/TT-BYT
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Hanoi,
December 31, 2024
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CIRCULAR
ON
NATIONAL TECHNICAL REGULATION ON AND INSPECTION, SUPERVISION OF DOMESTIC WATER
QUALITY
Pursuant to Point b Clause 3
Article 43 of the Law on Water Resources dated November 27, 2023;
Pursuant to the Law on Technical
Regulations and Standards dated June 29, 2006;
Pursuant to Decree No.
117/2007/ND-CP dated July 11, 2007 of the Government on production, supply, and
consumption of clean water; Decree No. 124/2011/ND-CP dated December 28, 2011
of the Government on amendment to Decree No. 117/2007/ND-CP;
Pursuant to Decree No.
95/2022/ND-CP dated November 15, 2022 of the Government on functions, tasks,
powers, and organizational structures of Ministry of Health;
At request of Director of Health
Environment Management Agency;
The Minister of Health
promulgates Circular on National Technical Regulation on and inspection,
supervision of domestic water quality.
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This Circular prescribes:
1. National
Technical Regulation on domestic water quality.
2. Internal control, external
control, inspection and supervision of domestic water quality (hereinafter referred
to as “clean water”).
Article 2. Definitions
In this Circular, the terms below
are construed as follows:
1. Water supplier (hereinafter
referred to as “supplier”) means an organization or an individual producing,
delivering, selling wholesale, retailing clean water by utilizing complete
centralized water supply system.
2. Water consumer (hereinafter
referred to as “consumer”) means an agency, entity, enterprise, apartment
building, residential area, hospital, school, hotel, restaurant, or resort outfitted
with tanks to contain clean water supplied by a supplier.
3. Internal control means
the process of sampling and testing water quality carried out by supplier and
consumer.
4. External control means
the process of sampling and testing water quality carried out by health agency
designated by competent authority. External control can be separate from or
carried out in tandem with inspection and supervision of water quality.
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Article 3. Promulgation of
National Technical Regulation on Water Quality
The National Technical Regulation
on Domestic Water Quality (hereinafter referred to as “the National Technical
Regulation”) is attached hereto.
Article 4. Regulations on
internal control
1. The supplier shall perform
internal control as follows:
a) Test frequency and parameters in
provinces and cities of which local governments have promulgated technical
regulations on domestic water quality (hereinafter referred to as “local
technical regulations”):
- All water parameters under
Article 4 of the National Technical Regulation attached hereto shall be tested
every 3 years and: Prior to initial operation; immediately after upgrade or
major repair that affects production system; in the event of environmental
emergencies that potentially affect water quality; where factors in production
process potentially affect water quality; at request of competent authority.
Where test results satisfactory in accordance with Article 4 of the National
Technical Regulation hereunder are produced in 2 consecutive periodic tests,
test frequency may be reduced to once every 5 years until unsatisfactory test
results are produced;
- Test frequency for all group A
parameters: at least once every month;
- Test frequency for all group B
parameters: Compliant with local technical regulations and at least once every
6 months. Where test results satisfactory to local technical regulations are
produced in 2 consecutive periodic tests, test frequency may be reduced to once
every year. Supplier may adopt test frequency of once every year until
unsatisfactory results are produced;
- Depending on local conditions,
provincial People’s Committees may require tests to be conducted more
frequently than the aforementioned test frequency.
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- All water parameters under
Article 4 of the National Technical Regulations attached hereto shall be
tested: Prior to initial operation; immediately after upgrade or major repair
that affects production system; in the event of environmental emergencies that
potentially affect water quality; where factors in production process
potentially affect water quality; at request of competent authority.
- Test frequency for all group A
parameters: at least once every month;
- Test frequency for all group B
parameters: Compliant with National Technical Regulation and at least once
every 6 months. Where test results satisfactory to the National Technical
Regulation attached hereto are produced in 2 consecutive tests, test frequency
can be reduced to once every year. Supplier may adopt test frequency of once
every year until unsatisfactory results are produced;
- Depending on local conditions,
provincial People’s Committees may require tests to be conducted more
frequently than the aforementioned test frequency.
c) Sample quantity and sampling
location:
- In respect of a supplier with
design capacity below 1.000 m3/24 hours or supplying water for less
than 6.500 people: Collect at least 1 sample from a tank of the supplier
containing treated water before entering water supply network and 1 sample at
random from a faucet at the end of the water supply network;
- In respect of a supplier with
design capacity of 1.000 m3/24 hours or higher or supplying water
for 6.500 people to less than 100.000 people: Collect at least 1 sample from a
tank of the supplier containing treated water before entering water supply
network and 2 samples at random from faucets at the end of the water supply network;
- In respect of a supplier with
design capacity of 1.000 m3/24 hours or higher or supplying water for 6.500
people to less than 100.000 people: Collect at least 1 sample from a tank of
the supplier containing treated water before entering water supply network and
2 samples at random from faucets at the end of the water supply network;
- In respect of a supplier with
design capacity of 30.000 m3/24 hours or higher or supplying water
for 200.000 people or higher: Collect at least 1 sample from a tank of the
supplier containing treated water before entering water supply network and 1
sample at random from a faucet at the end of the water supply network for each
addition 15.000 m3 or each additional 100.00 people;
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d) Internal control results of
water quality shall be made public by suppliers on their website within 3
working days from the date on which internal control results are produced.
Suppliers that do not have a website must publicly post results at the entrance
of their headquarters within 20 days from the date on which internal control
results are produced;
dd) Within 24 hours from the moment
in which microbiological parameters unsatisfactory to local technical
regulations or Nation Technical Regulation attached hereto in case provincial
People’s Committees have not promulgated local technical regulations, suppliers
must examine, identify causes, adopt rectifying measures, collect samples and
redo tests of unsatisfactory microbiological tests. Sample quantity and
sampling location: 1 sample is collected from a tank of the supplier containing
treated water before entering water supply network and 1 sample is collected at
random at a faucet.
Where test results are still
unsatisfactory after adopting rectifying measures, suppliers must immediately
report to presiding authorities, water supply authorities in order to take
actions and promptly supply clean water and report to competent health agencies
for monitoring;
e) Where test results of sensory,
chemical, radioactive exposure parameters are unsatisfactory to local technical
regulations or Nation Technical Regulation attached hereto in case provincial
People’s Committees have not promulgated local technical regulations, suppliers
must examine, determine causes, adopt rectifying measures, collect samples, and
redo tests of unsatisfactory parameters. Sample quantity and sampling location:
1 sample is collected from a tank of the supplier containing treated water
before entering water supply network and 1 sample is collected at random at a
faucet.
- Where test results are
satisfactory after adopting rectifying measures, samples shall be collected and
re-evaluated for previously unsatisfactory parameters at least once every month
for 3 consecutive months as follows: 1 sample is collected from a tank of the
supplier containing treated water before entering water supply network and 1
sample is collected at random at a faucet;
- Where test results are still
unsatisfactory after adopting rectifying measures, suppliers must immediately
report to presiding authorities, water supply authorities in order to take
actions and promptly supply clean water and report to competent health agencies
for monitoring.
2. Consumers shall organize
internal control as follows:
a) Test frequency and parameters:
- Periodic tests shall be carried
out at least once every 6 months. Where there are suspicions regarding water
quality, tests must be conducted immediately. Depending on local conditions,
provincial People’s Committees may require tests to be conducted more
frequently than the aforementioned test frequency;
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b) Sample quantity and sampling
location: At least 1 sample is collected from a centralized tank and 1 sample
is collected at random at a faucet. Where there are at least 2 clean water
tanks, collect at least 1 sample from the tank and 1 sample at random at a
faucet for each clean water tank;
c) Internal control results
presented using Form No. 7 under Appendix attached hereto shall be uploaded by
suppliers on their websites within 3 working days from the date on which
internal control results are produced. Suppliers that do not have a website
must publicly post the results on their notice boards within 20 days from the
date on which internal control results are produced;
d) Where test results of parameters
produced by consumers are unsatisfactory to local technical regulations or
National Technical Regulation attached hereto in case provincial People’s
Committees have not promulgated local technical regulations, consumers must:
- Immediately inform suppliers to
cooperate in examining, identifying causes, adopting rectifying measures,
collecting samples, and redoing tests of unsatisfactory parameters within 24
hours from the moment in which unsatisfactory results are produced. Sample
quantity and sampling location: 1 sample after a water meter of the consumer, 1
sample at clean water tank, and 1 sample at faucet connected to clean water
tank from which unsatisfactory test results are produced;
- Where test results are still
unsatisfactory after adopting rectifying measures, whether supplier or consumer
is responsible must be determined. Presiding authorities and water supply
authorities must be informed in order to take rectifying measures, supply clean
water; competent health authorities must be informed in order to monitor.
Article 5. Regulations on
external control, internal control, and quality supervision
1. In respect of suppliers:
a) Examine compliance of internal
control and sampling for tests of all parameters with local technical
regulations or Nation Technical Regulation attached hereto in case provincial
People’s Committees have not promulgated local technical regulations; examine
water quality logbook under Point c Clause 7 Article 6 hereof;
c) Quantity and sampling location
for external control of water parameters are compliant with Point c Clause 1
Article 4 hereof;
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- Each supplier must undergo
periodic external control at least once every year;
- Irregular external control shall
be carried out: In case of suspicions pertaining to water quality according to
periodic or irregular water quality reports of suppliers; in case of
environmental emergencies that may affect water quality; in case of unqualified
water quality inspection or epidemiology survey results; in case agencies,
organizations, or individuals complain about water quality; at request of
competent authorities.
d) Within 5 working days from the
date on which external control results are produced, entities conducting
external control shall inform suppliers subject to external control in writing;
publicly post on their website; inform superior agencies and presiding agencies
of suppliers subject to external control (if any) about external control
results;
dd) Where water quality external
control results are unsatisfactory to local technical regulations or National
Technical Regulation attached hereto in case provincial People’s Committees
have not promulgated local technical regulations, entities conducting external
control must immediately report to superiors and inform suppliers subject to
external control in order to comply with Point dd and Point e Clause 1 Article
4 hereof.
2. In respect of consumers:
a) Conduct external control,
inspection, and supervision:
- In case of environmental
emergencies that affect water quality;
- In case agencies, organizations,
individuals complain about water quality;
- At request of competent
authorities.
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c) Where water quality external
control results are unsatisfactory to local technical regulations or National
Technical Regulation attached hereto in case provincial People’s Committees
have not promulgated local technical regulations, entities conducting external
control must immediately report to superiors and inform suppliers subject to
external control in order to comply with Point d Clause 2 Article 4 hereof.
3. In respect of entities and
households producing water for self-consumption.
a) Conduct external control,
inspection, and supervision:
- In case production takes place in
areas prone to pollution defined by provincial People’s Committees;
- At request of competent
authorities; In case of environmental emergencies that may affect water
quality; in case organizations, individuals complain about water quality.
b) Water quality test parameters
are compliant with Point a Clause 2 Article 4 hereof or depending on pollution
risks or at request of competent authorities;
c) Sample quantity and sampling
location: 1 sample is collected at faucet or water tank or directly at
production areas;
d) Where water quality external
control results are unsatisfactory to local technical regulations or National
Technical Regulation attached hereto in case provincial People’s Committees
have not promulgated local technical regulations, entities conducting external
control must immediately report to superiors, local governments, inform
entities and households subject to external control, and cooperate in identifying
causes.
4. Record of external control,
inspection, and supervision of water quality shall use Form No. 1 of Appendix
attached hereto.
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1. Health Environment Management
Agency - Ministry of Health is responsible for popularizing, guiding,
examining, and reporting implementation of this Circular on a nationwide scale.
2. Provincial People’s Committees
have the responsibility to:
a) coordinate, provide guidelines,
and inspect implementation of this Circular in their provinces and cities;
b) promulgate local technical
regulations on the basis of National Technical Regulation hereunder on the
basis of:
- Group A parameters: Mandatory
parameters;
- Group B parameters: Parameters
appropriate to practical local conditions;
- Limit values of parameters must
not exceed the permissible limits with the exception of pH and Chlorine which
must be within permissible range under Article 4 of the National Technical
Regulation hereunder.
c) identify water production areas
at risks in their provinces and cities;
d) allocate budget and coordinate
periodic, irregular external control, inspection, supervision of water quality;
invest and upgrade laboratory equipment in order to adequately carry out tests
of water quality parameters in accordance with this Circular;
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3. Professional institutes
affiliated to the Ministry of Health have the responsibility to:
a) consolidate, analyze, and produce
reports on water quality of provinces and cities; develop plans for training,
professional training, technical training for local governments in
implementation of regulations;
b) develop expenditure plans and
estimates and request competent authority to approve and carry out periodic
inspection, supervision of water quality in their jurisdiction;
c) collect sample and carry out
tests for water quality, inspection and evaluate causes at request of Ministry
of Health;
d) provide technical support for provinces
and cities in developing local technical regulations on water quality;
dd) carry out inspection and
supervision of water quality within their jurisdiction;
e) submit reports using Form No. 2
of Appendix attached hereto every 6 months and every year to Health Environment
Management Agency within 30 days from the last day of June and December.
4. Departments of Health of
provinces and central-affiliated cities have the responsibility to:
a) take charge and cooperate with
relevant entities in popularizing, implementing, guiding, inspecting, and
monitoring implementation of this Circular within their jurisdiction;
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c) develop plans, prepare personnel
and equipment, request provincial People's Committees to allocate funding (from
annual budget) for inspection, supervision, and external control of water quality
in their jurisdiction;
d) request affiliated entities to
conduct inspection, supervision, and external control of water quality in
accordance with this Circular in their jurisdiction and submit reports to
provincial People’s Committees;
dd) coordinate inspection,
supervision, and external control of water quality for water produced and
self-consumed by entities and households located in areas prone to pollution
risks in their jurisdiction;
e) carry out inspection and
examination for water quality assurance implemented by local suppliers.
5. Provincial Centers for Disease
Control (CDCs) shall have the responsibility to:
a) develop and propose annual
expenditure plans and estimate to Departments of Health in order to implement
external control, inspection, and supervision of water quality;
b) implement periodic, irregular
inspection, supervision, and external control of water quality in all suppliers
with minimum capacity of 1.000 m3/24 hours in their jurisdiction in
accordance with Article 5 hereof;
c) coordinate and cooperate with
district-level medical centers in conducting periodic, irregular inspection,
supervision, and external control of water quality in all suppliers with
capacity below 1.000 m3/24 hours;
d) coordinate and cooperate with district-level
medical centers in conducting inspection, supervision, and external control of
water quality of consumers; entities and households that engage in water
production and self-consumption;
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6. District-level medical centers
shall have the responsibility to:
a) develop and propose annual
expenditure plans and estimate for external control, inspection, and
supervision of water quality to competent authorities;
b) implement periodic, irregular
inspection, supervision, and external control of water quality in all suppliers
with capacity below 1.000 m3/24 hours in their jurisdiction in
accordance with Article 5 hereof;
c) carry out inspection,
supervision and cooperate with provincial CDCs in conducting external control
of water quality of consumers in accordance with Point a Clause 2 Article 5
hereof; entities and households that engage in water production and
self-consumption in accordance with Point a Clause 3 Article 5 hereof;
d) submit reports using Form No. 4
of Appendix attached hereto every quarter, every 6 months, and every year to
superior authority within 10 days from the final day of March, June, September,
and December.
7. Suppliers shall have the responsibility
to:
a) comply with this Circular;
b) declare water quality conformity
in accordance with Circular No. 28/2012/TT-BKHCN dated December 12, 2012 of the
Minister of Science and Technology and Circular No. 02/2017/TT-BKHCN dated
March 31, 2017 of the Minister of Science and Technology and assume legal
responsibility for water quality of suppliers;
c) store and manage water quality
logbook:
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- Dossiers on chemicals used in
clean water production;
- Rectification results for
incidents related to water quality;
- Proof of publicly posted water
quality.
d) operate under inspection,
supervision of competent authorities;
dd) propose water quality
parameters and corresponding limit values in order to develop local technical
regulations on water quality;
e) ensure continuous supply of
water with quality compliant with technical regulations in case of water
emergencies (if any);
g) submit reports on quarterly and
annual water quality test results using Form No. 6 of Appendix attached hereto
to district-level medical centers in respect of suppliers with capacity below
1.000 m3/24 hours, provincial CDCs in respect of suppliers with
minimum capacity more than 1.000 m3/24 hours within 5 working days
from the final days of March, June, September, and December. Report all
unsatisfactory parameter test results (if any).
8. Consumers shall have
responsibility to:
a) regularly examine and maintain
hygiene of clean water tanks, intermediate water tanks, and clean water system;
comply with regulations on internal control of water quality under Clause 2
Article 4 and cooperate with relevant entities in conducting external control
of water quality in accordance with Clause 2 Article 5 hereof;
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c) submit reports on water quality
emergencies and rectifying solutions and results to superior agencies and
competent health authorities.
9. Entities and households
producing water for domestic use shall have responsibility to:
a) conform to regulations on safe
water use in accordance with recommendations of local governments;
b) inspect and maintain hygiene of
structures, equipment, and instruments for processing and storing clean water.
Adopt protective measures to protect water sources and storage system from
being polluted by domestic, agricultural, industrial, and craft village wastes;
c) promptly inform local government
about irregularities pertaining to water quality.
10. Where a supplier possesses
multiple water supply structures, internal control, external control,
supervision, and supervision of water quality shall be conducted for individual
water supply structures of the supplier in accordance with this Circular.
Article 7. Entry into force
1. This Circular comes into force
from July 01, 2025.
2. Circular No. 41/2018/TT-BYT
dated December 14, 2018 of the Minister of Health; Circular No. 26/2021/TT-BYT
dated December 15, 2021 of the Minister of Health expire from the effective
date hereof.
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Where documents referred to in this
Circular are superseded or amended, the newer versions will prevail.
Article 9. Transition clauses
1. Local governments of provinces
and central-affiliated cities must promulgate or amend, supersede local
technical regulations compliant with the National Technical Regulation under
this Circular by December 31, 2027 at the latest.
2. Where local technical
regulations have not been amended or superseded in accordance with Clause 1 of
this Article, local governments of provinces and central-affiliated cities that
have promulgated local technical regulations before the effective date hereof
may:
a) continue to adopt local
technical regulations promulgated before the effective date hereof; or
b) adopt the National Technical
Regulation attached hereto from the effective date hereof.
Article 10. Responsibility for
implementation
Chief of Ministry Office, Director
of Health Environment Management Agency, Director of Administration of Science
Technology and Training, Director of Department of Legal Affairs, Chief
Ministry Inspectorate, relevant departments and agencies, heads of entities
affiliated to Ministry of Health, directors of Departments of Health of
provinces and central-affiliated cities, and relevant organizations and
individuals shall be responsible for the implementation of this Circular.
Difficulties that arise during implementation
of this Circular must be reported to the Ministry of Health (via Health
Environment Management Agency) in writing./.
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PP.
MINISTER
DEPUTY MINISTER
Nguyen Thi Lien Huong
QCVN 01-1:2024/BYT
NATIONAL
TECHNICAL REGULATION ON DOMESTIC WATER QUALITY
Foreword
The National Technical Regulation
on domestic water quality QCVN 01-1:2024/BYT is compiled by Health Environment
Management Agency - Ministry of Health, appraised by Ministry of Science and
Technology, and promulgated by Ministry of Health under Circular No.
52/2024/TT-BYT dated December 31, 2024.
The QCVN 01-1:2024/BYT replaces the
QCVN 01-1:2018/BYT under Circular No. 41/2018/TT-BYT dated December 14, 2018
and Circular No. 26/2021/TT-BYT dated December 15, 2021.
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Chapter
I
GENERAL
PROVISIONS
Article 1. Scope
This National Technical Regulation
prescribes limit values of domestic water quality parameters.
Article 2. Regulated entities
1. This National Technical Regulation
applies to: Suppliers; consumers; entities and households producing water for
self-consumption; state authorities for inspection, examination, supervision of
water quality or health agencies assigned by state authorities to conduct
external control, inspection, supervision; laboratories and organizations
recognizing water quality parameters.
2. This National Technical
Regulation does not apply to water of drinking fountain, bottled mineral water,
and bottled drinking water for drinking, water from purifiers, filter system,
and water types not for domestic use.
Article 3. Definitions
In this document, the terms below
are construed as follows:
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2. Sensory parameters refer to odor
and taste perceptible to human senses.
3. CFU stands for “colony forming
unit”.
4. MPN stands for “most probable
number”.
5. NTU stands for “nephelometric
turbidity unit”.
6. SMEWW stands for Standard
Methods for the Examination of Water and Wastewater of the United States.
7. TCU stands for “true color
unit”.
8. US EPA stands for United States
Environmental Protection Agency.
Chapter
II
TECHNICAL
PROVISIONS
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No.
Entry
Unit
Permissible
limit
Group A parameters
a. Microbiological parameters
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Total Coliform
CFU/100
ML or MPN/100mL
<
1
2
Thermotolerant E.coli or
Coliform
CFU/100
ML or MPN/100mL
<
1
b. Sensory and chemical
parameters
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Color
TCU
15
4
Odor(*)
-
No
strange odor
5
pH(*)
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Between
6,0 - 8,5
6
Turbidity
NTU
2
7
Arsenic (As)
mg/L
0,01
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Free chlorine(*)
mg/L
Between
0,2 - 1,0
9
Permanganate
mg/L
2
10
Ammonia (NH3 and NH4+
by N)
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1
Group B parameters
a. Microbiological parameters
11
Pseudomonas aeruginosa
CFU/100mL
<
1
12
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CFU/100mL
<
1
b. Chemical parameters
13
Antimony (Sb)
mg/L
0,02
14
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mg/L
1,3
15
Bor in general for Borate and
boric acid (B)
mg/L
2,4
16
Cadmium (Cd)
mg/L
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17
Lead (Plumbum) (Pb)
mg/L
0,01
18
Chloride (Cl-)
mg/L
250
or 300(**)
19
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mg/L
0,05
20
Copper (Cuprum) (Cu)
mg/L
1
21
Hardness, by CaCO3
mg/L
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22
Fluoride (F-)
mg/L
1,5
23
Zinc (Zincum) (Zn)
mg/L
2
24
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mg/L
0,1
25
Sodium (Na)
mg/L
200
26
Aluminium (Al)
mg/L
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27
Nickel (Ni)
mg/L
0,07
28
Nitrate (NO3-
by N)
mg/L
11
29
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mg/L
0,9
30
Iron (Fe)
mg/L
0,3
31
Selenium (Se)
mg/L
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32
Sulfate (SO42-)
mg/L
250
33
Sulfide (S2-)
mg/L
0,05
34
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mg/L
0,001
35
Total dissolved solids (TDS)
mg/L
1.000
36
Cyanide (CN-)
mg/L
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Chloroalkanes
37
1,1,1 - Trichloroethane (C2H3CI3)
µg/L
2.000
38
1,2 - Dichloroethane (C2H4CI2)
µg/L
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39
1,2 - Dichloroethene (C2H2CI2)
µg/L
50
40
Carbon tetrachloride (CCI4)
µg/L
2
41
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µg/L
20
42
Tetrachloroethene (C2CI2)
µg/L
40
43
Trichloroethene (C2HCI3)
µg/L
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44
Vinyl chloride (C2H3CI)
µg/L
0,3
Aromatic hydrocarbons
45
Benzene (C6H6)
µg/L
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46
Ethylbenzene (C8H10)
µg/L
300
47
Pentachlorophenol (C6HCI5O)
µg/L
9
48
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µg/L
20
49
Toluene (C7H8)
µg/L
700
50
Xylene (C8H10)
µg/L
...
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Chlorobenzene
51
1,2 - Dichlorobenzene (C6H4CI3)
µg/L
1.000
52
Monochlorobenzene (C6H5CI)
µg/L
...
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53
Total Trichlorobenzene (C6H3CI3)
µg/L
20
Complex organic compounds
54
Acrylamide (C3H5NO)
µg/L
...
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...
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55
Epichlorohydrin (C3H5CIO)
µg/L
0,4
56
Hexachlorobutadiene (C4CI6)
µg/L
0,6
...
...
...
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57
1,2- Dibromo - 3 chloropropane (C3H5Br2CI)
µg/L
1
58
1,2 - Dichloropropane (C3H6CI2)
µg/L
40
59
...
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µg/L
20
60
2,4-D (C8H6CI2O3)
µg/L
30
61
2,4 - DB (C10H10CI2O3)
µg/L
...
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62
Alachlor (C14H20CINO2)
µg/L
20
63
Aldicarb (C7H14N2O2S)
µg/L
10
64
...
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µg/L
100
65
Carbofuran (C12H15NO3)
µg/L
5
66
Chlorpyrifos (C9H11CI3NO3PS)
µg/L
...
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67
Chlordane (C10H6CI8)
µg/L
0,2
68
Chlorotoluron (C10H13CIN2O)
µg/L
30
69
...
...
...
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µg/L
0,6
70
DDT (C14H9CI5)
and derivatives
µg/L
1
71
Dichlorprop (C9H8CI2O3)
µg/L
...
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...
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72
Fenoprop (C9H7CI3O3)
µg/L
9
73
Hydroxyatrazine (C8H15N5O)
µg/L
200
74
...
...
...
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µg/L
9
75
MCPA (C9H9CIO3)
µg/L
2
76
Mecoprop (C10H11CIO3)
µg/L
...
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...
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77
Methoxychlor (C16H15CI3O2)
µg/L
20
78
Molinate (C9H17NOS)
µg/L
6
79
...
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...
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µg/L
20
80
Permethrin (C21H20CI2O3)
µg/L
20
81
Propanil (C9H9CI2NO)
µg/L
...
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...
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82
Simazine (C7H12CIN5)
µg/L
2
83
Trifluralin (C13H16F3N3O4)
µg/L
20
...
...
...
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84
2,4,6 - Trichlorophenol (C6H2CI3OH)
µg/L
200
85
Bromat (BrO3-)
µg/L
10
86
...
...
...
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µg/L
500
87
Monochloramine (NH3CI)
µg/L
3.000
Trihalomethanes (THM)
...
...
...
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88
Bromodichloromethane (CHBrCl2)
µg/L
60
89
Bromoform (CHBr3)
µg/L
100
90
...
...
...
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µg/L
300
91
Dibromochloromethane (CHBr2CI)
µg/L
100
Halogenated acetonitrile
...
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92
Dibromoacetonitrile (C2HBr2N)
µg/L
70
93
Dichloroacetonitrile (C2HCI2N)
µg/L
20
94
...
...
...
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µg/L
1
Haloacetic acids (HAAs)
95
Acid monochloroacetic (C2H3CIO2)
µg/L
...
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...
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96
Acid dichloroacetic (C2H2CI2O2)
µg/L
50
97
Acid trichloroacetic (C2HCI3O2)
µg/L
200
...
...
...
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98
Total activity α
Bq/L
0,1
99
Total activity ꞵ
Bq/L
1,0
Note: (-) indicates the lack of
measurement unit
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(**) Only apply to
coastal areas, islands, or areas prone to saltwater intrusion.
Both Nitrite and Nitrate are
capable of creating methemoglobin. As a result, where they are both present
in water, total ratio between concentration of each substance and their
maximum limit must not be greater than 1 and determined using formula below:
Cnitrat/GHTDnitrat
+ Cnitrit/GHTDnitrit ≤ 1
Chapter
III
REGULATIONS
ON MANAGEMENT
Article 5. Sampling methods,
test methods
1. Sampling and test methods for
water quality parameters are specified under Appendix attached hereto.
2. In addition to methods detailed
under Clause 1 of this Article, results produced by automatic and continuous
monitoring devices for water quality satisfactory to technical performance
characteristics shall also be accepted.
Article 6. Requirements for
water quality test laboratories
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2. Measuring instruments used in
tests for water quality parameters (including those for on-site measurement)
must be inspected and calibrated in accordance with measurement laws. Technical
performance characteristics of measuring instruments must be maintained
throughout use during inspection interval.
Article 7. Declaration of
conformity
Conform to Circular No.
28/2012/TT-BKHCN dated December 12, 2012 of the Minister of Science and
Technology; Circular No. 02/2017/TT-BKHCN dated March 31, 2017 of the Minister
of Science and Technology.
Chapter
IV
ORGANIZING
IMPLEMENTATION
Article 8. Responsibilities for
organizing implementation
1. Health Environment Management Agency
shall take charge and cooperate with relevant state authorities in guiding
implementation, organizing implementation, and requesting Ministry of Health to
amend the National Technical Regulation. The Ministry of Health and Departments
of Health shall coordinate inspection and supervise compliance of water quality
test laboratories with this National Technical Regulation.
2. Suppliers; consumers; entities,
and households engaging in water production and self-consumption in Vietnamese
territory shall conform to this National Technical Regulation.
3. Water quality test laboratories
according to this National Technical Regulation shall operate under inspection,
supervision of the Ministry of Health and Departments of Health regarding
compliance with Article 6 hereof.
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APPENDIX
LIST
OF SAMPLING AND TEST METHODS
(Attached to QCVN 01-1:2024/BYT dated December 31, 2024 of the Minister of
Health)
No.
Parameters
Analysis
method, standard number
1
Sampling
- TCVN 6663-1:2011 (ISO
5667-1:2006), Water quality - Sampling - Part 1: Guidance on the design of
sampling programs and sampling techniques
...
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- TCVN 6663-5:2009 (ISO
5667-5:2006), Water quality - Sampling - Part 5: Guidance on sampling of
drinking water from treatment works and piped distribution systems
- TCVN 8880:2011 (ISO
19458:2006), Water quality - Sampling for microbiological analysis
2
Total Coliform, E.coli or
thermotolerant Coliform
- TCVN 6187-1:2019 (ISO
9308-1:2014): Water quality - Enumeration of Escherichia coli and
coliform bacteria - Part 1: Membrane filtration for waters with low
background flora
- Or SMEWW 9222B:2023 - Total
coliform membrane filter procedure using m- Endo media
- Or SMEWW 9222D:2023 -
Thermotolerant (Fecal) coliform membrane filter procedure.
- Or SMEWW 9222I:2023 - Partitioning
E. coli from MF Total conforms using NA-MUG agar
- TCVN 6187-2:2019 (ISO
9308-2:2012): Water quality - Enumeration of Escherichia coli and coliform
bacteria - Part 2: Most probable number method
...
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3
Staphylococcus aureus
- SMEWW 9213B:2023 -
Microbiological analysis of recreation waters-Swimming pools
4
Pseudomonas aeruginosa
- TCVN 8881:2011 (ISO
16266:2006): Water quality – Detection and enumeration of Pseudomonas
aeruginosa – Method by membrane filtration
- Or SMEWW 9213E:2023 -
Microbiological analysis of recreation waters - Membrane filter technique for
Pseudomonas aeruginos
5
Arsenic
...
...
...
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- Or SMEWW 3114B:2023: Arsenic
and Selenium by hydride generation atomic absorption spectrometry
- Or SMEWW 3120B:2023 - Metals by
Inductively Coupled Plasma (ICP)
6
Free chlorine, monochloramine
- TCVN 6225-2:2021 (ISO
7939-2:2017) - Water quality - Determination of free chlorine and total
chlorine
- Or SMEWW4500 - C1 B, C, G:2023
- Chlorine (residual) by Iodometric method I, method II or DPD Colorimetric
method
- SMEWW 4500-C1 G:2023 - Chlorine
(residual) by DPD colorimetric method
7
Turbidity
...
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...
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- Or SMEWW 2130:2023 - Turbidity
by Nephelometric method
8
Color
- TCVN 6185:2015 (ISO 7887:2011)
- Water quality - Examination and determination of colour
- Or SMEWW 2120B, C, D:2023 -
Color by Visual comparison method or Spectrophotometric-single-wavelength
method or Spectrophotometric-multi-wavelength method
9
Odor
- SMEWW 2150:2023 - Threshold
odor test
10
...
...
...
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- TCVN 6492 - 2011 (ISO
10523-2008) - Water quality - Determination of pH
- Or SMEWW 4500-H+-B:2023
- pH by Electrometric method
11
Ammonia (NH3 and NH4+
by N)
- TCVN 6179-1:1996 (ISO 7150-1:1984)
- Water quality - Determination of ammonium - Part 1: Manual spectrometric
method
- Or TCVN 6660:2000 (ISO
14911:1988) - Water quality - Determination of dissolved Li+, Na+,
NH4+, K+, Mn++, Ca++,
Mg++, Sr++ and Ba++ using ion
chromatography. For water and wastewater
- Or TCVN 5988:1995 (ISO
5664:1984) - Water quality - Determination of aminonium - Distillation and
titration method
- SMEWW 4500-NH3:2023
- Nitrogen (ammonia) by Titrimetric method or Ammonia-selective electrode
method or Phenate method
- Or EPA 350.2 - Revision 1974 -
Nitrogen, Ammonia (Colorimetric, Titrimetric, Potentiometric distillation
procedure)
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Nickel, Copper, Zinc, Cadmium,
Lead
- TCVN 13090:2020 - Water quality
- Determination of metals by flame atomic absorption spectrometry - Direct
air-acetylene flame method
- Or SMEWW 3111:2023 or SMEWW
3113:2023 Metals by Flame atomic absorption or Electrothermal atomic
absorption spectrometry
- SMEWW 3120B:2023 - Metals by
Inductively coupled plasma (ICP/OES)
13
Chromium
- TCVN 6222 - 2008 (ISO 9174
-1998) - Water quality – Determination of chromium – Atomic absorption
spectrometric methods
14
Cadmium
...
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...
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- Or TCVN 13091:2020 - Water
quality — Determination of metals by electrothermal atomic absorption
spectrometric method
- Or SMEWW 3113:2023 - Metals by
Electrothermal atomic absorption spectrometry
15
Barium, Bor
- TCVN 13092:2020 - Water quality
— Determination of metals by inductively coupled plasma-mass spectrometry
(ICP-MS) method
16
Selenium
- TCVN 6183-1996 (ISO
9964-1-1993) - Water quality - Determination of selenium - Atomic absorption
spectrometric method (hydride technique)
- Or SMEWW 3114:2023 - Arsenic
and Selenium by Hydride generation atomic absorption spectrometry
...
...
...
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Manganese
- TCVN 6002 - 1995 (ISO 6333 -
1986) - Water quality - Determination of manganese - Formaldoxime
spectrometric method
18
Permanganate
- TCVN 6186:1996 (ISO 8467:1993
(E)) - Water quality - Determination of permanganate index
19
Chloride
- TCVN 6194 - 1996 (ISO 9297 -
1989) - Water quality - Determination of chloride - Silver nitrate titration
with chromate indicator (Mohr\'s method)
- Or SMEWW 4110B:2023 -
Determination of anions by Ion chromatography with chemical suppression of
eluent conductivity
...
...
...
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20
Hardness, by CaCO3
- TCVN 6224:1996 - Water quality
- Determination of the sum of calcium and magnesium - EDTA titrimetric method
- Or SMEWW 2340:2023 - Hardness
by calculation or EDTA titrimetric method
21
Fluoride, Chloride, Nitrite,
Nitrate, and Sulfate
- TCVN 6494:2011 (ISO
13040-1:2007) - Water quality - Determination of dissolved anions by liquid
chromatography of ions - Part 1: Determination of dissolved anions by liquid
chromatography of ions
- Or TCVN 6195:1996 (ISO
10359-1:1992) - Water quality - Determination of fluoride - Part 1:
Electrochemical probe method for potable and lightly polluted water
- Or TCVN 6494-1:2011 (ISO
10304-1:2007) Water quality - Determination of dissolved anions by liquid
chromatography of ions - Part 1: Determination of bromide, chloride,
fluoride, nitrate, nitrite, phosphate and sulfate
...
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22
Nitrate
- TCVN 6180-1996 (ISO 7890-3:1988
(E)) Water quality - Determination of nitrate - Spectrometric method using
sulfosalicylic acid
- Or SMEWW 4500-NO3-:2023
- Nitrogen (nitrate) by Ultraviolet spectrophotometric screening method or
Cadmium reduction method
23
Nitrite
- TCVN 6178 - 1996 (ISO
6777-1984) - Water quality - Determination of nitrite - Molecular absorption
spectrometric method
- Or TCVN 6494-1:2011 (ISO
10304-1:2007) Water quality - Determination of dissolved anions by liquid
chromatography of ions - Part 1: Determination of bromide, chloride,
fluoride, nitrate, nitrite, phosphate and sulfate
24
...
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- TCVN 6177:1996 (ISO 6332:1988)
- Water quality - Determination of iron- Spectrometric method
- Or SMEWW 3500-Fe B:2023 - Iron
by Phenanthroline method
25
Sulfate
- SMEWW 4500-SO42-
E:2023 - Sulfate by Turbidimetric method
- Or EPA 375.4 - Revision 1978 - Sulfate
(Turbidimetric)
26
Sulfide
- TCVN 6637:2000 (ISO 10530:1992)
- Water quality - Determination of dissolved sulfide - Photometric method
using methylene blue
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27
Mercury
- TCVN 7877:2008 (ISO 5666:1999)
- Water quality - Determination of mercury
- Or TCVN 7724:2007 (ISO
17852:2006) - Water quality - Determination of mercury - Method using atomic
fluorescence spectrometry
- Or SMEWW 3112B:2023 - Metals by
Cold-vapor atomic absorption spectrometric method
28
Arsenic, Chromium, Copper, Zinc,
Nickel, Manganese, Iron, Mercury, Selenium, Lead, Cadmium, Zinc, Lead
- US EPA 6020 - Revision 0,
September 1994 - Water quality - Determination of concentration of Arsenic,
Chromium, Copper, Zinc, Nickel, Manganese, Iron, Mercury, Selenium, Lead,
Cadmium, etc. using Inductively coupled plasma - mass spectrometry (ICP/MS)
- Or US EPA 200.8 - Determination
of trace elements in waters and wastes by inductively coupled plasma - mass
spectrometry (ICP/MS)
...
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Antimony, Aluminium, Arsenic,
Bor, Barium, Cadmium, Chromium, Copper, Iron, Manganese, Sodium, Nickel,
Lead, Selenium, Zinc, Mercury
- TCVN 6665:2011 (ISO 11885:2007)
- Water quality – Determination of selected elements: Aluminium, Arsenic,
Bor, Barium, Cadmium, Chromium, Copper, Iron, Manganese, Sodium, Nickel,
Lead, Selenium, Zinc, Mercury, etc. by inductively coupled plasma optical
emission spectrometry (ICP-OES)
- Or TCVN 13092:2020 - Water
quality — Determination of metals by inductively coupled plasma-mass
spectrometry (ICP-MS) method
- Or SMEWW 3125B:2023 - Metals by
Inductively coupled plasma-Mass spectrometry method (ICP/MS)
30
Total dissolved solids (TDS)
- SMEWW 2540C:2023 - Solids by
Total dissolved solids dried at 180°C
31
Cyanide
...
...
...
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- Or SMEWW 4500-CN- A,
B, C, E:2023 - Total cyanide after distrillation or Cyanide by Colorimetric
method
32
Chloroalkanes
(1,1,1-Trichloroethane, 1,2 - Dichloroethane, 1,2- Dichloroethene, Carbon
tetrachloride, Dichloromethane, Tetrachloroethene, Trichloroethene, Vinyl
chloride)
- US EPA 5021A - Revision 2, July
2014 - Volatile organic compounds in various sample matrices using
equilibrium headspace analysis
- Or US EPA 524.3 - Version 1.0,
June 2009 - Measurement of purgeable organic compounds in water by capillary
column gas chromatography/mass spectrometry
33
Acrylamide
- US EPA 8032A - Revision 1,
December 1996 - Acrylamide by gas chromatography
34
...
...
...
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- US EPA 8260D-1 - Revision 4,
February 2017 - Volatile organic compounds by gas chromatography/mass
spectrometry (GC/MS)
- Or US EPA 8270E - Revision 6,
June 2018 - Semivolatile organic compounds by gas chromatography/mass
spectrometry
35
Hexachloro butadiene, 1,2 -
Dibromo - 3 Chloropropane, 1,2 - Dichloropropane, 1,3 - Dichloropropene,
Bromodichloromethane, Bromoform, Dibromochloromethane
- US EPA 524.4 - Revision 1.0,
May 2013 - Measurement of purgeable organic compounds in water by gas
chromatography/mass spectrometry using nitrogen purge gas (GC/MS)
36
2,4 - D; 2,4 DB, Dichloprop;
2,4,5-T
- US EPA 515.4, Revision 1-0,
April 2000 - Determination of chlorinated acids in drinking water by
liquid-liquid microextraction, derivatization, and fast gas chromatography
with electron capture detection
37
...
...
...
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- US EPA 525.3 - Version 1.0,
February 2012 - Determination of semivolatie organic chemicals (SVOCs) in
drinking water by solid phase extraction and capillary column gas
chromatography/mass spectrometry (GC/MS)
- Or US EPA 551.1 - Revision 1.0,
1995 - Determination of chlorination disinfection byproducts, chlorinated
solvents and halogenated pesticides/herbicides in drinking water by
liquid-liquid extraction and gas chromatography with electron-capture
detection
38
Chlorotoluron, Isoproturon
US EPA 532 - Revision 1.0, 2000 -
Determination of phenylurea compounds in drinking water by solid phase
extraction and high performance liquid chromatography with UV detection
(Chlorotoluton and Isoproturon
are members of the class of phenylureas which can be determined via EPA 532)
39
Aldicarb, Carbofuran
- US EPA 531.2 - Revision 1.0,
September 2001 - Measurement of N-methylcarbamoyloximes and
N-methylcarbamates in water by direct aqueous injection HPLC with post column
derivatization
...
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2,4 -D, 2,4 DB, Dichloprop, MCPA,
2,4,5 -T, Mecoprop
- US EPA 555 - Revision 1.0,
August 1992 - Determination of chlorinated acids in water by high performance
liquid chromatography with a photodiode array ultraviolet detector
41
Pendimethalin, Alachlor,
Atrazine, Metolachlor, Molinate, Simazine
- US EPA 507 - Revision 2.1, 1995
- Determination of Nitrogen and Phosphorus containing pesticides in water by
gas chromatography with a nitrogenphosphorus detector
- Or US EPA 525.3 - Version 1.0,
February 2012 - Determination of semivolatie organic chemicals in drinking
water by solid phase extraction and capillary column gas chromatography/mass
spectrometry (GC/MS)
42
Pendimethalin
- US EPA 8091 - Revision 0,
December 1996 - Nitroaromatics and cyclic ketones by gas chromatography
...
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Chlordane, DDT and derivatives,
Methoxychlor, Atrazine, Simazine, Permethrin
- US EPA 1699 - December 2007 -
Pesticides in water, soil, sediment, biosolids and tissue by HRGC/HRMS
- Or US EPA 525.3 - Version 1.0,
February 2012 - Determination of semivolatie organic chemicals (SVOCs) in
drinking water by solid phase extraction and capillary column gas
chromatography/mass spectrometry (GC/MS)
44
Hydroxyantrazine
- US EPA 525.3 - Version 1.0,
February 2012 - Determination of semivolatie organic chemicals (SVOCs) in
drinking water by solid phase extraction and capillary column gas
chromatography/mass spectrometry (GC/MS)
(Hydroxyatrazine is a member
of the atrazine class which can be determined by EPA 532.3 as atrazine)
45
Propanil
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...
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46
Carbofuran, Chlordane,
Pentachlorophenol, 1,2- Dichlorobenzene, 1,4- Dichlorobenzene,
Trichlorobenzene, Hexachloro butadiene, Methoxychlor, phenol, 2,4,6
Trichlorophenol
- TCVN 6216:1996 (ISO 6439:1990)
- Determination of total phenol by colorimetric test
- Or US EPA 8270E - Revision 6,
June 2018 - Semivolatile organic compounds by gas chromatography/mass
spectrometry
- Or US EPA 524.3 - Version 1,
June 2009 - Measurement of purgeable organic compounds in water by capillary
column gas chromatography/mass spectrometry.
- Or US EPA 528.1 - Version 1,2000
- Determination of phenols in drinking water by solid phase extraction and
capillary column gas chromatography/mass spectrometry
- Or US EPA 5030C - Revision 3,
May 2023 - Purge and trap method for analysis of VOCs in aquaous and water
miscible liquid samples
47
Bromine
...
...
...
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- Or US EPA 300.1 - Revision 1,
1999 - Determination of inorganice anions in drinking water by ion
chromatography
48
Acid monochloroacetic; acid
dichloroacetic and acid trichloroacetic
- SMEWW 6251:2023 - Disinfection
byproducts by Micro liquid-liquid extraction gas chromatographic method.
- Or US EPA 552.3 - Revision 1.0,
July 2003 - Determination of haloacetic acids and dalapon in drinking water
by liquid-liquid microextraction, derivatization, and gas chromatography with
electron capture detection
49
Dibromoaxetonitrile,
Dicloroaxetonitrile, Tricloroaxetonitrile, Carbon tetrachloride, 1,2- Dibromo
– 3 Cloropropan, Alachlor, Atrazine, Metolachlor, Simazine, Trifluralin,
Methoxychlor
- US EPA 551.1 - Revision 1.0,
1995 - Determination of chlorination disinfection byproducts, chlorinated
solvents and halogenated pesticides/herbicides in drinking water by
liquid-liquid extraction and gas chromatography with electron capture
detection
50
...
...
...
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- US EPA 556.1 - Revision 1.0,
September 1999 - Determination of carbonyl compounds in drinking water by
fast gas chromatography
- Or SMEWW 6252:2023:
Disinfection byproducts: aldehydes by PFBHA Liquid-liquid extraction gas
chromatographic method
- Or EPA 8315A - Revision 1,
December 1996 - Determination of carbonyl compounds by high performance
liquid chromatography (HPLC)
51
Bromoform, Chloroform,
Dibromochloromethane, Bromodichloromethane
- US EPA 501.3 - 1996,
Measurement of Trihalomethanes in drinking water with gas chromatography/mass
spectrometry and selected ion monitoring (GC-MS-SIM)
- US EPA 5021A - Revision 2, July
2014 - Volatile organic compounds in various sample matrices using equilibrium
headspace analysis
- Or US EPA 524.2 - Revision
4.1,1995- Measurement of purgeable organic compounds in water by capillary
column gas chromatography/mass spectrometry
- Or US EPA 551.1 - Revision 1.0,
1995 - Determination of chlorination disinfection byproducts, chlorinated
solvents and halogenated pesticides/herbicides in drinking water by
liquid-liquid extraction and gas chromatography with electron-capture
detection
...
...
...
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Total activity α
- TCVN 6053:2021 (ISO 9696:2017)
- Gross alpha activity – Test method using thick source
- Or TCVN 8879:2011 (ISO
10704:2009) - Measurement of gross alpha and gross beta activity in
non-saline water - Thin source deposit method
- Or ISO 10704:2019 - Water
quality - Determination of alpha activity and beta activity - Thin source
method
- Or SMEWW 7110B:2023 - Gross
alpha and gross beta radioactivity by Evaporation Method
Total activity β
- TCVN 6219:2021 (ISO 9697:2018)
- Determination of total beta activity in non-saline water
- Or TCVN 8879:2011 (ISO
10704:2009) - Measurement of gross alpha and gross beta activity in
non-saline water - Thin source deposit method
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- Or SMEWW 7110B:2023 - Gross
alpha and gross beta radioactivity by Evaporation Method
Methods with quantitative limit
conforming to permissible limits, equivalent or higher accuracy (including
precision and trueness) are accepted.