NATIONAL TECHNICAL REGULATION ON AIR QUALITY
Foreword
QCVN 05:2023/BTNMT is developed by the Pollution Control Department, submitted by the Department of Science and Technology and Department of Legislation for approval; appraised by the Ministry of Science and Technology and promulgated together with the Circular No. 01/2023/TT-BTNMT dated March 13, 2023 of the Minister of Natural Resources and Environment.
QCVN 05:2023/BTNMT supersedes QCVN 05:2013/BTNMT and QCVN 06:2009/BTNMT.
NATIONAL TECHNICAL REGULATION ON AIR QUALITY
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1.1.1. This Regulation provides for maximum permissible limits of basic parameters and toxic parameters in ambient air.
1.1.2. This Regulation is applied to monitor and assess quality of ambient air.
1.1.3. This Regulation does not apply to indoor air.
1.2. Regulated entities
This Regulation applies to environment authorities, organizations, residential communities, households and individuals whose activities involve air quality within Vietnam’s territory.
1.3. Definitions
For the purposes of this Regulation, the terms below shall be construed as follows:
1.3.1. “basic parameters” refer to those used to carry out periodic, automatic and continuous monitoring in order to monitor air quality, including SO2 (sulfur dioxide), CO (carbon monoxide), NO2 (nitrogen dioxide), O3 (ozone), TSP (total suspended particles), PM10, PM2.5.
1.3.2. “toxic parameters” refer to inorganic or organic compounds that are harmful to human health and the environment, and selected for monitoring according to objectives of a monitoring program.
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1.3.3. “PM10” refers to particles of which the aerodynamic diameter is ≤ 10 µm.
1.3.3. “PM2.5” refers to particles of which the aerodynamic diameter is ≤ 2.5 µm.
1.3.6. “01-hour average” refers to the average of the values measured over an hour.
1.3.7. “8-hour average” refers to the average of the values measured over 8 hours.
1.3.8. “24-hour average” refers to the average of the values measured over 24 hours.
1.3.8. “annual average” refers to the average of the values measured over a year.
1.3.10. “standard cubic meter of gas” (Nm3) refers to the cubic meter of gas at a temperature of 25ºC and an absolute pressure of 760 mm of mercury.
2.1. Maximum permissible limits of basic parameters in ambient air are specified in Table 1.
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Unit: μg/Nm3
No.
Parameter
1-hour average
8-hour average
24-hour average
Annual average
1
SO2
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-
125
50
2
CO
30.000
10.000
-
-
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NO2
200
-
100
40
4
O3
200
120
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-
5
Total suspended particles (TSP)
300
-
200
100
6
PM10
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-
100
50
7
PM2,5
-
-
50
45(*)
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Notes:
- (-): N/A
- (*): Concentration value, applicable from January 01, 2026.
2.2. Maximum permissible limits of toxic parameters in ambient air are specified in Table 2.
Table 2: Maximum permissible limits of toxic parameters in ambient air
Unit: μg/Nm3
No.
Parameter
Averaging time
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Inorganic compounds
1
Lead (Plumbum) (Pb) and its compounds (expressed as Lead)
24 hours
1,5
2
Arsenic (Plumbum) (Pb) and its compounds (expressed as As)
1 hour
0,03
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Arsenic Trihydride (AsH3)
1 hour
0,3
4
Hydrochloride (HCl)
24 hours
60
5
Nitric Acid (HNO3)
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400
24 hours
150
6
Sulfuric acid (H2SO4)
1 hour
300
24 hours
50
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Respirable crystalline Silicon Oxide (SiO2)
1 hour
150
24 hours
50
8
Serpentine white asbestos
24 hours
1 fiber/m3
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Cadmium (Cd) and its compounds (expressed as Cd)
1 hour
0,4
8 hours
0,2
10
Chlorine (Cl2)
1 hour
100
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30
11
Chromium (6+) (Cr6+) and its compounds
1 hour
0,007
24 hours
0,003
12
Hydrogen fluoride (HF)
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20
24 hours
5
13
Hydrogen Cyanide (HCN)
1 hour
10
14
Manganese and its compounds (expressed as MnO2)
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10
24 hours
8
15
Nickel (Ni) and its compounds (expressed as Ni)
24 hours
1
16
Mercury (Hydrargyrum) (Hg) and its compounds (expressed as Hg)
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0,3
17
Sodium hydroxide (NaOH)
24 hours
10
Organic compounds
18
Acrolein (CH2=CHCHO)
1 hour
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19
Acrylonitrile (CH2=CHCN)
24 hours
45
20
Aniline (C6H5NH2)
1 hour
50
24 hours
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21
Benzene (C6H6)
1 hour
22
22
Benzidine (NH2C6H4C6H4NH2)
1 hour
Not detected
23
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24 hours
16
24
Total Hydrocarbon (CxHy)
1 hour
5000
24 hours
1500
25
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1 hour
20
26
Naphthalene (C10H8)
8 hours
500
24 hours
120
27
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1 hour
10
28
Tetrachloethylene (C2Cl4)
24 hours
100
29
Vinyl chloride (CICH=CH2)
24 hours
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Compounds causing unpleasant odors
30
Ammonia (NH3)
1 hour
200
31
Acetaldehyde (CH3CHO)
1 hour
45
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Propionic acid (CH3CH2COOH)
8 hours
300
33
Hydrogen sulfide (H2S)
1 hour
42
34
Mercaptan expressed as Methyl Mercaptan (CH3SH)
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50
24 hours
20
35
Styrene (C6H5CH=CH2)
24 hours
260
36
Toluene (C6H5CH3)
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500
37
Xylene (C6H4(CH3)2)
1 hour
1000
3.1. Monitoring methods intended for determining concentrations of basic and toxic parameters in ambient air are specified under Table 3 or environmental monitoring techniques promulgated by the Ministry of Natural Resources and Environment.
Table 3. Methods for monitoring parameters in ambient air
No.
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Monitoring method, standard code
1
SO2
TCVN 5971:1995;
TCVN 7726:2007;
MASA 704A;
MASA 704B;
NIOSH 6004
2
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TCVN 5972:1995;
TCVN 7725:2007;
MASA 128;
OSHA ID-209;
OSHA ID 210;
ASTM D 3162
3
NO2
TCVN 6137:2009;
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ASTM D1607
4
O3
TCVN 6157:1996;
TCVN 7171:2002
5
Total suspended particles (TSP)
TCVN 5067:1995;
TCVN 9469:2012 (ISO 10473:2010);
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ASTM D 4096 -17
6
PM10
40 CFR part 50 Method appendix J;
AS/NZS 3580.9.7:2009;
AS/NZS 3580.9.6:2003;
US EPA Compendium Method IO-2.1 (high volume)
7
PM2.5
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AS/NZS 3580.9.7:2009
8
Lead (Plumbum) (Pb)
TCVN 6152:1996;
NIOSH Method 7300;
NIOSH Method 7301;
NIOSH Method 7302;
NIOSH Method 7303;
NIOSH Method 7082;
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ASTM D4185-96;
US EPA Compendium Method IO-3.2;
US EPA Compendium Method IO-3.3;
US EPA Compendium Method IO-3.4;
ISO 9855:1993;
ISO 8518:2001
9
Arsenic (As)
NIOSH 7300;
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US EPA Compendium Method IO-3.3;
US EPA Compendium Method IO-3.4
10
Arsenic Trihydride (AsH3)
NIOSH method 6001
11
Hydrochloride (HCl)
NIOSH Method 7907
12
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NIOSH method 7907
13
Acid Sulfuric (H2SO4)
NIOSH Method 7908
14
Respirable crystalline Silicon Oxide (SiO2)
TCVN 8945:2011
15
Serpentine white asbestos
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16
Cadmium (Cd)
ASTM D4185-96;
NIOSH Method 7048;
NIOSH 7300;
US EPA Compendium Method IO-3.2;
US EPA Compendium Method IO-3.3;
US EPA Compendium Method IO-3.4;
ISO 11174:1996
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Chlorine (Cl2)
MASA 202
18
Chromi (6+) (Cr6+)
NIOSH Method 7600;
OSHA Method ID 215;
ASTM D 6832
19
Hydrogen fluoride (HF)
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MASA 205;
MASA 203F;
NIOSH Method 7906
20
Hydrogen Cyanide (HCN)
NIOSH Method 6017;
NIOSH Method 6010D
21
Manganese (Mn)
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NIOSH 7300;
US EPA Compendium Method IO-3.2;
US EPA Compendium Method IO-3.3;
US EPA Compendium Method IO-3.4
22
Nickel (Ni)
ASTM D4185-96;
NIOSH 7 Method 300;
US EPA Compendium Method IO-3.2;
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US EPA Compendium Method IO-3.4
23
Mercury (Hydrargyrum) (Hg)
ISO 17733:2015;
NIOSH Method 6009;
OSHA Method ID 140
24
Sodium hydroxide (NaOH)
ISO 17091:2013;
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25
Acrolein (CH2=CHCHO)
NIOSH method 2501
26
Acrylonitrile (CH2=CHCN)
NIOSH method 1604
27
Aniline (C6H5NH2)
NIOSH method 2002
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Benzene (C6H6)
TCVN 12247-1:2018;
ASTM D 3686-95;
ISO 16017-1:2000;
US EPA Method TO-17;
MASA 834;
NIOSH Method 1501;
ASTM D 3686-95;
ISO 16017-1:2000;
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29
Benzidine (NH2C6H4C6H4NH2)
NIOSH method 5509
30
Chloroform (CHCl3)
NIOSH method 1003
31
Total Hydrocarbon (CxHy)
NIOSH method 1500
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Formaldehyde (HCHO)
NIOSH Method 2541;
NIOSH Method 3500;
OSHA Method 52;
US EPA Compendium Method TO-11A
33
Naphtalene (C10H8)
OSHA Method 35;
NIOSH method 1501
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Phenol (C6H5OH)
NIOSH Method 3502;
OSHA Method 32;
NIOSH 2546
35
Tetrachloethylene (C2Cl4)
US.EPA Method TO-17;
NIOSH Method 1003
36
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US EPA Method TO-17;
NIOSH Method 1007
37
Ammonia (NH3)
TCVN 5293:1995;
MASA 401
38
Acetaldehyde (CH3CHO)
NIOSH Method 2538
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Propionic acid (CH3CH2COOH)
OSHA method PV2293
40
Hydrogen sulfide (H2S)
MASA 701
41
Mercaptan expressed as Methyl Mercaptan (CH3SH)
TCVN 10026:2020 (ASTM D2913-14);
ASTM D2913 - 96(2007);
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42
Styrene (C6H5CH=CH2)
TCVN 12247-1:2018;
ASTM D 3686-95;
ISO 16017-1:2000;
US EPA Method TO-17;
MASA 834;
NIOSH Method 1501;
ASTM D 3686-95
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Toluene (C6H5CH3)
TCVN 12247-1:2018;
ISO 16017-1:2000;
US EPA Method TO-17;
MASA 834;
NIOSH Method 1501;
ASTM D 3686-95
44
Xylene (C6H4(CH3)2)
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ASTM D 3686-95;
ISO 16017-1:2000;
US EPA Method TO-17;
MASA 834;
NIOSH Method 1501
3.2. In addition to the monitoring methods specified in 3.1, the monitoring results from automatic and continuous air quality monitoring equipment that meets technical specifications as prescribed by law are acceptable.
4.1. Periodic or automatic and continuous monitoring of air quality and use of monitoring results for directly providing and disclosing information about environmental quality to the community must be performed by organizations that meet the requirements and conditions for environmental monitoring capacity according to the provisions of law.
4.2. Periodic monitoring of air quality shall be carried out according to monitoring goals to choose appropriate parameters to be monitored.
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5.1. Environment authorities shall provide guidance on, inspect and supervise the implementation of this Regulation.
5.2. In the cases where any of the documents referred to in this Regulation is amended or replaced, the newest one shall apply.
National Technical Regulation QCVN 05:2023/BTNMT for Air quality
| Số hiệu: | QCVN05:2023/BTNMT |
|---|---|
| Loại văn bản: | Quy chuẩn |
| Nơi ban hành: | Bộ Tài nguyên và Môi trường |
| Người ký: | *** |
| Ngày ban hành: | 13/03/2023 |
| Ngày hiệu lực: | Đã biết |
| Tình trạng: | Đã biết |
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