National technical regulation on Surface water quality (QCVN 08:2023/BTNMT)
QCVN 08:2023/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.
Table 1. Maximum permissible limits of parameters affecting human health
|
No. |
Parameter |
Unit |
Maximum limit |
|
1 |
Nitrite (NO-2 expressed as N) |
mg/L |
0.05 |
|
2 |
Ammonium (NH4+ expressed as N) |
mg/L |
0.3 |
|
3 |
Chloride (Cl-) |
mg/L |
250 |
|
4 |
Fluoride (F-) |
mg/L |
1 |
|
5 |
Cyanide (CN-) |
mg/L |
0.01 |
|
6 |
Arsenic (As) |
mg/L |
0.01 |
|
7 |
Cadmium (Cd) |
mg/L |
0.005 |
|
8 |
Lead (Plumbum) (Pb) |
mg/L |
0.02 |
|
9 |
Chromium (6+) (Cr6+) |
mg/L |
0.01 |
|
10 |
Total Chromium (Cr) |
mg/L |
0.05 |
|
11 |
Copper (Cuprum) (Cu) |
mg/L |
0.1 |
|
12 |
Zinc (Zincum) (Zn) |
mg/L |
0.5 |
|
13 |
Nickel (Ni) |
mg/L |
0.1 |
|
14 |
Manganese (Mn) |
mg/L |
0.1 |
|
15 |
Mercury (Hydrargyrum) (Hg) |
mg/L |
0.001 |
|
16 |
Iron (Ferrum) (Fe) |
mg/L |
0.5 |
|
17 |
Antimony (Sb) |
mg/L |
0.02 |
|
18 |
Anionic surfactant |
mg/L |
0.1 |
|
19 |
Total phenol |
mg/L |
0.005 |
|
20 |
Aldrin (C12H8Cl6) |
µg/l |
0.1 |
|
21 |
Lindane (C6H6Cl6) |
µg/L |
0.02 |
|
22 |
Dieldrin (C12H8Cl6O) |
µg/L |
0.1 |
|
23 |
Total DDT (1,1'-(2,2,2-Trichloroethane-1,1-diyl) bis(4-chlorobenzene) (C14H9Cl5) |
µg/L |
1.0 |
|
24 |
Heptachlor & Heptachlorepoxide (C10H5Cl7 & C10H5Cl7O) |
µg/L |
0.2 |
|
25 |
Total oils & grease |
mg/L |
5.0 |
|
26 |
Polychlorinated biphenyls (PCBs) |
mg/L |
0.0005 |
|
27 |
Tetrachloroethylene PCE (C2Cl4) |
mg/L |
0.04 |
|
28 |
1,4-Dioxane (C4H8O2) |
mg/L |
0.05 |
|
29 |
Carbon tetrachloride (CCl4) |
mg/L |
0.004 |
|
30 |
1,2 Dichloroethane (C2H4Cl2) |
mg/L |
0.03 |
|
31 |
Methylene chloride (CH2Cl2) |
mg/L |
0.02 |
|
32 |
Benzene (C6H6) |
mg/L |
0.01 |
|
33 |
Chloroform (CHCl3) |
mg/L |
0.08 |
|
34 |
Formaldehyde (CH2O) |
mg/L |
0.5 |
|
35 |
Bis (2-ethylHexyl)phthalate DEHP (C24H38O4) |
mg/L |
0.008 |
|
36 |
Hexachlorobenzene (C6Cl6) |
µg/L |
0.04 |
|
37 |
Organophosphorus pesticide |
µg/L |
0.5 |
|
38 |
Gross alpha activity α |
Bq/L |
0.1 |
|
39 |
Gross beta activity β |
Bq/L |
1.0 |
|
40 |
E.coli |
MPN /100 mL or CFU/100 mL |
20 |
Table 2. Permissible limits of parameters in surface water to classify quality of water in rivers, streams, canals and ditches and to protect underwater habitats
|
Parameter |
Water quality class |
|||||||||
|
pH |
BOD5 (mg/L) |
COD (mg/L) |
TOC (mg/L) |
TSS (mg/L) |
DO (mg/L) |
Total Phosphorus (mg/L) |
Total nitrogen (mg/L) |
Total Coliforms (CFU/100 mL or MPN/100ml) |
Heat-resistant coliforms |
|
|
6.5 - 8.5 |
≤ 4 |
≤ 10 |
≤ 4 |
≤ 25 |
≥ 6.0 |
≤ 0.1 |
≤ 0.6 |
≤ 1000 |
≤ 200 |
A |
|
6.0 - 8.5 |
≤ 6 |
≤ 15 |
≤ 6 |
≤ 100 |
≥ 5.0 |
≤ 0.3 |
≤ 1.5 |
≤ 5000 |
≤ 1000 |
B |
|
6.0 - 8.5 |
≤ 10 |
≤ 20 |
≤ 8 |
> 100 and Absence of floating trash |
≥ 4.0 |
≤ 0.5 |
≤ 2.0 |
≤ 7500 |
≤ 1500 |
C |
|
< 6.0 or >8.5 |
> 10 |
> 20 |
> 8 |
> 100 and Presence of floating trash |
≥ 2.0 |
> 0.5 |
> 2.0 |
> 7500 |
> 1500 |
D |
Table 3. Permissible limits of parameters in surface water to classify quality of water in lakes, ponds and lagoons and to protect aquatic habitats
|
Parameter |
Water quality class |
||||||||||
|
pH |
BOD5 (mg/L) |
COD (mg/L) |
TOC (mg/L) |
TSS (mg/L) |
DO (mg/L) |
Total Phosphorus (mg/L) |
Total nitrogen (mg/L) |
Chlorophyll-a (mg/m3) |
Coliform group |
|
|
|
Total coliforms |
Heat-resistant coliforms |
||||||||||
|
6.5-8.5 |
≤ 4 |
≤ 10 |
≤ 4 |
≤ 5 |
≥ 6.0 |
≤ 0.1 |
≤ 0.6 |
≤ 14 |
≤ 1000 |
≤ 200 |
A |
|
6.0-8.5 |
≤ 6 |
≤ 15 |
≤ 6 |
≤ 15 |
≥ 5.0 |
≤ 0.3 |
≤ 1.5 |
≤ 35 |
≤ 5000 |
≤ 1000 |
B |
|
6.0-8.5 |
≤ 10 |
≤ 20 |
≤ 8 |
> 15 and Absence of floating trash |
≥ 4.0 |
≤ 0.5 |
≤ 2.0 |
≤ 70 |
≤ 7500 |
≤ 1500 |
C |
|
< 6.0 or >8.5 |
> 10 |
> 20 |
> 8 |
> 15 and Presence of floating trash |
≥ 2.0 |
> 0.5 |
> 2.0 |
> 70 |
> 7500 |
> 1500 |
D |
National technical regulation on Domestic Water Quality (QCVN 01-1:2018/BYT)
