| |
|
Water Quality, Surface
Water Standards (TCVN 5942, 1995)
Back to : Index
: ASEAN Project : Vietnam
: Implementing Regulations
Disclaimer
WATER
QUALITY:
SURFACE
WATER QUALITY STANDARD
TCVN
5942-1995
1.
Scope
1.1
This standard specifies parameter limits and maximum allowable concentrations
of pollutants in surface water.
1.2
This standard is applicable to control of quality of a surface water source.
2.
Limitation Value
2.1
Parameter limits and maximum allowable concentration of pollutants in surface
water are specified in the table 1.
2.2
Standard methods of analysis of parameters and pollutant concentrations
of surface water are specified in available current TCVNs.
Table
1
Parameter Limits
and Maximum Allowable Concentration of Pollutants in Surface Water
| Nº |
Parameter
and Substance |
Unit |
Limitation
Value |
| A |
B |
| 1 |
pH
value |
--
|
6 - 8,5
|
5,5 - 9
|
| 2 |
BOD5
(20ºC) |
mg/l
|
<4
|
<25
|
| 3 |
COD |
mg/l
|
<10
|
<35
|
| 4 |
Dissolved
oxygen |
mg/l
|
³ 6
|
³ 2
|
| 5 |
Suspended
solids |
mg/l
|
20
|
80
|
| 6 |
Arsen |
mg/l
|
0,05
|
0,1
|
| 7 |
Barium |
mg/l
|
1
|
4
|
| 8 |
Cadimium |
mg/l
|
0,01
|
0,02
|
| 9 |
Lead |
mg/l
|
0,05
|
0,1
|
| 10 |
Chromium,
Hexavalent |
mg/l
|
0,05
|
0,05
|
| 11 |
Chromium,
Trivalent |
mg/l
|
0,1
|
1
|
| 12 |
Copper |
mg/l
|
0,1
|
1
|
| 13 |
Zinc |
mg/l
|
1
|
2
|
| 14 |
Manganese |
mg/l
|
0,1
|
0,8
|
| 15 |
Nickel |
mg/l
|
0,1
|
1
|
| 16 |
Iron |
mg/l
|
1
|
2
|
| 17 |
Mercury |
mg/l
|
0,001
|
0,002
|
| 18 |
Tin |
mg/l
|
1
|
2
|
| 19 |
Ammonia
(as N) |
mg/l
|
0,05
|
1
|
| 20 |
Fluoride |
mg/l
|
1
|
1,5
|
| 21 |
Nitrate
(as N) |
mg/l
|
10
|
15
|
| 22 |
Nitrite
(as N) |
mg/l
|
0,01
|
0,05
|
| 23 |
Cyanide |
mg/l
|
0,01
|
0,05
|
| 24 |
Phenol
compounds |
mg/l
|
0,001
|
0,02
|
| 25 |
Oil
and grease |
mg/l
|
not detectable
|
0,3
|
| 26 |
Detergent |
mg/l
|
0,5
|
0,5
|
| 27 |
Coliform |
MPN/100 ml
|
5000
|
10000
|
| 28 |
Total
pesticides (except DDT) |
mg/l
|
0,15
|
0,15
|
| 29 |
DDT |
mg/l
|
0,01
|
0,01
|
| 30 |
Gross
alpha activity |
Bq/l
|
0,1
|
0,1
|
| 31 |
Gross
beta activity |
Bq/l
|
1,0
|
1,0
|
Note
-
Values in the column A
are applied to the surface water using for source of domestic water supply
with appropriate treatments.
-
Values in the column B
are applied to the surface water using for the purposes other than domestic
water supply. Quality criteria of water for aquatic life are specified
in a separate standard.
Top of Page
Acknowledgement: Text courtesy of NEA Policy Division, MOSTE.
Disclaimer: APCEL has tried to ensure
the accuracy, reliability and completeness of the information in this database;
however, APCEL does not guarantee the accuracy, reliability or completeness
of this information. If you encounter an error, please notify us by e-mail
at lawapcel@nus.edu.sg.
|
|
|
