The
BIS specifications for drinking water (IS: 10500-1983)
are given below:
| S.
No. |
Parameters
/ Substance |
Max.
Requirement / Desirable limit |
| 1. |
Color |
10
Hazen units |
| 2. |
Turbidity
|
10
NTU |
| 3. |
pH |
6.5
to 8.5 |
| 4. |
Total
hardness |
300
mg/l |
| 5. |
Calcium
|
75
mg/l |
| 6. |
Magnesium |
30
mg/l |
| 7. |
Copper |
0.05
mg/l |
| 8. |
Iron |
0.30
mg/l |
| 9. |
Chlorides |
250
mg/l |
| 10. |
Sulfate |
150
mg/l |
| 11. |
Nitrates |
45
mg/l |
| 12. |
Fluoride |
0.6
to 1.2 mg/l |
| 13. |
Mercury
|
0.001
mg/l |
| 14. |
Cadmium
|
0.01
mg/l |
| 15. |
Arsenic
|
0.05
mg/l |
| 16. |
Lead
|
01
mg/l |
| 17. |
Zinc
|
5.0
mg/l |
| 18. |
TDS |
500-3000
mg/l |
WHO
(1984) recommended the following guideline value for the
drinking water
| S.
No. |
Parameters/Constituents
|
Guideline
value |
| 1. |
Taste
and Odor |
Not
offensive for most consumers |
| 2. |
Turbidity
|
5
NTU |
| 3. |
pH |
6.5
to 8.5 |
| 4. |
T.
D. S. |
1000
mg/l |
| 5. |
Hardness* |
500
mg/l |
| 6. |
Color |
15
true color units |
| 7. |
Chloride |
250
mg/l |
| 8. |
Iron |
0.3
mg/l |
| 9. |
Sulfate |
400
mg/l |
| 10. |
Zinc |
5.0
mg/l |
| 11. |
Copper |
1.0
mg/l |
| 12. |
Fluoride |
1.0
to 1.2 mg/l |
*Total
Hardness =(ppm Ca x 2.497) + (ppm Mg x 4.115) + (ppm Fe
x 1.792) + (ppm Mn x 1.822)
Ambient
Air quality standards (Central Pollution Control Board)
(Concentration
in mg/m3)
| Area
Category |
SPM |
SO2 |
CO |
NO3 |
| A.
Industrial and mixed use |
500 |
120 |
5000 |
120 |
| B.
Residential and Rural |
200 |
80 |
2000 |
80 |
| C.
Sensitive (hill stations, tourist resorts, parks,
zoo, health resorts) |
100 |
30 |
1000 |
30 |
