Guideline Values – CPCB
Standards Classification
of Inland Surface Water
| S. No. |
Characteristics |
A’ |
B’ |
C’ |
D’ |
E’ |
| 1. |
Dissolved
Oxygen, mg/L, Min |
6 |
5 |
4 |
4 |
- |
| 2. |
Biochemical
Oxygen Demand, mg/ L Max |
2 |
3 |
3 |
- |
- |
| 3. |
Total
Coli form Organisms* MPN/100 ml, Max |
50 |
500 |
5000 |
- |
- |
| 4. |
Total
Dissolved Solids mg/L Max |
500 |
- |
1500 |
- |
2100 |
| 5. |
Chlorides
(as CL), mg/L, Max |
250 |
- |
600 |
- |
600 |
| 6. |
Colour,
Hazen Units, Max |
10 |
300 |
300 |
- |
- |
| 7. |
Sodium
Absorption Ratio, Max |
- |
- |
- |
- |
26 |
| 8. |
Boron
(as B), mg/L Max |
- |
- |
- |
- |
2 |
| 9. |
Sulphates
(as SO4), mg/L Max |
400 |
- |
400 |
- |
1000 |
| 10. |
Nitrates
(as NO3), mg/L Max |
20 |
- |
50 |
- |
- |
| 11 |
Free
Ammonia (as N), mg/L Max |
- |
- |
- |
1.2 |
- |
| 12. |
Conductivity
at 25°C, micromhos/cm, Max |
- |
- |
- |
1000 |
2250 |
| 13. |
pH
value |
6.5-8.5 |
6.5-8.5 |
6.5-8.5 |
6.5-8.5 |
6.5-8.5 |
| 14. |
Arsenic
(as As), mg/L Max |
0.05 |
0.2 |
0.2 |
- |
- |
| 15. |
Iron
(as Fe), mg/l, Max |
0.3 |
- |
50 |
- |
- |
| 16. |
Fluorides
(as F), mg/L, Max |
1.5 |
1.5 |
1.5 |
- |
- |
| 17. |
Lead
(as Pb), mg/L Max |
0.1 |
- |
0.1 |
- |
- |
| 18. |
Copper
(as Cu), mg/L, Max |
1.5 |
- |
1.5 |
- |
- |
| 19. |
Zinc
(as Zn), mg/L, Max |
15 |
- |
15 |
- |
- |
*
If the coliform is found to be more than the prescribed
tolerance limits, the criteria for coliform shall
be satisfied if not more than 20 percent of samples
show more than the tolerance limit specified, and
not more than 5 percent of samples show values more
than 4 times the tolerance limits. Further, the faecal
coliform should not be more than 20 percent of the
coliform.
Source : Indian Standard (IS : 2296 – 1982).
A’ Drinking water surface Without conventional
treatment but after disinfection
B’ Outdoor bathing (organized)
C’ Drinking water source with conventional
treatment followed by disinfection
D’ Propagation of wild life, fisheries
E’ Irrigation, industrial, cooling, controlled
waste disposal
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