Water Quality Standards

WATER QUALITY STANDARDS FOR DRINKING WATER S.No 1 2 3 4 5

Parameters pH value DO (mg/l) BOD (5day20oC,mg/l) MPN/100 ml, max Color, Hazen units

USPHS 7-8.5 -

BIS 6.5-8.5 6 2

5

50 10

ICMR 6.5-9.2 -

WHO 6.5-9.2 50 on pt-co scale Tasteless 200 150

Nil Tasteless 500 200 75

Nil Tasteless 500 300 200

30

100

150

0.05 0.1 0.05

1.5 0.3 0.5

3.0 1.0 0.5

1.5 1.0 0.5

15 16

Odour Taste TDS (mg/l) Total hardness (mg/l) Calcium hardness(mg/l) Magnesium hardness(mg/l) Copper as Cu (mg/l) Iron as Fe (mg/l) Manganese as Mn(mg/l) Chlorides as Cl2(mg/l) Sulphates as So4(mg/l)

25 on pt-co scale Tasteless 200

200 200

250 400

-

400

17 18 19 20 21 22 23

Nitrates as No3 (mg/l) Fluorides, (mg/l) Cd (mg/l) Cr6+(mg/l) Zn (mg/l) Pb (mg/l) Turbidity

20 1.5 0.01 0.05 15 0.1 < 10 units

24 25 26 27 28

Total solids Total Alkalinity EC TSS (mg/l) Phosphate (mg/l)

45 1.0 0.01 0.05 5 0.1 2.5 on JTU scale 300 -

50 2.0 0.05 0.1 25 on silica scale -

6 7 8 9 10 11 12 13 14

50-200 5 -

5-100 1-1.5 0.05 0.1 25 on silica scale 1500 0.05