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Water
Water Supply and Sanitation

Sr. No.

Substance of Characteristics

Requirement
(Acceptable Limit)

Max. Permissible Limit

Physical & Chemical Characteristics Essential Characteristics

1

Colour, (Hazen units, Max)

5

15

2

Odour

Agreeable

Agreeable

3

Taste

Agreeable

Agreeable

4

Turbidity (NTU, Max)

1

5

5

pH Value

6.5 to 8.5

No Relaxation

6.

Total Dissolved Solids, mg/l, Max.

500mg/l

2000 mg/l

7

Total Hardness (as CaCo3) mg/lit. Max

200 mg/l

600 mg/l

8.

Total Alkalinity as Calcium Carbonate, mg/l, Max.

200 mg/l

600 mg/l

9

Iron (as Fe) mg/lit.Max

0.3  mg/l

No relaxation

10

Chlorides (as Cl.) mg/lit.Max

250  mg/l

1000 mg/l

11

Residual, free, chlorine, mg/lit, Min

0.2  mg/l

1.0 mg/l

Desirable Characteristics

12

Sulphate (as SO4), mg/l, Max.

200 mg/l

400 mg/l

13

Sulphide (as H2S), mg/l, Max.

0.05 mg/l

No relaxation

14

Nitrate (as NO3), mg/l, Max.

45 mg/l

No relaxation

15

Fluoride (as F), mg/l, Max.

1.0 mg/l

1.5 mg/l

16

Calcium (as Ca), mg/l, Max.

75 mg/l

200 mg/l

17

Copper (as Cu), mg/l, Max.

0.05 mg/l

1.5 mg/l

18

Magnesium (as Mg), mg/l, Max.

30 mg/l

100 mg/l

19

Manganese (as Mn), mg/l, Max.

0.1 mg/l

0.3 mg/l

20

Mercury (as Hg), mg/l, Max.

0.001 mg/l

No relaxation

21

Cadmium (as Cd), mg/l, Max.

0.003 mg/l

No relaxation

22

Selenium (as Se), mg/l, Max.

0.01 mg/l

No relaxation

213

Total Arsenic (as As), mg/l, Max.

0.01 mg/l

0.05 mg/l

24

Cyanide (as CN), mg/l, Max.

0.05 mg/l

No relaxation

25

Lead (as Pb), mg/l, Max.

0.01 mg/l

No relaxation

26

Zinc (as Zn), mg/l, Max.

5 mg/l

15 mg/l

27

Total Chromium (as Cr), mg/l, Max.

0.05 mg/l

No relaxation

28

Aluminium (as Al), mg/l, Max.

0.03 mg/l

0.2 mg/l

29

Boron (as B), mg/l, Max.

0.5 mg/l

1.0 mg/l

30

Ammonia (as total Ammonia-N), mg/l, Max.

0.5 mg/l

No relaxation

31

Barium (as Ba), mg/l, Max.

0.7 mg/l

No relaxation

32

Silver (as Ag), mg/l, Max.

0.1 mg/l

No relaxation

33

Molybdenum (as Mo), mg/l, Max.

0.07 mg/l

No relaxation

34

Nickel (as Ni), mg/l, Max.

0.02 mg/l

No relaxation

35

Phenolic Compound (as C6H5OH), mg/l, Max

0.001 mg/l

0.002 mg/l

36

Polychlorinated biphenyls, mg/l, Max.

0.0005 mg/l

No relaxation

37

Polynuclear aromatic Hydrocarbons (as PAH),
 mg/l, Max.

0.0001 mg/l

No relaxation

38

Anionic Detergents (as MBAS), mg/l, Max.

0.2 mg/l

1.0 mg/l

39

Chloramines (as Cl2), mg/l, Max.

4.0 mg/l

No relaxation

40

Trihalomethanes :

 

 

 

(a) Bromoform, mg/l, Max.

0.1 mg/l

No relaxation

 

(b) Dibromochloromethane, mg/l, Max.

0.1 mg/l

No relaxation

 

(c) Bromodichloromethane, mg/l, Max.

0.06 mg/l

No relaxation

 

(d) Chloroform, mg/l, Max.

0.2 mg/l

No relaxation

41

Radioactive Materials :

 

 

 

(a) Alpha emitters, Bq/l, Max.

0.1 Bq/l

No relaxation

 

(b) Beta  emitters, Bq/l, Max.

1.0 Bq/l 

No relaxation

 

(c) Uranium, µg/l or ppb (As per AERB)

60 µg/l or ppb

No relaxation

42

Bacteriological :

 

 

 

(a) E. Coli or thermotolerant coliform bacteria

Shall not be
detectable in any
100 ml sample

No relaxation

 

(b) Total Coliform bacteria

Shall not be
 detectable in any
100 ml sample

No relaxation

43

Mineral Oil, mg/l, Max.

0.5 mg/l

No relaxation

44

Pesticides

As per IS-10500 : 2012

No relaxation



Source: Department of Water Supply and Sanitation, Government of Punjab