WATER TREATMENT SYSTEMS
Guideline Values for Drinking Water
No
Parameter
CPHEEO
BIS - 1983
BIS - 1991
WHO
1.
Colour Pt/Co Scale
25
50
25
15
2.
Turbidity NTU
10
25
10
5
3.
Total Dissolved solids mg/L.
1500
3000
2000
1000
4.
pH
6.5 - 9.2
9.2 - 6.5
6.5 - 8.5
8.5 - 6.5
5.
Alkalinity (as CaCO3) mg/L.
---
---
600
---
6.
Total hardness (as CaCO3) mg/L.
600
600
600
500
7.
Calcium(as Ca) mg/L.
200
200
200
---
8.
Magnesium (as Mg) mg/L.
150
100
---
---
9.
Sodium (as Na) mg/L.
---
---
---
200
10.
Iron(as Fe) mg/L.
1.0
1.0
1.0
0.3
11.
Manganese (as Mn) mg/L.
0.5
0.5
0.3
0.1
12.
Chloride (as Cl) mg/L.
1000
1000
1000
250
13.
Fluoride (as F) mg/L.
1.5
1.5
1.5
1.5
14.
Sulphate (as SO4) mg/L.
400
400
400
400
15.
Nitrate (as NO3) mg/L.
45
45
100
45
16.
Copper (as Cu) mg/L.
1.5
1.5
1.5
1.0
17.
Cadmium (as Cd) mg/L.
0.01
0.01
0.01
0.01
18.
Selenium (as Se) mg/L.
0.01
0.01
0.01
0.01
19.
Mercury (as Hg) mg/L.
0.001
0.001
0.001
0.001
20.
Arsenic (as As) mg/L.
0.05
0.05
0.05
0.05
21.
Lead (as Pb) mg/L.
0.1
0.1
0.05
0.05
22.
Zinc (as Zn) mg/L.
15
15
15
5
23.
Chromium (as Cr) mg/L.
0.05
0.05
0.05
0.05
24.
Cyanide (as CN) mg/L.
0.05
0.05
0.05
0.01
25.
Anionic Detergents (as MBAS) mg/L.
1.0
1.0
1.0
---
26.
Phenolic compounds mg/L.
0.002
0.002
0.002
---
27.
Mineral oil mg/L.
0.03
0.03
0.03
---
28.
Pesticides mg/L.
---
---
0.001
---
29.
Free Chlorine mg/L
---
0.2
0.2
---
30.
Aluminium mg/L.
---
---
0.2
0.2
31.
Boron mg/L.
---
---
5
---
32.
Alpha emitters Bq/L
3
0.1
0.1
0.1
33.
Beta emitters Bq/L.
30
0.1
0.1
0.1
34.
Feccal coliform Counts/mL
0
0
0
0
35.
Protozoa
---
Nil
Nil
Nil
CPHEEO
- CENTRAL PUBLIC HEALTH & ENVIRONMENTAL ENGINEERING ORGANISATION
BIS
- BUREAU OF INDIAN STANDARDS
WHO
- WORLD HEALTH ORGANISATION
F/2, Karnatak Society, Mogul Lane, Mahim, Mumbai 400016. INDIA
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