Standards For Drinking Water
|
Substance Or Property
|
Maximum Acceptable
|
Maximum Allowable
|
|
Colour
|
5 (On Platinum Cobalt Scale)
|
50 (On Platinum Cobalt Scale)
|
|
Taste
|
Unobjectionable
|
-
|
|
Odour
|
Unobjectionable
|
|
|
Turbidity
|
5 units (on silica)
|
20 units
|
|
Temperature
|
10oC to 15.6oC
|
-
|
|
Total Solids
|
500 ppm
|
1500 ppm
|
|
Iron
|
0.3 ppm
|
1.0 ppm
|
|
Manganese
|
0.1 ppm
|
1.5 ppm
|
|
Copper
|
1.0 ppm
|
1.5 pm
|
|
Zinc
|
5
|
15
|
|
Calcium
|
75
|
200
|
|
Magnesium
|
50
|
150
|
|
Sulphate
|
200
|
400
|
|
Chloride
|
200
|
400
|
|
pH Range
|
7.0-8.5
|
6.5-9.2
|
|
Mag. & Sod. Sulphate
|
500
|
1000
|
|
Phenol
|
0.001
|
0.002
|
|
Carbon Chloroform Extract
|
0.2
|
0.5
|
|
Alkyl Benzyl Sulphonates
|
0.5
|
1.0
|
|
Pathogenic Bacteria
|
Nil
|
-
|
|
B-Coli Index
|
3
|
10
|
|
MPN
|
1 in 100 ml
|
-
|