CHARACTERISTICS OF DRINKING WATER SUPPLIED TO CHENNAI CITY – JAN -2003
|
Parameter |
Average
Results |
Drinking
water Permissible
Limit BIS:10500-1991 |
|
Colour |
Slightly
whitish |
25
Units |
|
Odour |
Chlorinous |
Unobjectionable |
|
Turbidity (NTU) |
5 |
10 |
|
Total Dissolved Solids
(mg/L) |
225 |
2000 |
|
Total Hardness (mg/L)
( as CaCO3 ) |
105 |
600 |
|
Calcium
(mg/L) (as Ca) |
24 |
200 |
|
Magnesium
(mg/L) (as Mg) |
11 |
- |
|
Chloride
(mg/L) (as Cl ) |
56 |
1000 |
|
Sulphate
(mg/L)
(as SO4 ) |
30 |
400 |
|
Ammoniacal Nitrogen
(mg/L)
(as N ) |
0.02 |
- |
|
Albuminoid Nitrogen
(mg/L) (as N ) |
0.13 |
- |
|
Nitrite
(mg/L) (as N ) |
Nil |
- |
|
Nitrate
(mg/L) (as NO3 ) |
Nil |
100 |
|
Phenolphthalein Alkalinity (mg/L)
( as CaCO3 ) |
Nil |
- |
|
Total
Alkalinity (mg/L) ( as CaCO3 ) |
86 |
600 |
|
Phosphates
(mg/L)
(as PO4 ) |
0.01 |
- |
|
Iron (mg/L)
(as Fe ) |
0.15 |
1.0 |
|
pH |
7.3 |
6.5
- 8.5 |
|
Silicates
(mg/L)
(as SiO2 ) |
10 |
- |
|
Fluoride
(mg/L)
(as F ) |
0.10 |
1.5 |
|
Specific
conductance (micro mhos/cm) |
350 |
- |
CHARACTERISTICS OF
DRINKING WATER SUPPLIED TO CHENNAI
CITY – FEB -2003
|
Parameter |
Average
Results |
Drinking
water Permissible
Limit BIS:10500-1991 |
|
Colour |
Colourless |
25 Units |
|
Odour |
Chlorinous |
Unobjectionable |
|
Turbidity (NTU) |
5 |
10 |
|
Total Dissolved Solids
(mg/L) |
235 |
2000 |
|
Total Hardness (mg/L)
( as CaCO3 ) |
98 |
600 |
|
Calcium
(mg/L) (as Ca) |
23 |
200 |
|
Magnesium
(mg/L) (as Mg) |
10 |
- |
|
Chloride
(mg/L) (as Cl ) |
51 |
1000 |
|
Sulphate
(mg/L)
(as SO4 ) |
27 |
400 |
|
Ammoniacal Nitrogen
(mg/L)
(as N ) |
0.02 |
- |
|
Albuminoid Nitrogen
(mg/L) (as N ) |
0.02 |
- |
|
Nitrite
(mg/L) (as N ) |
Nil |
- |
|
Nitrate
(mg/L) (as NO3 ) |
Nil |
100 |
|
Phenolphthalein Alkalinity (mg/L)
( as CaCO3 ) |
Nil |
- |
|
Total
Alkalinity (mg/L) ( as CaCO3 ) |
81 |
600 |
|
Phosphates
(mg/L)
(as PO4 ) |
0.01 |
- |
|
Iron (mg/L)
(as Fe ) |
0.15 |
1.0 |
|
pH |
7.1 |
6.5
- 8.5 |
|
Silicates
(mg/L)
(as SiO2 ) |
10 |
- |
|
Fluoride
(mg/L)
(as F ) |
0.10 |
1.5 |
|
Specific
conductance (micro mhos/cm) |
360 |
- |
CHARACTERISTICS OF DRINKING WATER SUPPLIED TO CHENNAI CITY – MAR -2003
|
Parameter |
Average
Results |
Drinking
water Permissible
Limit BIS:10500-1991 |
|
Colour |
Colourless |
25
Units |
|
Odour |
Chlorinous |
Unobjectionable |
|
Turbidity (NTU) |
5 |
10 |
|
Total Dissolved Solids
(mg/L) |
235 |
2000 |
|
Total Hardness (mg/L)
( as CaCO3 ) |
97 |
600 |
|
Calcium
(mg/L) (as Ca) |
22 |
200 |
|
Magnesium
(mg/L) (as Mg) |
10 |
- |
|
Chloride
(mg/L) (as Cl ) |
49 |
1000 |
|
Sulphate
(mg/L)
(as SO4 ) |
26 |
400 |
|
Ammoniacal Nitrogen
(mg/L)
(as N ) |
0.03 |
- |
|
Albuminoid Nitrogen
(mg/L) (as N ) |
0.09 |
- |
|
Nitrite
(mg/L) (as N ) |
Nil |
- |
|
Nitrate
(mg/L) (as NO3 ) |
Nil |
100 |
|
Phenolphthalein Alkalinity (mg/L)
( as CaCO3 ) |
Nil |
- |
|
Total
Alkalinity (mg/L) ( as CaCO3 ) |
85 |
600 |
|
Phosphates
(mg/L)
(as PO4 ) |
0.01 |
- |
|
Iron (mg/L)
(as Fe ) |
0.10 |
1.0 |
|
pH |
7.3 |
6.5
- 8.5 |
|
Silicates
(mg/L)
(as SiO2 ) |
10 |
- |
|
Fluoride
(mg/L)
(as F ) |
0.10 |
1.5 |
|
Specific
conductance (micro mhos/cm) |
360 |
- |
CHARACTERISTICS OF
DRINKING WATER SUPPLIED TO CHENNAI
CITY – APR -2003
|
Parameter |
Average
Results |
Drinking
water Permissible
Limit BIS:10500-1991 |
|
Colour |
Colourless |
25
Units |
|
Odour |
Chlorinous |
Unobjectionable |
|
Turbidity (NTU) |
4 |
10 |
|
Total Dissolved Solids
(mg/L) |
235 |
2000 |
|
Total Hardness (mg/L)
( as CaCO3 ) |
93 |
600 |
|
Calcium
(mg/L) (as Ca) |
23 |
200 |
|
Magnesium
(mg/L) (as Mg) |
10 |
- |
|
Chloride
(mg/L) (as Cl ) |
51 |
1000 |
|
Sulphate
(mg/L)
(as SO4 ) |
24 |
400 |
|
Ammoniacal Nitrogen
(mg/L)
(as N ) |
0.02 |
- |
|
Albuminoid
Nitrogen (mg/L) (as N ) |
0.07 |
- |
|
Nitrite
(mg/L) (as N ) |
Nil |
- |
|
Nitrate
(mg/L) (as NO3 ) |
Nil |
100 |
|
Phenolphthalein Alkalinity (mg/L)
( as CaCO3 ) |
Nil |
- |
|
Total
Alkalinity (mg/L) ( as CaCO3 ) |
82 |
600 |
|
Phosphates
(mg/L)
(as PO4 ) |
0.01 |
- |
|
Iron (mg/L)
(as Fe ) |
0.10 |
1.0 |
|
pH |
7.2 |
6.5
- 8.5 |
|
Silicates
(mg/L)
(as SiO2 ) |
10 |
- |
|
Fluoride
(mg/L)
(as F ) |
0.10 |
1.5 |
|
Specific
conductance (micro mhos/cm) |
365 |
- |
CHARACTERISTICS OF DRINKING WATER SUPPLIED TO CHENNAI CITY – MAY -2003
|
Parameter |
Average
Results |
Drinking
water Permissible
Limit BIS:10500-1991 |
|
Colour |