|
|
SNo. |
Characteristic |
Tolerance
Limit |
|
|
|
Class A |
Class B |
Class C |
Class D |
Class E |
|
1 |
pH value |
6.5-8.5 |
6.5-8.5 |
6.5-8.5 |
6.5-8.5 |
6.5-8.5 |
|
2 |
Dissolved
Oxygen (mg/l), min. |
6 |
5 |
4 |
4 |
-- |
|
3 |
BOD (5-days at
20° C, mg/l, min. |
2 |
3 |
3 |
-- |
-- |
|
4 |
Total Coliform
Organism, MPN/100ml, max |
50 |
500 |
5000 |
-- |
-- |
|
5 |
Colour, Hazen
units, max. |
10 |
300 |
300 |
-- |
-- |
|
6 |
Odour |
10 |
300 |
300 |
-- |
-- |
|
7 |
Taste |
Tasteless |
-- |
-- |
-- |
-- |
|
8 |
Total
dissolved solids, mg/l, max. |
500 |
-- |
1500 |
-- |
2100 |
|
9 |
Total
hardness(as CaCo3), mg/l, max. |
300 |
-- |
-- |
-- |
-- |
|
10 |
Calcium
hardness (as CaCO3), mg/l, max. |
200 |
-- |
-- |
-- |
-- |
|
11 |
Magnesium
hardness (as CaCO3), mg/l, max. |
100 |
-- |
-- |
-- |
-- |
|
12 |
Copper (as
Cu), mg/l, max. |
1.5 |
-- |
1.5 |
-- |
-- |
|
13 |
Iron (as Fe),
Mg/l, max. |
0.3 |
-- |
0.5 |
-- |
-- |
|
14 |
Manganese (as
Mn), mg/l, max. |
0.5 |
-- |
-- |
-- |
-- |
|
15 |
Chlorides (as
Cl), mg/l, max. |
250 |
-- |
600 |
-- |
600 |
|
16 |
Sulphates (as
SO4), mg/l, max. |
400 |
-- |
400 |
-- |
1000 |
|
17 |
Nitrates (as
NO3), mg/l, max. |
20 |
-- |
50 |
-- |
-- |
|
18 |
Fluorides (as
F), mg/l, max. |
1.5 |
1.5 |
1.5 |
-- |
-- |
|
19 |
Phenolic
compounds (as C6H5 OH), mg/l, max. |
0.002 |
0.005 |
0.005 |
-- |
-- |
|
20 |
Mercury (as
Hg), mg/l, max. |
0.001 |
-- |
-- |
-- |
-- |
|
21 |
Cadmium (as Cd),
mg/l, max. |
0.01 |
-- |
0.01 |
-- |
-- |
|
22 |
Salenium (as
Se), mg/l, max. |
0.01 |
-- |
0.05 |
-- |
-- |
|
23 |
Arsenic (as
As), mg/l, max. |
0.05 |
0.2 |
0.2 |
-- |
-- |
|
24 |
Cyanide (as CN),
mg/l, max. |
0.05 |
0.05 |
0.05 |
-- |
-- |
|
25 |
Lead (as Pb),
mg/l, max. |
0.1 |
-- |
0.1 |
-- |
-- |
|
26 |
Zinc (as Zn),
mg/l, max. |
15 |
-- |
15 |
-- |
-- |
|
27 |
Chromium (as
Cr6+), mg/l, max. |
0.05 |
-- |
0.05 |
-- |
-- |
|
28 |
Anionic
detergents (as MBAS) mg/l, max. |
0.2 |
1 |
1 |
-- |
-- |
|
29 |
Polynuclear
aromatic hydrocarbons, (as PAH) |
0.2 |
-- |
-- |
-- |
-- |
|
30 |
Mineral oil,
mg/l, max. |
0.01 |
-- |
0.1 |
0.1 |
-- |
|
31 |
Barium (as Ba),
mg/l, max. |
1 |
-- |
-- |
-- |
-- |
|
32 |
Silver (as
Ag), mg/l, max. |
0.05 |
-- |
-- |
-- |
-- |
|
33 |
Pesticides |
Absent |
-- |
Absent |
-- |
-- |
|
34 |
Alpha
emitters, uC/ml, max. |
10-9 |
10-9 |
10-9 |
|
|
|
35 |
Beta emitters,
uC/ml, max. |
10-8 |
10-8 |
10-8 |
10-8 |
10-8 |
|
36 |
Free ammonia
(as N), mg/l, max. |
-- |
-- |
-- |
1.2 |
-- |
|
37 |
Electrical
conductance at 25° C, mhos, max. |
-- |
-- |
-- |
1000 x
10-6 |
2250 x 10-6 |
|
38 |
Free carbon
dioxide (as CO), mg/l, max. |
-- |
-- |
-- |
61 |
-- |
|
39 |
Sodium
absorption ratio |
-- |
-- |
-- |
-- |
26 |
|
40 |
Boron (as B),
mg/l, max. |
-- |
-- |
-- |
-- |
-- |
|
41 |
Percent
sodium, max. |
-- |
-- |
-- |
-- |
-- |
|
