|
Quality Control Standards Quality Control Standards |
|
| Recommended Raw Water Quality Criteria & Drinking Water Quality Standards and Frequency of Monitoring (2000 Version) |
| |
|
|
|
|
|
|
| |
RAW WATER |
DRINKING WATER |
| Parameter |
Recommended
Acceptable Value |
Frequency of Monitoring |
Standard |
Frequency of Monitoring |
| |
Treatment Plant Outlet |
Service Reservoir Outlet |
Distribution System |
| Microbiological: |
| Total Coliform |
5000 cfu/100 ml |
W |
MPN Method/Membrane Filtration Method :
Must not be detected in any 100 ml sample. |
W |
W |
W |
| E. Coli or Thermotolerant Coliform Bacteria |
- |
- |
Absent in 100 ml |
W |
W |
M |
| Faecal Striptococci |
- |
- |
Membrane Filter Method :
Absent in 100 ml sample
MPN Method :
<1 in 100 ml sample |
WN |
WN |
WN |
| Clostridium |
- |
- |
Absent |
WN |
WN |
WN |
| Viruses |
- |
- |
Absent in 100 ml |
WN |
WN |
WN |
| Protozoa |
- |
- |
Absent in 100 ml |
WN |
WN |
WN |
| Helminths |
- |
- |
Absent in 100 ml |
WN |
WN |
WN |
| |
| PHYSICAL - GROUP I: |
| Turbidity (NTU) |
1000 |
W |
5 |
W |
W |
M |
| Colour (Hazen) |
300 |
W |
15 |
W |
W |
M |
| pH (H ion) |
5.5-9.0 |
W |
6.5 - 9.0 |
W |
W |
M |
| Free Residual Chlorine |
- |
- |
not less than 0.2 |
W |
W |
M |
| Combine Residual Chlorine |
- |
- |
not less than 1.0 |
W |
W |
M |
| Monochloramine |
- |
- |
3 |
WN |
WN |
WN |
| |
| INORGANIC - GROUP II: |
| TDS at 105 - 110 C |
1500 |
M |
1000 |
M |
M |
Y/2 |
| Biochemical Oxygen Demand |
6 |
M |
- |
- |
- |
- |
| Chemical Oxygen Demand |
10 |
M |
- |
- |
- |
- |
| Chloride |
250 |
M |
2.50 |
M |
M |
Y/2 |
| Anionic Detergent MBAS |
1 |
M |
1 |
M |
M |
Y/2 |
| Ammonia (N) |
1.5 |
M |
1.5 |
M |
M |
Y/2 |
| Nitrate (N) |
10 |
M |
10 |
M |
M |
Y/2 |
| Total Nitrogen (N) |
1.0 |
M |
- |
- |
- |
- |
| Iron (Fe) |
1.0 |
M |
0.3 |
M |
M |
Y/2 |
| Fluoride (F) |
1.5 |
M |
0.4 - 0.6 |
M |
M |
Y/2 |
| Hardness |
500 |
M |
500 |
M |
M |
Y/2 |
| Aluminium (Al) |
- |
M |
0.2 |
M |
M |
Y/2 |
| Manganese (Mn) |
0.2 |
Y/4 |
0.1 |
M |
M |
Y/2 |
| |
|
|
|
