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WATER
QUALITY MONITORING NETWORK
1. NATIONAL WATER MONITORING PROGRAMME (NWMP)
Is a national programme sponsored by CPCB, Delhi.
The details regarding the monitoring stations are provided herein.
|
Monitoring stations |
Location |
Frequency of Sampling |
Parameters analysed on a
regular basis |
Parameters analysed(once
in a year) |
|
Surface Water |
i) Field Observation:
Weather, Colour & intensity, Odour, Visible effluent discharge,
human activities around station,
ii) Physico-chemical
& bacteriological
parameters:
Dissolved Oxygen, pH, Conductivity, Biological Oxygen Demand,
Nitrate Nitrogen, Nitrite Nitrogen, Total and Fecal Coliform
iii) Biomonitoring:
Saprobity Index, Diversity Index |
Turbidity, Alkalinity, Total Hardness, NH3-N, Kjeldahl-N,
Calcium, Magnesium, Potassium, Sodium, Sulphates, Phosphates,
COD, As, Zn, Cu, Cr, Cd, Pb, Fe, Ni, Flouride and Boron. |
|
Umtrew River |
Byrnihat |
Quaterly |
|
Kyrhukhla river |
Khliehriat |
Quaterly |
|
Umiam Lake |
Umiam |
Quaterly |
|
Ward's Lake |
Shillong |
Quaterly |
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Thadlaskein Lake |
Thadlaskein |
Quaterly |
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Myntdu River |
Jowai |
Quaterly |
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Ganol River |
Tura |
Quaterly |
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Simsang River |
Williamnagar |
Quaterly |
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Ground Water |
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Police Bazaar Spring |
Shillong |
Half Yearly |
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Mawpdang Spring |
Shillong |
Half Yearly |
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Wah U Dkhar |
Sohra |
Half Yearly |
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Umsahep Spring |
Shangpung |
Half Yearly |
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Narbong Well |
Byrnihat |
Half Yearly |
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2. ANALYSIS OF OTHER WATER SAMPLES
The Board is analysing the industrial waste water
collected from water polluting industrial unit located in the state.
The Board is extending support to other government departments,
private organizations, research organization by analyzing the water
samples received from them for the purpose of drinking,
construction, research works etc. The detail regarding the analysis
is provided herein:
|
Sl. No |
Source of Water |
Purpose |
Parameters Analysed |
|
1. |
Tap water,
Springs, Well, Reservoir, Raw and untreated water, Filtered
water, Deep Tube well, Drilled Underground water |
Drinking |
pH, Conductivity,
Chlorides, Alkalinity, Total Hardness, Fe, NO3, Total Coliform.
|
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2. |
Dug well, Drilling
Well, Ground water, River water |
Construction |
pH, TDS, TSS,
Total Hardness, Alkalinity, SO4, Cl-. |
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3. |
Industry |
Quality of
Industrial effluent |
Parameters
prescribed as per consent conditions. |
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4. |
Stream water,
river water, Dam river |
Research |
DO, BOD, COD,
Total Coliform, FC, PO4, pH, Turbidity, SO4, Heavy Metals, Cl-, Total Hardness, Ca, Mg. |
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5. |
River |
Consultancy |
Heavy Metals |
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6. |
Municipal dumping
ground |
Leachate Quality
of Municipal Dumping Ground |
pH, TDS, TSS, BOD,
COD, NH4, Total Kjeldahl Nitrogen, Cl-, Heavy Metals. |
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7. |
Central Pollution
Control Board |
Analytical Quality
Control |
Temperature, pH,
conductivity, Turbidity, Velocity of Flow, DO, BOD, Total
Kjeldahl Nitrogen, NO3, NO2, Total Coliform, Fecal Coliform,
Cl-, Hardness, Ca, Mg, Alkalinity, SO4, Na, COD, TDS, Fixed
dissolved solids, PO4, Boron. |
2.1 LIST OF PARAMETERS AND METHODS OF ANALYSIS
|
Sl. No |
Parameter |
Method of Analysis |
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1. |
Temperature |
Thermometric Method |
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2. |
pH |
Electrometric Method |
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3. |
Turbidity |
Nephlometric Method |
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4. |
Velocity of Flow |
1. Current Meter
2.
Float Method |
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5. |
Dissolved Oxygen |
Iodometric Method |
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6. |
Biochemical Oxygen Demand |
Dilution Method |
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7. |
Total Kjeldahl Nitrogen |
1. Digestion
2.
Distillation
3. Ammonia Estimation
i. Titration Method (>5mg)
ii. Nesslerization Method |
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8. |
Nitrogen Nitrate |
Phenol Di-Sulphonic Acid Method (Colorimetry) |
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9. |
Nitrogen Nitrate |
Naphyl Ethylenediamine Dihydrochloride Method
(Colorimetry) |
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10. |
Total Coliform |
Multiple Tube Dilution Technique |
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11. |
Fecal Coliform |
Multiple Tube Dilution Technique |
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12. |
Conductivity |
Conductometric Method |
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13. |
Chloride |
Argentometric Method |
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14. |
Hardness |
EDTA Titrimetric Method |
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15. |
Calcium |
EDTA Titrimetric Method |
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16. |
Magnesium |
By difference of 13 and 14 |
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17. |
Alkalinity |
i. Electrometric Method
ii.
Visual titration Method |
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18. |
Sulphate |
Turbidimetric Method |
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19. |
Sodium |
Flame Photometric Method |
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20. |
Chemical Oxygen Demand |
Dichromate Reflux Method |
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21. |
Total Suspended Solids,
Total Dissolved
Solids and
Fixed Dissolved Solids. |
Gravimetric Method |
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22. |
Phosphate |
Molybdate Method (Colorimetry) |
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23. |
Boron |
Curcumin Method (Colorimetry) |
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24. |
Heavy Metals |
Atomic Absorption Spectrometry Technique |
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25. |
Pesticides |
Gas Chromatography Technique |
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26. |
Potassium |
Flame Photometric Method |
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27. |
Flouride |
Ion Selective Electrode Method |
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28. |
Acidity |
Titrimetric Method |
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29. |
Total Organic Carbon |
Combustion Infrared Method |
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