Numeric criteria
Manvayal Permissible limits Observed value
pH 6.5-8.5 8
Temperature (0C) 10 24
Coliform Nil
Fluoride 1.0 (max) 1.5
Residual Chloride (mg/l) 0.2 0.2
Phosphorous (mg/l) 0.2
Iron (mg/l) 0.3 0.3
Hardness (mg/l) 300-600 120
Chlorides (mg/l) 250-1000 67.355
Ammonia 1.5 1
Turbidity(NTU) less than 5-10 10
Remark Soft water, with high fluoride content.
Threats
Wells dug in the wetland supply drinking water to the people. The use of pesticides in the fields could lead to the contamination of the water in the wells. Monitoring of the wetland for water quality and water level could be carried out.

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