Numeric criteria
Thalaikundha (DW) Permissible limits Observed value
pH 6.5-8.5 5.9
Temperature (0C) 10 20
Coliform Nil yes
Fluoride 1.0 (max) 0.6
Residual Chloride (mg/l) 0.2 <0.2 Phosphorous (mg/l) 0.1 Iron (mg/l) 0.3 3 Hardness (mg/l) 300-600 400 Chlorides (mg/l) 250-1000 no color chande Ammonia 1.5 1 Turbidity(NTU) less than 5-10 10 Remark very hard water,low fluoride content