Assessment of surface water quality in eight major ponds of Coimbatore city and potential risk on ground water quality.

Water samples were collected from eight different water tanks located in the Coimbatore city during the study period of six months. Major surface water quality parameters such as turbidity, temperature, pH, electrical conductivity, total dissolved solids, chlorides, hardness, COD, BOD, DO, alkalinity, Calcium, Sodium, Sodium Absorption Ratio and Potassium were analysed. It was observed that the water quality gets deteriorated due to the continuous discharge / entry of domestic / industrial wastewater into these tanks. It was noted that the concentrations of all parameters follow a rising trend of variation with the time. Measures for the minimisation of organic load and suspended solids loading are to be made. It is evident that the discharges of domestic and industrial sewage into these ponds cause the deterioration in the water quality over the period.

Physico-chemical characteristics and correlation, and regression study on ground water of Coimbatore north zone.

Ground water samples were collected from 18 wards of Coimbatore City north zone, among which 2 samples were collected from 2 different locations from each ward, total 36 samples: Water quality assessment was carried out for the parameters like temperature, odour, taste, colour, turbidity, pH, electrical conductivity, total dissolved solids, chlorides, hardness, alkalinity, calcium, sodium and potassium. Correlation coefficients were determined to identify the highly correlated and interrelated water quality parameters. Regression equations relating these identified correlated parameters were formulated. Comparison of observed and estimated values of the different parameters reveals that the regression equations developed in the study can be very well used for making water quality monitoring by observing the above said parameters alone. This provides an easy and rapid method of monitoring of water quality.