Chloride content of the water samples was low in
rainy season. According to WHO, maximum permissible
limit for chloride is 500mg/l. The value observed in
present study is in the range of permissible limit
(Ravisankar & Poogothai, 2008) (Fig.3).
The sulphate content varies between150 to 230 mg/l
and the fluoride content varies between 0.8 to 1.4 mg/l.
The sulphate and fluoride values were also found to be
within the prescribed limits.
Total dissolved solids (TDS) is a measure of the
combined content of all inorganic and organic substances
contained in a liquid in molecular, ionized or micro
granular suspended form. The permissible limit of TDS of
drinking water is 500 mg/l (WHO, 2004). The observation
shows that the TDS is within the permissible range as
prescribed by WHO (2004).
The specific conductivity of water samples under
study varies between 750 to 900 µ mho/cm. The
maximum permissible limit of this parameter for drinking
water is 300µ mho/cm. However, the average specific
conductivity exceeds this limit because of its high values
during rainy season .In rainy season due to floods and
rains, water level in the well
increases, which contains
more electrolytes.