These results are in agreement to Cong (1999) who
also observed similar values of conductivity, TDS and
hardness (303 - 517 µs cm-1, 152 - 249 mg L-1 & 130-173
mg L-1 CaCO3, respectively). High concentrations of these
parameters were observed at the ponds in wastewater
treatment system (Table I), because of the industrial
wastewater and the domestic wastewater drained into this
system bringing in both contaminated soil sediments and
ash from the burning of lignite coal, which introduce a lot of
unprecipitated suspended matter into the water. These soil
sediments and fly ash mainly comprised SiO2, which is a
major factor influencing growth of algae in many reservoirs
(Kanungo & Mohapatra, 2000; Pathan et al., 2003; Baba &
Kaya, 2004). There were statistical differences in the levels