- Rampally Lake, among city's biggest, spat out 30,000 dead fish
- 2 other lakes also covered with dead fish earlier this month
- Activists blame pollution, government officials blame heat
10 days ago, two other lakes- Shamirpet and Medchal- were found packed with 60,000 dead fish, according to officials.
Government officials blame the crisis on the heat - Hyderabad has been averaging nearly 43 degrees - and on a bacterial infection across water bodies.
But environmental experts in the city say that the developments are not unexpected - after decades of being abused with a steady inflow of untreated sewage, industrial and agricultural chemicals, lakes are in oxygen distress, they claim.
"There is no system of collecting and disposing solid industrial waste. It is a failure of the pollution control board, so they prefer to blame the bacteria and infections instead,'' he alleged. Add to that the dumping of garbage in and around lakes and growing encroachments, he said.
"There is no outlet, so the dirty water just stays on. It does not get cleaned. Unless the dirty water is treated, the lake won't survive,'' he said.
Dr Reddy warns that infected or poisoned fish may already be reaching the markets to be consumed by customers.
"We need an independent agency like the Nagpur-based NEERI to investigate what is going so horribly wrong,'' Mr Reddy says.