ERNAKULAM: Massive fish deaths in a Periyar river tributary were due to dangerous levels of ammonia, hydrogen sulphide and unidentified toxins in the water, said a report from the Kerala ...

KUFOS analysis finds high toxin level in Periyar river 5d • 1 min read KUFOS report disputes the Pollution Control Board’s finding that the fish death was due to low level of dissolved oxygen ...