The aquatic eco-toxicology division of the Karnataka State Pollution Control Board (KSPCB) has found a novel way of ascertaining the level of pollution in treated effluents released from industries-- using common carp, a species of fish. The test is being conducted using common carp to verify the ingredients chemicals' individual and combined effects on the environment, especially of those effluents released from pharmaceutical, tannery, pesticide, dying and textile industry where new chemicals are introduced.