- Toxicity
Testing: For all toxic effluents, standard on toxicity is established by the
regulatory authorities and the effluents are monitored for compliance with standard
through toxicity test using fish, daphnia or other suitable organisms. Toxicity
tests are also performed for setting the standards for various industries as a
part of risk assessment.
- Early
Warning system: To warm the water supply authorities for sudden change in
water quality, and also to the industries for malfunctioning of their treatment
plant. This method is used in Western countries.
-
In-stream biomonitoring. This is a measurement of change in structural and
functional integrity of the aquatic ecosystem in response to pollution.
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