Industries and large establishments must periodically test treated effluent and sewage against standards in their pollution consent, using laboratories recognised under the Environment (Protection) Act or NABL-accredited labs. Common parameters include pH, BOD, COD, TSS and oil and grease. Results support consent renewals and the annual environmental statement.
Common parameters
| Parameter | Indicates |
|---|---|
| BOD | Biodegradable organic load |
| COD | Total oxidisable load |
| TSS | Suspended solids |
| pH | Acidity |
Frequency
As specified in consent: monthly, quarterly or continuous online monitoring for large units.
Reporting
- Environmental statement annually
- Online data to CPCB/SPCB where mandated
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Frequently asked questions
Who needs online monitoring?
Highly polluting industry categories as directed by CPCB.
Are housing societies tested?
STPs in large complexes often have testing conditions.
Which lab should I use?
A lab recognised for environmental testing.
What is an environmental statement?
An annual report of environmental performance submitted to the SPCB.
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