Premier national research institute report finds healthy marine ecosystem and strong biodiversity around Tata Chemicals Ltd’s Mithapur plant
A study by CSIR-Central Salt & Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, has found the marine ecosystem surrounding Tata Chemicals Limited’s (TCL) effluent discharge point at Mithapur to be healthy, stable, and productive. The findings indicate that the coastal ecosystem remains in good health, with water and sediment quality parameters staying within natural ranges. The area continues to support a rich variety of migratory and resident birds, thriving mangrove stands, and diverse plankton communities. The CSMCRI study found that decades of industrial operations and treated wastewater management have co-existed with the sensitive coastal environment, with local conditions governed predominantly by natural marine and tidal processes. The report’s diversity indices indicate healthy vegetation communities with no evidence of environmental degradation.
On seawater quality parameters, the report found that pH, salinity, dissolved oxygen and biochemical oxygen demand were within ranges typical of a healthy coastal marine environment. This assessment has been undertaken as part of the biennial monitoring requirements associated with the approval of the treated wastewater discharge pipeline project. Following field studies conducted by experts in December 2025 and May 2026, this is the first report submitted under the ongoing monitoring framework. The study, released in August 2026, examined water quality, sediment quality, marine biology, floral diversity, and avifauna across a 10 km radius of the discharge point in the Gulf of Kutch.
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