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Tamil Nadu government in its affidavit before the Supreme Court, said that Karnataka by supplying treated sewage water to fill 126 tanks in Kolar district would expand its irrigation capacity in the guise of increasing the depleting groundwater table.
Tamil Nadu government further objecting to the Koramangala-Challaghatta (KC) valley project, where Karnataka is supplying treated water to lakes in Kolar district, said that as per the Supreme Court judgment on Cauvery delivered on February 16, 2018, the treated sewage generated from water supply to Bengaluru city has to flow back to Cauvery river.