• The unchecked flow of untreated industrial effluent into rivers in Gujarat has led to increasing pollution in the Sabarmati, Mahisagar, Narmada, Vishwamitri and Bhadar.
• According to data from the Ministry of Environment and Forest (MoEF), the Sabarmati is among the most polluted rivers in the country.

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• He said that both treated and untreated effluent is released into the estuary of the Mahisagar and Gulf of Cambay, flouting the guidelines of the Central Pollution Control Board (CPCB).
• As per the official parameters, if the chemical oxygen demand (COD), which indicates organic pollutant load, is higher than 250 mg per litre, then it should not be released into the rivers.