Study flags E. coli in 67% of water samples in Keralam’s Pala region

A water quality assessment conducted in flood-affected areas along the Meenachil river has detected E. coli bacteria in 67% of the samples, raising concerns over the safety of drinking water sources in and around Pala.

The study, conducted by the PG and Research Department of Zoology of Alphonsa College, Pala, in collaboration with local administrations, analysed water samples collected from water bodies in Pala Municipality, Karoor, Bharananganam, Erattupetta, Poonjar, Mutholy and Kidangoor. The assessment was undertaken as part of efforts to mitigate the risk of waterborne diseases in flood-affected areas.

The study evaluated nine physicochemical and microbiological parameters, including pH, electrical conductivity (EC), total dissolved solids (TDS), alkalinity, chlorinity, total hardness, sulphate, faecal coliform and E. coli.

The findings showed that TDS and pH levels exceeded the normal permissible range in the samples tested. E. coli was detected in 67% of the samples, with researchers attributing the spike in bacterial contamination to the recent floods, which may have allowed contaminated surface water to enter water sources.

The assessment has recommended scientific chlorination of water sources and mandatory water quality testing after every flood as key remedial measures. The recommendations have been shared with local stakeholders for follow-up action.

The report, along with the recommendations, was handed over to the Pala municipality at a function attended by Water Resources Minister Mons Joseph the other day.

Meanwhile, the college has launched a one-year pilot study to track seasonal variations in water quality during the pre-monsoon, monsoon and post-monsoon periods. The study is expected to provide a broader assessment of changes in water quality across the region.

The college has also initiated steps to transform its research laboratory into a certified facility, with efforts under way to secure recognition from the Kerala State Pollution Control Board.