Water Quality Deterioration Risks Crops at Kelavarapalli Irrigation Hub
The South Pennai River, which feeds the Kelavarapalli Dam, is currently plagued by a persistent layer of toxic foam that threatens the irrigation water used by farmers in Krishnagiri district. The foam has been present for over a month, with its spread accelerating after recent rains in Karnataka increased the dam’s outflow.
Farmers fear that the sudden decline in water quality could have a cascading impact on crop health, soil fertility and overall farm productivity. The Kelavarapalli reservoir supports irrigation for thousands of acres, and any long‑term contamination could diminish the command area’s capacity to sustain agricultural activities.
According to farmer representatives, the primary source of the pollution is untreated sewage discharged upstream from Karnataka’s urban centers. They also point to possible contributions from industrial units located along the riverbank, urging a comprehensive inspection of factories, mills and any other waste‑water outlets.
The agricultural unions plan to meet with officials from the Water Resources Department, requesting a swift, coordinated action plan that includes both Tamil Nadu and Karnataka authorities. They have called for scientific assessments to identify exact pollution sources and for stringent measures to block untreated waste from entering the river.
Preliminary monitoring data show elevated levels of sulfates and phosphates—indicators typically linked to sewage rather than industrial chemicals. Dissolved oxygen measurements have fallen below one milligram per litre, signifying severe degradation that endangers fish and other aquatic life.
Water samples continue to be collected daily and are being analysed in laboratories at Chennai and Pollachi. The Tamil Nadu Pollution Control Board is also conducting independent sampling to corroborate findings.
Farmers are pressing for expedited investigations and the implementation of long‑term solutions. They warn that if the South Pennai River’s condition worsens, the region could face a serious threat to agricultural output, biodiversity and public health.