A recent analysis under the National Water Quality Monitoring Programme has revealed alarming levels of faecal contamination in six major rivers across Kerala, with some stretches exceeding safety limits by hundreds of times.
- Six major rivers—Karamana, Periyar, Kadambrayar, Chitrapuzha, Chalakudy, and Kallai—show extreme levels of faecal contamination.
- The Chitrapuzha river recorded a massive spike of 5.5 lakh MPN per 100 ml, far exceeding the safe limit.
- Experts attribute the crisis to the unchecked discharge of untreated domestic and industrial sewage into water bodies.
The ecological health of Kerala's vital river systems is under severe threat. According to a recent analysis conducted as part of the National Water Quality Monitoring Programme by the Central Pollution Control Board (CPCB), alarming levels of faecal contamination have been detected in several monitoring stations across the state.
The study, covering the period from February to May 2026, highlights that the total coliform count—a key indicator of faecal contamination—in the Karamana, Periyar, Kadambrayar, Chitrapuzha, Chalakudy, and Kallai rivers varied between 4,500 MPN and a staggering 5.5 lakh MPN per 100 ml. For context, the CPCB prescribes a maximum permissible limit of less than 2,500 MPN per 100 ml for bathing water.
Detailed Pollution Breakdown
The data reveals a grim picture of water quality across different stretches. The Chitrapuzha river at the Irumpanam stretch recorded the highest-ever count of 5.5 lakh MPN/100 ml. In the Periyar river, significant spikes were noted at the Eloor and Aluva stations, while the Pathalam area near the Edayar industrial zone showed a count of 2.5 lakh MPN/100 ml.
| River Name | Max Coliform Count (MPN/100ml) | Status |
|---|---|---|
| Chitrapuzha (Irumpanam) | 5,50,000 | Critical |
| Kallai River | 2,00,000 | Severe |
| Periyar (Pathalam) | 2,50,000 | Severe |
| Karamana (Moonattumukku) | 27,000 | High Risk |
Why This Matters
BozokMedia analysis shows that this surge in bacterial contamination is not merely a statistical anomaly but a direct threat to the socio-economic and biological fabric of Kerala. High coliform levels indicate the presence of human and animal waste, significantly increasing the risk of waterborne diseases like cholera, typhoid, and dysentery for communities relying on these rivers.
The release of domestic effluents from households and townships through drains is the primary driver of this rising faecal contamination.
V. Sivanandan Achari, Dean at the School of Environmental Studies, CUSAT, emphasized that the lack of proper sewage management and the direct discharge of untreated wastewater into rivers are the root causes. In response, officials from the Department of Local Self-Government have instructed civic bodies to take stringent action against illegal waste discharge.
Historical Background
Kerala's river systems have historically been the backbone of its agricultural and domestic life. However, rapid urbanization and inadequate expansion of sewage treatment infrastructure have turned these lifelines into conduits for waste, leading to a recurring cycle of environmental degradation.
Frequently Asked Questions
Question 1: What is the safe limit for coliform in water?
Answer: According to CPCB, the limit for bathing water should be below 2,500 MPN per 100 ml.
Question 2: Which river is the most polluted according to the report?
Answer: The Chitrapuzha river recorded the highest contamination level at 5.5 lakh MPN/100 ml.
