A recent study conducted by researchers at the Cochin University of Science and Technology (Cusat) has raised serious concerns over increasing levels of microplastic pollution in Kochi’s urban drainage systems. Scientists warn that the contamination is becoming a growing environmental threat, especially to water bodies connected to the city’s canal network and the Vembanad Lake ecosystem.
According to the study, water samples collected from Kochi drains showed high concentrations of microplastic particles both before and after the monsoon season. Sediment samples recorded even higher levels of contamination, indicating that plastic waste continues to accumulate within the drainage network over time. Researchers found that densely populated areas such as the Perandoor-Thevara canal region and Mullassery canal were among the most affected zones.
The study identified several major sources contributing to the pollution, including:
- Improper plastic waste disposal
- Urban runoff during rainfall
- Vehicle tyre wear particles
- Lack of scientific drainage waste treatment systems
Experts warn that these microplastics eventually flow into the Vembanad Lake system, where they can enter aquatic ecosystems and the human food chain. Scientists have previously detected microplastics in fish samples from the Cochin estuary, raising long-term health concerns related to contaminated seafood and water sources.
Researchers also highlighted that microplastics can absorb and carry toxic chemicals, allowing pollutants to spread more easily through waterways. The absence of proper drainage waste treatment facilities in many Indian cities further worsens the problem.
Environmental experts are now calling for:
- Stronger plastic waste management
- Scientific drainage treatment systems
- Increased public awareness
- Better urban pollution control policies
The findings have intensified concerns about urban environmental pollution in Kochi, especially as rapid urbanization and rising plastic consumption continue to affect Kerala’s fragile water ecosystems.
News as reported
