Archive · 31 Oct 2025
Plastic Waste Clogs Kolkata Drainage Systems Amidst Rainfall Fears
Imagine Kolkata's city has a big underground system to carry away rainwater when it pours.
But, people throw a lot of plastic trash on the streets.
This plastic gets washed into the drains with the rain.
It's like when too many toys get flushed down a bathtub drain and it gets blocked!
The plastic piles up in special pumping stations that help move the water.
Sometimes, so much plastic gets stuck that officials have to remove it with trucks.
They have screens to catch the plastic before it reaches the pumps, but the amount of trash is overwhelming.
Even when it's not raining, plastic still gets into the drains.
This can stop the pumps from working, which is a big problem.
A lot of the city's trash, especially plastic, doesn't even make it to the places where it's supposed to be thrown away, so it ends up in drains and rivers instead.
Kolkata's drainage pumping stations were overwhelmed with plastic waste during heavy rainfall on September 23.
Officials had to remove multiple truckloads of plastic from stations like Palmer Bazar and Thanthania.
Screens are in place at pumping stations to prevent plastic from damaging pumps, but they frequently get clogged.
Approximately 280 tonnes of plastic waste are generated daily in Kolkata, with a significant portion not reaching disposal sites.
Concerns were raised about potential re-choking of drainage systems due to plastic waste ahead of Cyclone Montha's forecast.
- Who
- Kolkata Municipal Corporation (KMC) officials and engineers
- What
- Plastic waste clogging drainage pumping stations and sewer networks.
- When
- During heavy rainfall on September 23, and with concerns raised again due to Cyclone Montha forecast.
- Where
- Kolkata, specifically at drainage pumping stations like Palmer Bazar, Ballygunge, and Thanthania.
- Why
- A significant amount of plastic waste generated daily enters the city's drainage system instead of being properly disposed of, leading to blockages.
- Daily Waste Generated in Kolkata
- Approx. 4,500 tonnes
- Daily Plastic Waste Generated in Kolkata
- Approx. 280 tonnes
- Plastic Waste Reaching Dhapa Disposal
- Approx. 200 tonnes
- Date of Major Rainfall and Choking Incident
- September 23
- Amount of Rain on September 23
- 252mm in five hours
- Plastic Removed from Palmer Bazar Pumping Station
- Four truckloads