Kathmandu’s flood exposes garbage crisis

It took the Great Flood of 28 September for the residents of Kathmandu to finally realise how much trash they were throwing into the Valley’s sacred rivers.

Even three weeks later, plastic bags wave like flags high up on the branches of trees at Teku and Sankhamul, reminding us of just how high the water level rose on that fateful day. There are pieces of cloth, styrofoam, plastic bottles and other garbage still strewn along the ruins of pavements and embankments.

This was the revenge of the rivers. The Bagmati, Vishnumati, Manohara, Nakkhu were getting back at city dwellers for treating the once sacred rivers as dumpsites. The rivers threw the trash right back where it came from.

"If we do not want such garbage being washed away during the monsoon, we should prioritise waste management. We should focus on every aspect of waste generation," says Shilashila Acharya of Avni Ventures, a recycling company in Kathmandu. “Dumping sites are often near the riversides. So, we might also want to rethink the locations of the dumping sites.”

Single-use plastic is the biggest source of trash in Kathmandu Valley which uses up an estimated 5,000,000 plastic bags a day. About 800 tons of this non-biodegradable material is dumped in the river, or in landfill sites every day. 

The thicker plastic of bottles and other discarded household items are collected by waste pickers for recycling, but plastic below 20 microns in thickness is thrown away after being used once to carry vegetables or other food purchases. One plastic bag takes 500 years to completely biodegrade, and microplastics contaminate drinking water and find its way into the human food chain.

Plastics thrown haphazardly into rivers can clog up drainage channels, harm the water cycle and poison aquatic species and wildlife. Waste collecting companies have realised that there is money in trash, and are doing good business recycling the plastic, but since thin plastic bags are not recycled it ends up being swept down the Bagmati to the plains.

“Cleaning campaigns are not enough. When we clean, we pick up the waste from one site and throw it off in another likely a landfill. This does not deal with the main problem of waste,” says Nabin Maharjan of Blue Waste to Value which recycles waste and turns them into sellable products such as cooking utensils. 

He adds: “But what we can do instead is pick the waste in a segregated form, reduce them to products and sell them. And that is how a circular economy can thrive. The government and local authorities should be involved.”

Nepal’s governments tried to ban polythene and single-use bags below 20 microns in thickness several times in the past, but these regulations were hastily withdrawn due to lobbying by importers of plastic pellets who have political connections.

Hanging from railings on the Bagmati banks, and swinging from trees at its confluence with the Vishnumati in Teku are at least seven types of plastic. The lowest grade are single use thin plastic bags which have to be banned at source.

But half-buried in the silt of the Bagmati’s floodplain are PET (polyethylene terephthalate) bottles, which can easily be recycled. Waste collectors do remove most of these and other types before they are dumped, but many do find their way into the river. Without extended producer responsibility, the Nepal government does not consider it mandatory to require manufacturers to ensure recycling.

“The first and foremost step of waste management starts is the segregation of biodegradable and non-biodegradable trash at source. Secondly, there should be more planned landfills within a community. While we prefer landfills to be away from the city, planned smaller landfills help better manage the waste of a community," adds Acharya.

"Third is the partnership that can exist between government authorities like Kathmandu municipalities with private organisation who are already working in waste management. This collaboration can help them better manage the waste," she says.

Kathmandu Valley produces an estimated 1,500 tons of waste every day, most of this ends up unsegregated at the landfill site at Banchare Danda of Nuwakot, after another site at Sisdole got filled up in 2022. Nearly 65% of it is still organic household waste, and can easily be turned into compost and does not have to end up at the landfill at all. 

Much of the paper, plastic bottles, metal and glass can also be recycled easily if they are segregated at source — as Mayor Balen Shah promised in his election campaigning. This could reduce the volume of garbage that has to be sent in fleets of tipper trucks every day to the landfill. 

Residents living near Banchare already suffer serious health risks from water contaminated with leachate from the dumpsite.

Says Nabin Maharjan: “We have to start working on minismising the waste generation. Until waste prevention is not taken seriously, this cycle of people throwing waste and people cleaning it up will never end.”