Urban waste disposal

Topic: Geographical Issues: Pollution, Urban Waste, Slums and Land Degradation · NCERT: Class 12, Ch 9 "Geographical Perspective on Selected Issues and Problems"

Meaning

Urban waste disposal is how a town or city collects its garbage, where it takes it, and what finally happens to it: dumping, burial in a landfill, or treatment and reuse. It matters because uncollected or badly dumped waste spreads disease, releases methane, pollutes groundwater and locks up city land. Indian cities still leave a large share of their waste uncollected or untreated.

Explanation

Why cities make so much waste

• Indian cities are overcrowded and congested. Their services cannot keep up with the number of people.
• Sanitation (safe removal of human waste and garbage) is poor.
• More people living close together and using more goods means more garbage:
• the city cannot collect all of it
• it cannot treat what it does collect

• the rest piles up in the open

• Solid waste (also called refuse, garbage or rubbish) is old and used things that people throw away. Examples:

• rusted metal scrap, broken glass
• plastic containers and polythene bags

• ash, floppies and CDs

• Two sources:

• households
• industrial and commercial establishments (factories, shops, offices)

Where the waste goes (NCERT)

Type of waste	Where it is dumped
Household waste	On public land or on land owned by private contractors
Industrial waste	In municipal landfills in low-lying ground. The low ground slowly gets filled up with garbage.
Ash and debris (from industries, thermal power plants and building construction)	Dumped in the same way

• A landfill is land, often low ground, where waste is dumped and buried.
• Most Indian towns use open dumps:
• nothing stops dirty liquid from seeping into the soil
• nothing traps the gas that rises from the waste

What goes wrong when waste is not handled well

• The health chain:
• Waste lies in the open and gives off a very bad (obnoxious) smell.
• Flies and rodents (rats and mice) breed in it.
• They spread typhoid, diphtheria, diarrhoea, malaria and cholera.

• Wind and rain carry the waste to new areas, so the problem spreads.

• How methane forms:

• Untreated waste ferments slowly. Bacteria break it down where there is very little air.
• This releases methane, a strong greenhouse gas that also catches fire easily.

• The result is bad air nearby, dump fires and more global warming.

• Leachate:

• Rainwater seeps through the garbage and becomes a dark, toxic liquid.

• This liquid, called leachate, pollutes the groundwater and the soil.

• Legacy waste is old waste that has piled up at a dumpsite for years or decades without any treatment. It forms "garbage mountains". These heaps trap methane, catch fire in summer and leak leachate.

The better way: waste as a resource

• NCERT says waste should be treated as a resource, not as rubbish. It can give:
• energy, by burning the waste or turning it into gas

• compost (natural manure made from rotting kitchen and garden waste)

• Ragpickers are informal workers who collect and sort recyclable material from garbage without proper safety. They do much of the recycling in Indian cities but face serious health risks.

• Cleaning old dumps:
• Bio-mining means digging up an old dump and sorting it into soil-like material, recyclables and fuel, so the land can be used again.

• Bio-remediation means cleaning up a dump with biological methods such as microbes.

• Solid Waste Management Rules 2026 were notified on 27 January 2026 by the MoEFCC under the Environment (Protection) Act, 1986. They have been fully in force since 1 April 2026 and replace the SWM Rules 2016 [2].

• Four-stream segregation at source is now mandatory. "At source" means sorting waste at home or in the office, before it is collected [2]:
  • wet: kitchen, food and garden waste
  • dry: paper, plastic, metal, glass
  • sanitary: diapers and sanitary towels, which must be securely wrapped and kept separately
  • special care: items such as paint cans and bulbs
• Extended Bulk Waste Generator Responsibility (EBWGR): bulk waste generators (big housing societies, hotels and institutions) produce nearly 30% of all solid waste [2].
  • They must process wet waste on-site as far as possible.
  • If they cannot, they must get an EBWGR certificate [2].
• Only residual waste (waste that cannot be recycled or processed) may go to a landfill.
• Rule-breakers can be made to pay environmental compensation under the "polluter pays" idea.

Where it occurs

• The collection gap (NCERT):
• Metros such as Mumbai, Kolkata, Chennai and Bengaluru collect about 90% of their solid waste.
• Many other towns and cities leave 30–50% uncollected. It piles up on streets, open spaces and wasteland.

• Spatial pattern: big metros have money and machines. Smaller towns have weaker municipal bodies, so they miss a much larger share.

• Mahim, Mumbai (Maharashtra): the waste dump shown in NCERT Fig. 9.3.

• Legacy dumpsites:
• Ghazipur (East Delhi)
• Bhalswa (North Delhi)
• Okhla (South Delhi)

• Deonar (Mumbai, Maharashtra)

• Rajkot (Gujarat): cleared a decades-old dump with 16 lakh tonnes of legacy waste. The site is now a 20-acre urban forest [5].

• SBM-Urban 2.0 (Swachh Bharat Mission–Urban 2.0) runs across India's cities. It was launched in 2021 with the aim of "Garbage Free" cities [4].
• It targets 100% waste processing and the bio-remediation of legacy dumpsites [3].
• 2,478 dumpsites holding 25.06 crore MT of legacy waste were identified [3].

• By late 2025, 15.37 crore MT (61%) had been remediated, freeing 8,027 acres of land (53%) [3].

• Dumpsite Remediation Accelerator Programme (DRAP) began on 8 November 2025. It targets the top 214 dumpsites in 203 urban local bodies (ULBs) across 30 States/UTs. These sites hold nearly 80% of India's legacy waste [3].

• SWM Rules 2026 apply across India. The MoEFCC made them, and ULBs and bulk waste generators carry them out [2].

Don't confuse with

• SWM Rules 2016 vs SWM Rules 2026: the 2016 Rules had three streams (biodegradable, non-biodegradable, domestic hazardous). The 2026 Rules have four streams: wet, dry, sanitary and special care [2].
• Methane vs leachate: methane is a gas that forms when waste ferments without air. Leachate is a liquid that forms when rainwater seeps through garbage, and it pollutes groundwater.
• Bio-mining vs bio-remediation: bio-mining digs up and sorts an old dump into soil-like material, recyclables and fuel. Bio-remediation cleans a dump using living things such as microbes.
• Open dump vs landfill for residual waste: an open dump takes all waste, with no protection against leachate or gas. Under the 2026 Rules a landfill may take only residual waste that cannot be recycled or processed.

Prelims Hooks

• NCERT: Mumbai, Kolkata, Chennai and Bengaluru collect about 90% of their solid waste. Many other towns leave 30–50% uncollected.
• Dumpsite–city pairs: Ghazipur, Bhalswa and Okhla → Delhi. Deonar and Mahim (NCERT Fig. 9.3) → Mumbai.
• SWM Rules 2026: notified on 27 January 2026 under the Environment (Protection) Act, 1986, and in force since 1 April 2026 [2]. Trap: "hazardous" and "biodegradable" are not the names of the new streams.
• Paint cans and bulbs → special care waste. Diapers and sanitary towels → sanitary waste [2].
• EBWGR applies to bulk waste generators, who produce about 30% of solid waste [2].
• DRAP (8 November 2025) targets 214 dumpsites in 203 ULBs, which hold about 80% of legacy waste [3].

Mains Points

• Causes (GS-I, urbanisation):
• fast, unplanned growth of cities
• weak finances in smaller ULBs, which leaves 30–50% of waste uncollected
• no segregation at source

• dependence on open dumps in low-lying land

• Effects (GS-III, environment):

• vector-borne and water-borne diseases such as malaria and cholera
• methane emissions and dump fires that make city air worse
• leachate pollution of groundwater

• land locked up under 25.06 crore MT of legacy waste across 2,478 dumpsites [3]

• Policy response and the way forward:

• SBM-U 2.0 has remediated 61% of legacy waste [3].
• The SWM Rules 2026 bring four-stream segregation, EBWGR and landfill only for residual waste [2].
• Treat waste as a resource through compost and waste-to-energy.
• Bring ragpickers into the formal system with safety gear and fair pay.
• Copy remediation models like Rajkot's 20-acre urban forest [5].

Related concepts

• Solid waste
• Legacy waste
• Single-use plastic ban
• Extended producer responsibility
• E-waste
• Solid Waste Management Rules 2026

Read more

• Urban waste disposal and the new waste rules