Legacy Waste at Old Dumpsites: What the Law Requires

Legacy waste is the old, mixed municipal waste that has piled up for years at open dumpsites, often into mountains. The law puts the duty to deal with it on the local body. Under the Solid Waste Management Rules, old dumpsites must be assessed and cleared by biomining and bioremediation where that is feasible, and closed and scientifically capped where it is not, with the State Pollution Control Board monitoring. The separated fractions (combustible material, soil-like material, inerts and recyclables) must each go to a lawful destination. Residents can track the work through RTI, complain to the board and approach the NGT when deadlines slip or the reclaimed material is dumped elsewhere.

This guide is for residents living beside an old dumpsite, panchayats near land where the excavated material is being dumped, and anyone trying to understand why a garbage mountain has been 'under remediation' for years. It covers what legacy waste is, the legal duty to clear it, how biomining works, where each fraction may lawfully go, what to do about fires and leachate while work goes on, who pays, and how to hold the local body to its timeline.

It is part of our main page on garbage dumping, landfills and waste burning. If a dumpsite is still receiving fresh waste beside your home, read our guide on a landfill or dumping ground near your home as well.

The essentials

What is legacy waste and who has to clear it?

Legacy waste is municipal waste that was dumped in the open over years or decades without being processed, and has been sitting there since. It is a mixture of decomposed organic matter that now looks like soil, plastic and textiles, construction debris, glass, metal and stones, sometimes with hospital or industrial waste that should never have been there. Large cities have mountains of it, and almost every town has a smaller version on its outskirts.

The duty to deal with it rests on the local body: the municipal corporation, nagar palika or nagar panchayat, or a development authority or cantonment board that ran the site. The Solid Waste Management Rules, 2016 required local bodies to investigate old open dumpsites for their potential for biomining and bioremediation, to carry that out where feasible, and to cap the site scientifically where it was not. The 2026 Rules, in force from 1 April 2026, continue the duty to deal with old dumpsites; check the exact clauses and any deadlines in the current notification for your site.

The State Pollution Control Board monitors compliance and reports to the CPCB, which has issued guidelines on how legacy waste should be handled. The state's urban development department funds and supervises the local body, and the District Magistrate often coordinates when several departments are involved.

How biomining of legacy waste is supposed to work

Biomining is a plain mechanical process with a slightly grand name. The old waste is first treated in place with bio-cultures or by turning, to stabilise it and reduce smell and moisture (this is the bioremediation part). It is then excavated in layers, spread to dry, and passed through trommel screens and other separators that sort it by size and weight into fractions. Large stones and debris, plastics and textiles, metal and glass, and a fine soil-like material each come out separately.

Done well, biomining frees the land and stops the leachate and fires for good. Done badly, it moves the problem: the excavation itself releases smell and gas, the screening produces dust, and the fractions end up dumped somewhere else. Most of what goes wrong on these projects happens after the screening, not before it.

Where a site is too large, too deep or too close to homes to excavate safely, or where the waste is too contaminated, the alternative is closure: shaping the heap, covering it with a multi-layer cap, venting or collecting gas, collecting and treating leachate, and monitoring groundwater for years afterwards. A capped site is not a park on day one, and the rules expect post-closure care.

Each fraction from biomining, and where it may lawfully go

Ask the local body, through RTI, how many tonnes of each fraction have been produced and where each tonne went. The gaps in the answer are usually the complaint.

Where the reclaimed 'soil' goes is often the real violation

The soil-like fraction is the biggest by volume on most old sites, and the hardest to place. It looks like earth but can carry salts, fine plastic, heavy metals and pathogens. Guidelines allow it to be used only after testing and only in ways the authorities permit. In practice, contractors under pressure to clear tonnage quickly sometimes truck it to the nearest low-lying land, a village pond, a drain or a river floodplain, and call it 'filling'.

If trucks from a biomining site are tipping material near your village, photograph the trucks, their numbers and the material, and note where they came from. Complain to the State Board, the local body running the project and the DM, and ask for samples of the material to be tested. Filling a pond or wetland is a separate violation; see our guides on illegal filling of a lake or pond and floodplain rules. The same applies to the inert fraction, which overlaps with the problems in our guide on construction debris dumping.

Fires, smell and leachate during remediation

Remediation does not suspend the local body's duty to manage the site. While waste is being excavated, it must control dust, smell and the release of gas, keep a fire watch, collect leachate rather than letting it run into drains, and stop fresh waste being added. A biomining project at one end of a site while fresh trucks tip at the other end is a common and plainly unlawful pattern.

Excavation in summer is when fires are most likely, because disturbed waste exposes pockets of methane to air. Residents should ask for the project's dust and fire management plan, and complain at once when fires break out; our guide on garbage burning complaints covers how to record and report them. Excavated waste lying open during the monsoon produces large amounts of leachate, so ask how the contractor will handle the rains.

Remember the people working on the heap. Waste pickers have often lived off old dumpsites for years, and excavation exposes them, and the contractor's own workers, to gas, sharp objects and medical waste. Protective equipment, a bar on night picking near active excavation, and a plan for informal workers are part of running the project properly. A fatal accident on site quickly becomes a legal problem for the local body as well as a human one.

Who pays for clearing legacy waste?

The local body is responsible, but it rarely pays alone. Central funding under the Swachh Bharat Mission (Urban) 2.0 has supported legacy dumpsite remediation, and states add their own funds. Projects are usually tendered to contractors who are paid per tonne of waste processed, sometimes with extra payments for fractions sold.

Per-tonne payment creates an obvious risk: the quantity at the site can be overstated, and fractions can be dumped elsewhere instead of being taken to proper destinations at cost. That is why the quantity estimate in the project report (often from a drone or topographic survey), weighbridge records and the destination records matter. Residents and journalists who have compared these documents have exposed projects that paid for more waste than ever existed.

Where a local body fails to clear a site despite funds and deadlines, the NGT has imposed environmental compensation on it or on the state under the polluter pays principle, usually to be spent on remediation rather than paid to residents.

Old dumpsites in small towns and on riverbanks

Legacy waste is not only a big-city problem. Many small towns have spent decades tipping waste on a riverbank, at the edge of a nala, in an old brick-kiln pit or on panchayat land just outside the limits. These sites rarely make the news, have no project report and no contractor, and often nobody has even measured them. The duty under the waste rules applies to them all the same.

For these sites the first legal step is simply getting the local body to put something on paper: an assessment of the site, a decision between clearing and capping, and a date. A written complaint to the executive officer and the State Board, followed by an RTI asking what assessment has been done, often shows that none has. That reply is itself useful evidence if the matter later goes to the tribunal.

Riverbank sites are the most urgent, because every monsoon washes waste and leachate straight into the river. If the dump sits on a floodplain or beside a drain feeding a river, say so in the complaint and ask the board to sample the water downstream.

How residents can push a legacy waste site towards clearance

Questions to ask about any biomining project near you

Legal risks for local bodies and biomining contractors

Contractors and municipal engineers are increasingly on the other side of these complaints. The exposure is real: dumping fractions on unauthorised land can lead to directions from the board, environmental compensation, criminal complaints over illegal filling, and blacklisting under the contract. A fire on site can bring the tribunal's attention to the whole project.

The defence is paperwork. Keep weighbridge slips for every truck in and out, dispatch records for each fraction with the receiver's acknowledgment, test reports for soil-like material, agreements with cement plants and recyclers, and a site diary of fires, rain and inspections. When Advocate B.K. Singh is asked to defend a local body or contractor in a legacy waste matter, the first documents he asks for are the dispatch records for the fine fraction, because that is where the allegations almost always start.

What the NGT does in legacy waste cases

The NGT has supervised solid waste and legacy waste remediation across states for several years, asking states to report progress on old dumpsites and imposing environmental compensation where they fell behind. A resident's application about a particular site can draw on that body of directions, and the tribunal tends to ask the local body for a dated plan and the State Board for a verification report.

Typical directions are to stop fresh dumping, complete remediation within a set period, dispose of each fraction lawfully, control fires and leachate, and report compliance. If those directions are ignored, the remedy is an execution application rather than a fresh case; see our guide on NGT execution applications. Failure to comply with an NGT order is itself punishable under section 26 of the NGT Act.

What should happen to the land once it is cleared?

A cleared dumpsite is valuable land, and that brings its own disputes. The local body may want to use it for a waste processing plant, a park, a parking lot or commercial development. Residents who suffered the dump for years often want it kept green. The law does not fix a single use, but a few principles help.

First, 'cleared' should mean what the project report promised: excavation down to natural ground, with the base tested to show that contamination has not remained in the soil. Ask for the closure or completion report and the board's verification before accepting that a site is done. Second, if part of the site is capped rather than cleared, nothing heavy should be built on the cap, and gas and groundwater monitoring must continue. Third, any new facility on the land, such as a processing plant, needs its own authorisation and consent, and residents can raise objections on siting and design just as they could for a new site.

Ask also whether the master plan or zonal plan shows the land's future use. A change of use after clearance is a planning decision that can be questioned in the usual way.

How we help in legacy waste matters

• For residents and panchayats. We draft the RTIs that get the project report, quantities and dispatch records, read the replies, and prepare complaints that point to specific failures.
• Before the tribunal. We file applications for time-bound remediation and safe disposal of fractions, and respond to joint committee and board reports. See our page for communities and NGOs in environmental cases.
• For local bodies and contractors. We review compliance records, reply to board notices and represent them before the board and the NGT, through our waste management law practice.

Related guides

If the authorities simply will not act, see our guide on NGT cases against government inaction. For combustible fractions sent to incineration, read about waste-to-energy plant pollution.