Environmental Due Diligence Before Buying an Industrial Site

Before you buy an industrial plot, shed or running factory in India, find out three things: what the site was used for, what the pollution board and the NGT have on record about it, and what is in the soil and groundwater. Pollution laws attach to whoever occupies and controls a site, so once you take possession, old waste pits, contaminated groundwater and unpaid environmental compensation can become your problem. A proper check costs a fraction of the price and gives you a basis to negotiate, insist on clean-up or walk away.

This guide is for anyone buying or leasing industrial property: a plot in a state industrial estate, a shed vacated by a closed unit, a running factory with its consents, or agricultural land intended for a new plant. It covers what to check, where the information sits, how soil and groundwater testing works, and what the contract should say. It is part of our series on thermal power, industrial accidents and business risk.

If you are buying a company rather than a property, the liability questions change; read our guide on legacy contamination in business acquisitions as well. For a hands-on review of a specific site, see our environmental due diligence service.

The essentials

Why do I need environmental due diligence before buying an industrial site?

Because the law looks at who is in control of the site now, not only who caused the damage. The Water Act, the Air Act and the Environment (Protection) Act place duties on the 'occupier', the person in control of the premises. The Hazardous Waste Rules make the occupier responsible for waste on site. And the polluter pays principle, which the NGT applies under Section 20 of the NGT Act, has been used to make present owners pay for restoration where the original polluter has vanished or cannot pay.

In practice the risks come in three forms. First, physical contamination: buried sludge, leaking underground tanks, chromium or solvents in the groundwater, fly ash used as fill. Second, regulatory baggage: an expired consent, a closure direction, a pending environmental compensation demand, a prosecution, or a site named in an NGT order. Third, planning limits that stop you using the site as intended, such as a moratorium on new units in a polluted cluster or a groundwater NOC that will not be granted.

None of this shows up in a title search. A clean sale deed and a mutated khatauni tell you who owns the land, not what is under it or what the board thinks of it. That is why environmental checks need to run alongside the title and revenue checks, not after the agreement is signed. The same applies if you are taking a long lease rather than buying: a tenant in control of the premises is an occupier too.

What to check, where to find it, and what should worry you

What was this site used for before?

This is the single most useful question, and sellers often answer it vaguely. Ask for every consent order the site has held, because a consent order names the products, raw materials, effluent volume and waste streams. A shed now advertised as 'suitable for any light industry' may have run electroplating for fifteen years. If the seller has no records, the board may: an RTI application asking for consent orders, inspection reports and sample reports for the address is answerable within 30 days.

Walk the site with someone who knows what to look for. Stained floors, filled-in pits, a disused effluent channel, drums behind the boundary wall, odd patches where nothing grows, a recently concreted area with no obvious reason: each is a lead. Talk to neighbouring units and the estate association. Old satellite images, which are freely viewable, often show tanks, lagoons or dumps that have since been covered.

Agricultural or vacant land is not automatically clean. Low-lying plots near industrial areas are sometimes filled with fly ash, foundry sand or industrial waste because it is cheap fill. Our guide on fly ash dumping rules explains why ash fill draws regulatory attention, especially near water bodies.

Checking consents, notices and pending cases

If you are buying a running unit, read the current consent to operate line by line. It records the permitted products and capacity, effluent and emission limits, the treatment system, and specific conditions such as zero liquid discharge, online monitoring or a deadline to upgrade the ETP. Compare that with what the plant actually makes. Units that expanded without a consent amendment are common, and the buyer inherits the gap. Our guide on the difference between CTE and CTO explains what each covers.

Next, find every notice from the past few years. A show-cause notice that was answered and dropped is history. A closure or disconnection direction under Water Act s.33A or Air Act s.31A that was revoked on conditions, such as a bank guarantee or a deadline to install equipment, may still bind the site. An environmental compensation demand that was never paid does not disappear when ownership changes; the board will look to whoever is operating.

Search the NGT and the High Court for cases naming the unit, the owner or the industrial area. Clusters that CPCB's pollution index (CEPI) has listed as critically polluted have at times faced moratoriums on new or expanded units, and some NGT orders cover a whole estate or river stretch rather than one factory. If the site sits in such a cluster, find out what the current restrictions are before assuming you can expand.

Do I need a soil and groundwater test before buying factory land?

For any site with a history of manufacturing, yes. A desk review and site walk (often called a Phase 1 assessment) tells you where contamination is likely. Sampling (a Phase 2 assessment) tells you whether it is there. A consultant drills or digs at the spots most likely to be affected: around the old ETP, sludge drying beds, drum and chemical stores, underground and above-ground tanks, effluent drains, the boundary nearest the drain, and any borewell on site.

What to test for depends on what the site made. Plating and tanning point to chromium and other heavy metals; fuel storage to petroleum hydrocarbons; pharma and chemical units to solvents; battery work to lead. Use a laboratory recognised under the EP Act or accredited for those tests, and ask for a chain-of-custody record showing who collected each sample, when and where. Results without a sampling plan and a map are of little use in a negotiation and none in a dispute.

Interpreting results needs care. India does not have a full set of notified soil clean-up standards for every land use, so consultants often compare results with CPCB guidance and international screening values. The question for you is practical: is the contamination limited and removable, is it spreading into groundwater used by neighbours, and what would remediation cost and take? Our guide on who pays to clean up contaminated industrial land covers the liability side.

How to run environmental due diligence on an industrial site

Documents to ask the seller for

Can I take over the seller's consent and clearances?

Not automatically. Consents under the Water and Air Acts and authorisations under the waste rules are granted to a named occupier for specified premises. When ownership or control changes, the board has to be told and the consent transferred or re-issued in the new name, following the board's own procedure. Until that happens you are operating on someone else's permission, and a board inspection can treat the unit as running without consent.

Environmental clearance under the EIA Notification 2006 can be transferred during its validity on an application, with the new owner accepting the same conditions. Our guide on transferring an environmental clearance explains the process. Accepting the conditions means accepting any breaches too: if the old owner never built the green belt or the rainwater harvesting the EC required, that shortfall comes with the project.

Look at what is physically left behind as well. Drums of spent solvent, bags of ETP sludge or old raw chemicals in a store are hazardous waste once the business stops using them, and the person in control of the premises has to send them to an authorised facility with manifests. If the seller leaves them, you pay to remove them and you answer to the board if they leak. Make removal, with TSDF receipts, part of the handover.

Groundwater is a frequent stumbling block. If the site is in a block classed as over-exploited, a fresh or enlarged NOC may be hard to get, and an industry that needs a lot of water may not be viable there. Check this before you agree a price, using our guide on groundwater extraction rules in over-exploited areas.

Location limits that can stop your plans

Some sites cannot be used as intended whatever the paperwork says. A plot inside an eco-sensitive zone around a sanctuary or national park faces restrictions on certain industries; see our guide on eco-sensitive zone rules. Coastal land falls under the CRZ Notification 2019, river floodplains are often under court or state restrictions, and notified wetlands carry their own prohibitions under the Wetlands Rules 2017.

Then there is the industry category. Red category units, the most polluting, face the tightest siting conditions and some estates or zones exclude them entirely. If you are moving from orange to red because of a new process, the site that was fine for the seller may not be fine for you. The page on red, orange, green and white industry categories explains the classification. Stone crushers, hot mix plants and brick kilns also have state siting norms, so check your state's current rules.

What the purchase agreement should say

Findings only protect you if the contract uses them. At minimum, the seller should warrant that the documents disclosed are complete, that there are no undisclosed notices, demands or cases, and that no hazardous waste has been disposed of on the site except as disclosed. Where a specific problem has been found, a general warranty is not enough: you need a specific indemnity for that problem, without a low cap or short time limit, because NGT compensation claims can be brought up to 5 years after the cause of action first arose.

Money held back is better than a promise. A holdback or escrow released only when the board confirms clean-up, or when the consent is transferred, keeps the seller engaged. Make consent transfer, revocation of any pending closure direction and clearance of compensation dues conditions of completion where you can.

When Advocate B.K. Singh reviews an industrial site purchase, he insists on a baseline report attached to the deed: a dated record of soil and groundwater conditions on the day possession passes. Years later, when a neighbour's borewell tests positive or the board inspects, that document is often the only way to show which contamination came before you and which did not.

Deal-breaker questions before you sign

Mistakes buyers make

The commonest is treating environmental checks as a formality to finish after the price is agreed, when the findings can no longer change the deal. Close behind is relying on a seller's 'no objection' letter from the board that turns out to be years old or limited to one issue. Buyers also skip sampling to save a few weeks, then discover contamination when they dig foundations for a new line.

Another is assuming the estate authority's transfer approval covers the environment. It does not; the industrial development corporation and the pollution board are separate, and one's approval says nothing about the other's file. Finally, buyers sometimes start operating the day after possession without transferring the consent. Advocate B.K. Singh's advice to buyers is simple: until the consent is in your name, run nothing that discharges or emits.

For a wider compliance health check after you take over, see our environmental compliance audit page. Our guide on CETP compliance is worth reading if the unit sends effluent to a common plant, since unpaid CETP dues and non-compliance often travel with the site.