Legacy Contamination in Business Acquisitions

When you buy a company in India, you buy its environmental history with it. In a share purchase the company stays the same legal person, so every old discharge, buried waste pit, unpaid compensation demand and pending NGT case remains its liability, now paid for with your money. In an asset or business purchase you can leave some of the past with the seller, but not the site itself: whoever controls a contaminated site can still be told to clean it up. The answer is not to avoid such deals but to find the problems, price them and allocate them in the contract.

This guide is for companies, investors and their advisers dealing with an Indian business that has, or may have, old pollution problems: a chemical or pharma company, a textile or tannery business, an engineering group with old plants, a power or cement asset. It covers how liability passes in different deal structures, the kinds of legacy claims that surface after closing, and the contract tools that work in practice. It belongs to our series on thermal power, industrial accidents and business risk.

If you are buying a single property rather than a business, start with our guide on environmental due diligence before buying an industrial site, which covers site checks and testing in detail. This page assumes those checks are being done and deals with what happens to the liability.

The essentials

Who is liable for old pollution after a company is sold?

The polluter is liable, and in a share purchase the polluter is the company you now own. A change in shareholding does not change the legal person that ran the plant, held the consents and discharged the effluent. So a groundwater contamination claim from neighbouring villages, an environmental compensation demand for violations three years ago, or an NGT application already pending all continue against the company. The sellers have their money; the company's balance sheet, which is now yours, pays.

In an asset purchase, business transfer or slump sale, the position is more nuanced. The buyer takes the land, plant and business, but the selling company continues to exist and remains liable for its own past offences and penalties. That is the theory. In practice, contamination on the site does not care who signed the conveyance. The new owner becomes the occupier, the board deals with whoever is running the plant, and the NGT, applying the polluter pays principle under Section 20 of the NGT Act, looks for someone able to pay for restoration. If the seller has been stripped of assets, that someone may be you.

Mergers sit at the share-deal end. A merger scheme normally transfers all assets and liabilities of the merging company, environmental ones included, to the surviving company. Buyers sometimes assume a merger cleans the slate. It does the opposite: it consolidates the history in one place.

How environmental liability moves in different deal structures

The table describes the usual position. The NGT decides its own procedure and applies the polluter pays principle with an eye on who can actually fund restoration, so contract labels do not bind it. They bind only the parties to the contract.

What kinds of legacy claims come up after closing?

The most common is groundwater. Contamination from old unlined lagoons, leaking effluent drains or buried sludge moves slowly with the groundwater and turns up in village borewells years later. When it does, residents complain to the State Board and often go to the NGT, which typically forms a joint committee to sample and report. The company that owns the site at that point is the respondent, whoever owned it when the waste went in. Our guide on proving groundwater contamination from industry shows how such cases are built.

Next is environmental compensation for past violations. Boards and the CPCB use a formula that multiplies, among other factors, the number of days a violation continued. An inspection after closing that finds an ETP was bypassed for two years, or a capacity expansion was never consented, can produce a demand covering that whole period. Our explainer on what environmental compensation means sets out how it is assessed.

Then there are the regulatory loose ends: production beyond consented capacity, expansion without an EC amendment, unfulfilled EC conditions, missing hazardous waste manifests, groundwater drawn without a NOC. These are cheaper to fix than contamination, but they sit on the company's record and resurface at consent renewal, during an inspection, or when a neighbour files an application. Finally, there are claims for off-site damage: a neighbour's crops, cattle or health.

The legal rules behind legacy liability

Finding legacy contamination before you sign

Business due diligence is wider than site due diligence. You are looking across every plant, warehouse and closed site the target has ever operated, including ones it sold or shut down years ago, because a company that owned a site when waste was dumped can still be pursued. Ask for a list of all current and former sites with dates and activities. Closed sites are where the surprises usually are.

For each material site, review the consent history, notices, compensation demands, NGT and High Court cases, and environmental statements. For sites with a risky history, commission soil and groundwater sampling, not just a document review. Read the target's accounts for contingent liabilities and provisions, and ask management directly about past spills, complaints from neighbours and visits from joint committees. Questions put in writing and answered in writing become part of the disclosure.

Do not overlook people. Long-serving plant managers, ETP operators and the safety officer often know where the old lagoon was or which year the incinerator stopped working. A short, structured interview with them can tell you more than a data room.

How to deal with legacy contamination in an acquisition

Putting a number on legacy contamination

Legacy risk is hard to price because it has three parts that behave differently. Clean-up cost depends on how far contamination has spread and what standard the board or the NGT will accept, and estimates often come as wide ranges. Compensation depends on how long a violation lasted and how many people were affected. Delay is the third cost: a plant that cannot get its consent renewed until an issue is resolved loses production, and that can dwarf the clean-up bill.

Ask consultants for a low, likely and high figure for each issue, with the assumptions written down, rather than a single number. Where the range is narrow, a price reduction is usually the cleanest answer. Where it is wide or depends on what a regulator decides later, an indemnity with escrow suits better, because neither side has to bet on the outcome.

When Advocate B.K. Singh advises on these negotiations, he looks first at what the regulator has already put in writing: an inspection report, a joint committee report, a direction with deadlines. Those documents fix the minimum the company will have to do, and they are the firmest ground for agreeing who pays for it.

Contract terms that actually protect a buyer

General warranties are a starting point. These are the terms that do the real work when legacy contamination is likely.

• Specific indemnity. A promise by the seller to pay for a named problem, such as contamination at a particular plant or a pending compensation demand, regardless of disclosure. It should not be cut down by the general cap, de minimis threshold or short survival period.
• Long survival period. Environmental claims surface slowly and NGT compensation applications can be filed up to 5 years after the cause of action. A 12 or 18 month claims window for environmental matters is usually too short.
• Escrow or holdback. Part of the price kept back and released only when remediation is signed off by the board, the demand is resolved, or the period expires without claims.
• Parent or promoter guarantee. If the selling entity will distribute the price and dissolve, its indemnity is worthless without a guarantee from someone who will still be there.
• Pre-closing remediation. The seller cleans up identified contamination, under the board's supervision, before completion, with completion conditional on it.
• Conduct of claims. Clear rules on who controls the defence of an NGT case or board proceedings, who appoints counsel and who can settle, with obligations to share information.
• Price adjustment. Where the risk is known and quantifiable, a lower price is often cleaner than an indemnity that will have to be fought over later.

Warranty and indemnity insurance is increasingly used in Indian deals, but policies commonly exclude known issues and often limit pollution cover. Read the exclusions before relying on it for environmental risk.

Can directors and managers be personally liable for old pollution?

Personal exposure turns on who was in charge when the offence happened, not who is in charge when it is discovered. Under the offences-by-companies provisions of the Water Act, Air Act and EP Act, the persons in charge of and responsible for the company's business at the time can be proceeded against unless they show lack of knowledge or due diligence. New directors appointed after closing are not liable for offences committed before they joined, but they become responsible for anything that continues on their watch.

That is the practical danger. A discharge that started under the old owners and is still happening after closing is a continuing violation, and the new management is now in charge of it. Advocate B.K. Singh's advice to incoming boards is to treat the first ninety days after closing as a compliance sprint: stop any ongoing violation, write to the board about what has been found and what is being done, and keep a record. A buyer who discovers a problem and acts on it is in a very different position from one who carries on. For prosecution risk, see our page on environmental prosecution defence.

If you are the seller

Sellers have their own reasons to deal with legacy issues before a sale. Disclosed problems can be priced and capped; problems discovered after closing become indemnity claims with interest and legal costs. Cleaning up a known site before marketing the business, regularising consents and closing out pending notices usually increases the price more than it costs.

Disclose fully and specifically. A vague line in the disclosure letter such as 'the company has historically had environmental issues' will not protect a seller against a specific indemnity claim, and may not protect against a warranty claim either. Attach the actual reports, notices and test results.

Think about the closed and sold sites too. If the company sold a site years ago with buried waste on it, the present owner of that site may come back to the company. A seller who knows of such a risk should either resolve it or negotiate a specific carve-out rather than hope it stays quiet.

Questions for the investment committee

The first year after closing

Most legacy disputes are won or lost in the first year. Bring consents and authorisations into line with what the plants actually do, and apply for amendments where capacity or products have changed. If the deal was an asset purchase, transfer consents, authorisations and the EC before operating; our guide on transfer of environmental clearance covers the last of these. Monitor groundwater at the sites flagged in due diligence so that any change is spotted early and can be compared with the baseline.

Calendar the indemnity deadlines. Claims under an SPA usually need written notice with reasonable detail within the survival period, and buyers lose valid claims because they waited for an NGT case to finish before notifying. Notify early and update as facts develop.

Listed buyers also have to think about disclosure. Material legacy liabilities may need to appear in financial statements and in sustainability reporting, and describing a contaminated business as 'green' invites a different kind of risk, which our guide on green claims and greenwashing risk discusses. Our ESG and BRSR advisory page covers reporting, and our corporate environmental lawyer page covers deal support.