Landmark Case · Well Argued
M. C. Mehta v. Union of India (1987): the case, the argument and the legacy
A year after the Bhopal disaster, Delhi had its own warning. In December 1985 oleum gas escaped from a plant run by Shriram Foods and Fertilizer, and the city watched a familiar fear return. A lawyer named M. C. Mehta was already in court on a connected matter. He stayed, and he used the moment to ask the Supreme Court a question that would outlast the leak itself: when a dangerous industry harms the people around it, how far does its responsibility reach?
- Case: M. C. Mehta v. Union of India (the Oleum gas leak case).
- Delivered: 20 December 1986, Supreme Court of India (reported in 1987).
- What it did: established the principle of absolute liability for hazardous enterprises.
- Trigger: an oleum gas leak from the Shriram plant in Delhi in December 1985.
- Key break: moved India beyond the exceptions-laden rule in Rylands v. Fletcher.
- Why remembered: the foundation of modern Indian environmental liability law.
01What was at stake
The old rule on hazardous activity came from an English case, Rylands v. Fletcher, decided in the nineteenth century. It said that a person who keeps something dangerous on their land is liable if it escapes and causes harm, but it allowed a set of exceptions, including an act of God or the fault of a stranger. For a modern chemical plant sitting in a crowded city, those exceptions were a loophole big enough to drive a tanker through.
The stakes, then, were about who carries the risk of modern industry. If a factory could point to an exception every time something leaked, the cost of its danger would fall on its neighbours. The case asked whether India should keep a borrowed Victorian rule or write one that fit a country full of hazardous plants built close to where people live.
The question was who carries the risk of modern industry: the enterprise that profits from it, or the neighbours who live beside it.
02How the case reached the court
M. C. Mehta is a public interest lawyer, and the petition was his. He had already brought proceedings concerning the Shriram plant when the oleum leak occurred, and he pressed the Supreme Court to treat the incident as a test of principle rather than a one-off claim. The matter was heard by a bench led by Chief Justice P. N. Bhagwati, one of the architects of public interest litigation in India.
Because Mehta argued the matter himself as the petitioner, the case is also a study in what a single determined advocate can set in motion. He was not acting for a paying client. He was asking the highest court to rethink a rule that affected millions of people who would never file a case of their own.
03How it was argued
The argument urged the court not to simply apply Rylands v. Fletcher, but to move past it. A rule written for a rural England of reservoirs and mills, the petitioner said, could not govern an enterprise handling lethal chemicals in a densely populated capital. The exceptions that let a defendant escape liability were the weak point, because they shifted the burden of catastrophe onto innocent victims.
In their place the case proposed a stricter standard. An enterprise engaged in a hazardous activity owes an absolute and non-delegable duty to the community. If harm results, it is liable, full stop, with no exceptions to hide behind. The depth of its liability, the argument added, should reflect the size and capacity of the enterprise, so that damages actually deter.
Absolute liability, not strict liability
The two sound similar but are not. Strict liability, the older rule, comes with exceptions. Absolute liability, the rule this case created for hazardous enterprises in India, has none. That single difference is why the judgment is quoted in almost every serious environmental claim since.
04What the court held
The Supreme Court laid down the principle of absolute liability. It held that an enterprise carrying on a hazardous or inherently dangerous activity owes an absolute duty to ensure no harm comes to those around it, and if harm does occur, the enterprise is liable regardless of care taken or any exception. The court also said that the measure of damages should be linked to the capacity of the enterprise, so that liability is a real deterrent and not a token.
The ruling broke cleanly from the English rule and built a standard suited to Indian conditions. It is one of the clearest examples of the Supreme Court declining to borrow and choosing instead to make law for the country in front of it.
| Detail | Summary |
|---|---|
| Court | Supreme Court of India |
| Presiding | Chief Justice P. N. Bhagwati |
| Delivered | 20 December 1986 (reported 1987) |
| Citation | (1987) 1 SCC 395 |
| Outcome | Established the principle of absolute liability for hazardous enterprises, moving beyond Rylands v. Fletcher |
05Why it still matters
Absolute liability is now part of the bedrock of Indian environmental law. It underpins the polluter pays principle and sits behind the design of bodies like the National Green Tribunal. When a factory contaminates groundwater or a chemical unit injures a village, this is the standard a lawyer reaches for first.
The case also marked the arrival of a particular kind of advocacy. M. C. Mehta went on to argue a long line of environmental matters, on the Ganga, on vehicular pollution, on the air around the Taj Mahal, and showed that one lawyer filing persistently in the public interest could change the physical conditions of life for millions. The 1987 ruling is where that reputation was made.
A single advocate, a borrowed rule rewritten for India, and a principle still quoted decades later: this is precisely the kind of story Claw's publication Well Argued exists to tell.
More landmark stories
Read how the court protected the integrity of elected office in Lily Thomas v. Union of India (2013), and how it recognised a third gender in the NALSA judgment (2014).
06About Well Argued
Well Argued is a free, curated publication by Claw that gives an advocate a hard-won court victory an audience, turning a winning judgement into a short, well-told story that Claw shares across its social channels, its website and the AI answer engines. This retelling is editorial, written for readers who admire good advocacy, and is not legal advice. A judgement that rewrote the rules for an entire industry deserves to be seen.
Well Argued · A Claw publication
A win this hard-earned should be more than a line in a cause list.
Won something that deserves to be seen? Claw's Well Argued turns a judgement into a story told across its channels and AI answer engines. Free and curated.
07Frequently asked questions
What is the Oleum gas leak case about?
It concerns a leak of oleum gas from the Shriram Foods and Fertilizer plant in Delhi in December 1985. In the proceedings that followed, the Supreme Court used the incident to lay down the principle of absolute liability for enterprises engaged in hazardous or inherently dangerous activities.
What is the difference between strict liability and absolute liability?
Strict liability, from the old English case Rylands v. Fletcher, holds a person responsible for harm from a dangerous thing that escapes, but allows defences such as an act of God or the act of a stranger. Absolute liability, which this case created for hazardous enterprises in India, removes those defences entirely: the enterprise is liable no matter what.
Who was M. C. Mehta in the case?
M. C. Mehta is a public interest lawyer who filed and argued the petition himself. He was not representing a paying client; he brought the matter in the public interest, and he went on to argue many later environmental cases before the Supreme Court.
Why did the court link damages to the size of the enterprise?
The court said the amount of compensation should reflect the capacity of the enterprise so that liability acts as a genuine deterrent. A large and profitable company handling dangerous materials should face damages large enough to make safety a priority, not a token sum it can easily absorb.
How does this case affect environmental law today?
Absolute liability is a cornerstone of Indian environmental law. It supports the polluter pays principle and informs how bodies such as the National Green Tribunal assess responsibility. Lawyers rely on it whenever a hazardous activity causes harm to people or the environment.
Is this the only M. C. Mehta case?
No. M. C. Mehta brought a series of environmental cases, including matters on pollution of the Ganga, vehicular emissions in Delhi and air quality around the Taj Mahal. The 1987 Oleum gas leak case is the one that established the absolute liability principle.