Plant logs and Tank 610
Document
UCIL operating records and later expert reports establish an MIC release from a named tank. Safeguard status is part of that paper.
Tank records, ICMR studies, the 1989 orders and the 2010 judgments that define a mixed industrial case.
Darker cells mean a higher score for this topic on that metric.
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Methyl isocyanate from a storage tank at the UCIL pesticide plant on the night of 2–3 December 1984. The page does not discuss how to handle or release the chemical. The public fact is an uncontrolled urban exposure.
The official immediate death toll often cited is 2,259. Indian government statements later used about 3,500 deaths in the first days and more than 15,000 gas-related deaths over the following years. Campaign estimates run higher. All of these are dated published figures, not a single census.
UCC paid US$470 million to the Union of India under Supreme Court orders of 14–15 February 1989 to resolve civil claims. Criminal proceedings were first quashed and later revived. Distribution of the money to claimants took years and remains criticised.
On 7 June 2010 a Bhopal court convicted seven former UCIL officials, including chairman Keshub Mahindra, and the Indian company of causing death by negligence (IPC 304A) and related counts. Sentences were two years and fines. An eighth accused had died. Warren Anderson was not in the dock.
Civil claims were settled; criminal law produced only negligence convictions of Indian employees; the American parent executive was never tried in India; the factory site’s contamination file is not closed. Those outcomes do not add to a single word like convicted or closed.
The 1985 claims-processing Act, the Environment (Protection) Act 1986 and the Public Liability Insurance Act 1991. Together they centralised claimant representation, environmental rule-making and no-fault industrial insurance.
The release is not in serious doubt. The strength of the file varies by question: chemistry, headcount, parent duty.
English discovery from the 1980s United States suits still feeds technical reconstructions.
Document
UCIL operating records and later expert reports establish an MIC release from a named tank. Safeguard status is part of that paper.
Document
The 2,259 immediate official deaths and later five-figure attributions come from government statistical files, not from a single night register.
Inquiry
Indian Council of Medical Research work and independent clinics document long-term illness in exposed populations.
Statute
The February 1989 settlement texts are the civil-law centre of the case and the reason mixed status is not the same as unsolved.
Testimony
The charge reduction and the June 2010 convictions fix what Indian criminal law was willing to hold Indian employees to.
Physical
Soil and groundwater sampling after 1984 supports an unfinished cleanup file distinct from the gas-leak night.
MIC from the UCIL plant on 2–3 December 1984 is a stable fact.
Immediate official, later government and campaign totals diverge by an order of magnitude if misread as one census.
Civil closure in 1989 and failed extradition leave a thin criminal hold on UCC itself.
Contamination is documented; remedy responsibility is still argued.
Evidence closed the what. It did not produce a single satisfactory who-pays-the-rest.
Public-record encyclopedia. Not legal advice. Not a how-to. Graphic detail is withheld. Wars belong in a separate atlas.