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30-Year Legacy Waste: ₹650 Cr Needed to Dispose 2.25 Lakh Tonnes Hexavalent Chromium Sludge in Ranipet

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains HighStatic GK Link
08 Apr 2026
~2 min
Source: The Hindu
Key Data:197519952.25 lakh tonnes₹650 crore
Bodies:Tamil Nadu Chromate and Chemicals Limited (TCCL)SIPCOT
Practice MCQs from today's news ▸
What This Article Covers

1.The defunct Tamil Nadu Chromate and Chemicals Limited (TCCL) factory, closed in 1995, has left behind 2.25 lakh tonnes of hazardous hexavalent chromium sludge in Ranipet, contaminating groundwater.

2.Safe disposal of the legacy waste is estimated to cost ₹650 crore, acting as a major financial impediment for government agencies and leaving the issue unresolved for decades.

3.Untreated effluents from numerous small-scale leather tanneries in the region are also discharged into the Palar River, compounding the pollution problem affecting agriculture and water sources.

The Big Picture
Prelims · HighMains · High

A 30-year-old environmental crisis in Tamil Nadu's Ranipet highlights the challenges of legacy industrial waste and poor governance. An estimated 2.25 lakh tonnes of toxic hexavalent chromium sludge from a closed factory, requiring ₹650 crore for safe disposal, continues to contaminate groundwater, affecting multiple villages. This case is a critical study for environmental laws, polluter accountability, and the long-term costs of industrial pollution.

Exam Lens

Quick Exam Facts From News

Factory Established1975
Factory Closed1995
Chromium Sludge Quantity2.25 lakh tonnes
Estimated Disposal Cost₹650 crore
Key PollutantHexavalent Chromium

1-Minute Revision

  • ›Factory Established: 1975
  • ›Factory Closed: 1995
  • ›Target this Data: 2.25 lakh tonnes of chromium sludge requiring ₹650 crore for disposal.
  • ›Target this Nodal Body: Tamil Nadu Pollution Control Board (TNPCB) for enforcement.
  • ›Target this Legal Point: The Water (Prevention and Control of Pollution) Act, 1974, under which such industrial discharge is regulated.

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

The regulation of industrial effluent discharge, as mentioned in the context of tanneries polluting the Palar River, is primarily governed by which Central Act in India?

Q2Statement-basedHard

Consider the following statements regarding the pollution issue in Ranipet as per the article:

1. The defunct Tamil Nadu Chromate and Chemicals Limited (TCCL) factory was established in 1975 and permanently closed in 1995.

2. The estimated cost for the safe disposal of the accumulated chromium sludge is around ₹850 crore.

3. The untreated effluents from leather tanneries in the area are discharged into the Cauvery River.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the article, what is the estimated quantity of hexavalent chromium sludge that remains undisposed at the defunct TCCL factory in Ranipet?

Q4Application/ImpactMedium

The primary reason cited in the article for the government's failure to clean up the chromium sludge in Ranipet for over 30 years is:

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