PFAS Contamination in India: The Regulatory Gap in Drinking Water

PFAS Contamination in India Latest News

• Polyfluoroalkyl substances (PFAS) — commonly called “forever chemicals” — have been found in water sources across multiple Indian states, yet India’s water treatment systems and regulatory framework remain ill-equipped to detect or remove them. 
• With no PFAS-specific drinking-water limit currently in place, this emerging contamination issue carries significant public health and policy implications.

What Are PFAS?

• PFAS are synthetic chemical compounds containing multiple carbon-fluorine bonds.
• Used widely in coatings, textiles, and industrial products.
• Notorious for resisting degradation — they can contaminate the environment for decades, earning the “forever chemicals” label.
• PFAS have existed for 60 years, yet regulation has lagged behind their spread.

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Health Concerns: What We Know

• In 2025, the International Agency for Research on Cancer (IARC) classified: 
  • Perfluorooctanoic acid (PFOA) as “carcinogenic to humans.”
  • Perfluorooctanesulfonic acid (PFOS) as “possibly carcinogenic to humans.”
• Important caveat: Merely detecting PFAS in water doesn’t indicate health risk by itself — risk depends on the type of PFAS, dose, duration, and route of exposure.
  • A February 2026 study found that a mix of 24 PFAS compounds delayed zebrafish egg hatching, inhibited offspring growth, accumulated in blood, and reduced heart rates — raising concerns about broader ecological and health impacts.

Evidence of Contamination Across India

• A 2025 review in the Journal of Hazardous Materials Advances examined monitoring across Gujarat, Maharashtra, Tamil Nadu, and West Bengal. 
• Key finding: PFAS contamination is a “legitimate concern,” but its national extent remains poorly defined — partly due to inconsistent testing and analysis methods across research groups.

IIT-Madras Study (2024)

• Analysed 14 water samples (2022–23) from groundwater, surface water, and four stages of a water treatment plant.
• Groundwater near garbage dumps showed the highest PFAS levels.
• Startling finding: PFAS concentrations were 5% to 103% HIGHER in treated water than raw water — suggesting treatment processes may convert unidentified precursors into more stable PFAS.
• Researchers noted the 8 target PFAS tested represent only a fraction of potentially diverse fluorinated compounds present — broader testing beyond fixed lists is needed.

Why Treatment Systems Are Failing

• Conventional biological wastewater treatment cannot remove PFAS.
• Adsorption-based treatment shows potential but low-cost materials for PFAS capture are still under development.
• Testing against a fixed list of PFAS risks missing undetected substances, since precursors can transform into other PFAS over time.
• High-resolution mass spectrometry can help identify PFAS beyond fixed lists, but requires care since PFAS can contaminate samples during collection/analysis itself.

India’s Regulatory Response: Work in Progress

• The Union Environment Ministry has confirmed there is no specific regulation banning PFAS manufacturing.
• India has no PFAS-specific drinking-water limit under the current IS 10500:2012 standard — though this standard is under revision.
• The Bureau of Indian Standards (BIS) has formed a dedicated Working Group on Emerging Contaminants and Forever Chemicals to examine PFAS limits.
• Scope and specific PFAS to be regulated have not yet been finalised; analytical testing methods are also under consideration.
• CSIR-Indian Institute of Toxicology Research (IITR), Lucknow is participating in a UNEP-funded National Implementation Plan to build baseline PFAS data, and has developed capability to detect 50 multi-class PFAS molecules.

Conclusion

• India’s PFAS problem is a textbook case of regulation lagging behind contamination. 
• Multiple independent studies have already flagged forever chemicals in groundwater, treated water, and coastal sewage, yet no enforceable drinking-water limit exists, and conventional treatment plants may even be inadvertently creating more stable PFAS compounds. 
• With global health agencies now classifying key PFAS as carcinogenic, experts agree that waiting for complete exposure data before acting is no longer a defensible position — India needs precautionary interim limits, harmonised testing standards, and a clear accountability framework, well before full contamination mapping is complete.

Source: TH | TH | IWP