PFAS Contamination in India
PFAS Contamination in India Raises Drinking Water Safety Concerns: Per- and polyfluoroalkyl substances (PFAS) have been detected in water samples across several Indian states, raising concerns about drinking-water safety and environmental pollution. These synthetic chemicals are widely used in industrial products and can persist in the environment for long periods.
According to the supplied report, India does not yet have a specific PFAS limit under its existing IS 10500:2012 drinking-water standard. The Bureau of Indian Standards (BIS) is examining the issue through a dedicated working group on emerging contaminants and so-called forever chemicals.
What Are PFAS?
PFAS are a large group of synthetic chemicals containing strong carbon-fluorine bonds, which make many of them resistant to environmental degradation. They have been used in textiles, surface coatings and various industrial applications.
Their persistence allows certain PFAS to remain in water, soil and living organisms for extended periods. This has earned them the name “forever chemicals.”
Static GK fact: PFAS is a broad chemical group, not a single substance. Different PFAS compounds can have different properties, exposure pathways and health effects.
Health and Environmental Concerns
The International Agency for Research on Cancer (IARC) classified perfluorooctanoic acid (PFOA) as carcinogenic to humans and perfluorooctanesulfonic acid (PFOS) as possibly carcinogenic to humans in its evaluations reported in 2025.
Research has also examined the potential effects of PFAS mixtures on aquatic organisms. A study cited in the supplied report found developmental and physiological effects in zebrafish exposed to a mixture of 24 PFAS compounds.
However, detecting PFAS in a water sample does not automatically establish a specific health risk. The risk depends on the chemicals present, their concentrations, exposure duration and route of exposure.
Evidence of Contamination in India
A 2025 review in the Journal of Hazardous Materials Advances examined monitoring studies involving Gujarat, Maharashtra, Tamil Nadu and West Bengal. It identified PFAS contamination as a concern while noting that the national extent remains uncertain because testing methods and available data vary.
An IIT Madras study examined 14 water samples collected during 2022–23 from groundwater, surface water and different stages of a treatment plant. Groundwater near garbage dumps showed the highest PFAS levels.
The study also reported that some treated-water samples had PFAS concentrations 5% to 103% higher than raw-water samples. Researchers suggested that chemical precursors might transform during treatment. The findings highlight the need for further investigation and broader testing beyond a limited list of target chemicals.
Why Conventional Treatment Is Challenging
Conventional biological wastewater treatment is generally ineffective at removing many PFAS compounds. Adsorption-based methods may help capture them, but affordable and effective treatment solutions remain an area of development.
Testing only for a fixed list of chemicals can also overlook unidentified PFAS and precursor compounds. Advanced analytical techniques, including high-resolution mass spectrometry, can help identify a wider range of substances, although careful sampling is essential to prevent contamination during analysis.
India’s Regulatory Response
According to the supplied report, India has not established a PFAS-specific drinking-water limit under the current IS 10500:2012 standard. The standard is under revision, and BIS has established a working group to examine emerging contaminants and possible PFAS limits.
The CSIR-Indian Institute of Toxicology Research (IITR), Lucknow, is also participating in a UNEP-funded National Implementation Plan to develop baseline data. The institute has reportedly developed the capability to detect 50 PFAS molecules across multiple classes.
Static GK Tip: CSIR stands for the Council of Scientific and Industrial Research, a network of research institutions under the Government of India.
Significance for Public Health
Addressing PFAS contamination requires consistent testing methods, reliable baseline data, suitable treatment technologies and clear drinking-water standards. Better monitoring can help authorities identify contamination hotspots and assess exposure more accurately.
Static Usthadian Current Affairs Table
PFAS Contamination in India Raises Drinking Water Safety Concerns:
| Fact | Detail |
| PFAS | Per- and polyfluoroalkyl substances |
| Common name | Forever chemicals |
| PFOA | Classified by IARC as carcinogenic to humans |
| PFOS | Classified by IARC as possibly carcinogenic to humans |
| Drinking-water standard | IS 10500:2012, according to the supplied report |
| Standards body | Bureau of Indian Standards (BIS) |
| IIT Madras study | Examined 14 water samples collected during 2022–23 |
| CSIR-IITR | Toxicology research institute located in Lucknow |
| Main regulatory concern | Absence of a specific PFAS drinking-water limit |
| Key response areas | Monitoring, testing, treatment and standards development |
