Which states have the worst groundwater contamination in India?

According to CGWB 2024 data: arsenic contamination is worst in the Gangetic belt (West Bengal, Bihar, UP, Jharkhand, Assam); fluoride in Rajasthan, MP, Gujarat, Andhra Pradesh, Telangana; heavy metal contamination concentrated around industrial clusters in Gujarat (Vapi, Ankleshwar), Punjab (Ludhiana), and Tamil Nadu (Tirupur, Vellore).

Can industrial groundwater contamination be reversed?

In most cases, once heavy metals or persistent organics have entered an aquifer, remediation is technically very difficult and economically prohibitive at scale. Pump-and-treat systems can manage contaminated plumes but rarely achieve full remediation. Prevention — through proper effluent treatment before any land discharge — is the only practical approach.

How do I know if my borewell water is safe for industrial use?

Commission a comprehensive water quality analysis from a NABL-accredited lab covering all parameters relevant to your intended use. For process water: at minimum test for TDS, hardness, pH, iron, manganese, nitrate, and heavy metals. In high-risk areas, also test for arsenic, fluoride, and uranium. Water quality should be re-tested annually, as contamination levels change over time.

What is PFAS contamination and why does it matter for industry?

PFAS (per- and polyfluoroalkyl substances) are man-made chemicals used in many industrial processes that do not break down in the environment. They have been detected in groundwater around chemical and petrochemical clusters including Vapi. PFAS exposure is linked to multiple health risks. They are extremely difficult to remove — activated carbon and RO are the current best available treatment options.

Do I need a CGWA NOC to use borewell water for my factory?

Yes, for abstraction above specified volumes in notified areas. In over-exploited and critical groundwater zones — which cover a growing number of industrial areas in India — new NOCs are not being granted. Check your specific groundwater zone designation with the CGWA website before planning any new groundwater abstraction.

Groundwater Contamination India Industries | Industrial Pollutants in Groundwater