New Delhi, Nov. 29 -- The capital city had the third highest share of uranium-contaminated groundwater samples in the country in 2024, with readings above the Bureau of Indian Standards (BIS) limit of 30 parts per billion (ppb) in both pre- and post-monsoon testing, the Central Ground Water Board's Annual Ground Water Quality Report 2025 shows.

The national comparison is based on 3,754 groundwater samples collected across states and Union territories. In Delhi, 15.66% of samples collected after the monsoon exceeded the safe uranium threshold. In the pre-monsoon period, 13.25% of samples recorded high contamination. The capital ranked third after Punjab and Haryana, the report said.

Health experts underline that long-term use of uranium-...