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general knowledge Online Quiz - 4759
In a survey recently conducted by the CGWA (Central Ground Water Authority) and CPCB (Central Pollution Control Board), the groundwater samples in one-fourth of the neighborhood tested in New Delhi were unfit for drinking. They contained high levels of two minerals that are not eliminated by ordinary water filters and are extremely harmful at high concentrations. Name them.
Groundwater contamination in Delhi has been found with high levels of nitrate and fluoride, which are not removed by ordinary water filters. Nitrates come from sewage and agricultural runoff, while fluoride occurs naturally but reaches harmful concentrations from over-extraction. Mercury, zinc, and arsenic are toxic contaminants but not the primary concern identified in this specific Delhi groundwater survey.