GS I›ENV-4.1.2›Water pollution — rivers, groundwater, standards

Water pollution — rivers, groundwater, standards

ENV-4.1.2Probable
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0/5 stages complete · 0% coverage

Exam Strategy

UPSC tests water pollution through river health case studies (Ganga, Yamuna), statutory standards (BOD, COD, DO limits), and groundwater contamination mechanisms. Examiners focus on pollutant types, measurement parameters, and Indian water quality standards rather than deep scientific analysis. Avoid confusing BOD/COD; memorize specific threshold values for Class I-V water bodies.

High-yield hooks
1

BOD >3 mg/L indicates severe river pollution

2

Groundwater: nitrate >45 mg/L is unsafe

3

Class I = drinking without treatment; Class V = effluent discharge

4

DO (dissolved oxygen) <4 mg/L = aquatic stress

5

Thermal & agricultural runoff = major non-point sources

Coverage — 0/9 done
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SCANENVIRONMENT/WATER-QUALITYCURRENT-AFFAIRS/GANGA-CLEANUPPOLITY/ENVIRONMENTAL-STANDARDS