- 2067 Chaitra · 2 marks
Major pollutants of water
Short answer
Major water pollutants: pathogens, organic wastes, pesticides, nitrates, heavy metals (lead, mercury, cadmium, arsenic), acids, alkalis, salts, suspended solids, oil, thermal effluents, and radioactive substances.
Mention the major pollutants of water.
- Pathogens: bacteria, viruses, protozoa from sewage and animal waste.
- Organic wastes: sewage, food waste, detergents, oils and phenols.
- Agricultural chemicals: pesticides (DDT) and fertilisers (nitrates, phosphates).
- Heavy metals: Pb, Hg, Cd, As, Cr from industry and mining.
- Acids, alkalis and salts from industrial effluents.
- Suspended solids and silt, oil from spills, thermal (hot water), and radioactive wastes.
✓ Answer checked by Claude Opus 5.5 (high effort)
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