BharatNotes Effluent
noun; also adjectiveUsage in a UPSC answer
Unchecked discharge of untreated industrial effluent into the Ganga has rendered stretches of the river biologically dead, underscoring why the Namami Gange mission must pair sewage-treatment capacity with strict enforcement of the polluter-pays principle.
Synonyms
Antonyms
Word Family
effluence (n), efflux (n), effluents (n pl), affluent (adj/n), influent (adj/n)
Root
Latin ex- = out + fluere = to flow; effluere = to flow out; effluēns = present participle
Etymology
From Latin effluēns, present participle of effluere ("to flow out"), from ex- ("out") + fluere ("to flow"); first used in English in the 1720s.
Memory Hook
EF-FLU-ENT = "ex" (out) + "flu" (flow, as in fluid/fluent) — the stuff that FLOWs OUT of a factory pipe. Don't confuse with 'affluent' (rich): the affluent factory dumps effluent.
How This Word Works in UPSC Writing
Liquid waste discharged from an industrial process or treatment facility. The regulatory architecture is worth stating precisely: discharge is controlled through consent to establish and consent to operate, granted by State Pollution Control Boards under the Water (Prevention and Control of Pollution) Act, 1974, against standards prescribed under the Environment (Protection) Act, 1986. Two treatment arrangements recur in answers. An effluent treatment plant serves a single unit, while a common effluent treatment plant serves a cluster, which is what makes treatment financially viable for small units that could never fund their own, and was the arrangement the Supreme Court ordered for the Tamil Nadu tanneries in 1996. Zero liquid discharge goes further still, recovering and reusing water so that nothing leaves the plant as effluent.
Don’t Confuse It With
Effluent is liquid waste leaving a process or plant. Influent is what enters a treatment plant, the two being opposite ends of the same works. Sewage is domestic wastewater specifically, whereas effluent is more often industrial. Leachate percolates through solid waste rather than being discharged through a pipe. Emission is the gaseous equivalent, and discharge the general term for release into the environment.
Hindi Meaning
बहिःस्राव (bahihsrāv); औद्योगिक अपशिष्ट जल for industrial wastewater.
Common Questions
- What is effluent?
- Liquid waste discharged from a factory, industrial process or treatment plant into a water body or onto land.
- What is a common effluent treatment plant?
- A shared treatment facility serving a cluster of industrial units, which makes compliance affordable for small units that could not finance individual treatment plants.
Seen in UPSC Question Papers
- Prelims 2025 — Ecology
Real UPSC previous-year questions whose text uses “Effluent” — proof this word earns its place on your list.
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