Water (Prevention and Control of Pollution) Act, 1974 — Environmental Law Notes

Water (Prevention and Control of Pollution) Act, 1974

By the early 1970s the Ganga, the Yamuna and dozens of smaller rivers were carrying the raw effluent of India’s new factories straight past the towns that drank from them. But water is a State subject, so no single State could fix a river that flowed through several. The way out was constitutional teamwork: twelve States passed resolutions under Article 252 asking Parliament to legislate for them, and the result was India’s very first pollution statute — the Water (Prevention and Control of Pollution) Act, 1974. Every pollution law that followed, including the Air Act, is built on its template.

What the Water Act is — and the design behind it

Before the details, hold on to the shape of the whole pollution half of this unit, because the Water Act invented it and the Air Act simply copied it. Every Indian pollution-control statute has four moving parts:

A definition — what counts as “pollution”.
Regulators — the Central and State Pollution Control Boards (Topic 3).
A consent mechanism — no industry may discharge without the Board’s prior permission.
Offences and penalties — for breaking those rules (Topic 4).

The Water Act, 1974 puts this to work for water. Its stated purpose is not only to prevent and control water pollution but also to maintain and restore the wholesomeness of water — so the Act is about keeping water usable, not merely punishing polluters after the damage. Because water is a State subject, Parliament could enact it only after States invited it in under Article 252 of the Constitution; the same Boards it creates were later handed the job of running the Air Act too.

Section 2(e), Water (Prevention and Control of Pollution) Act, 1974: “‘pollution’ means such contamination of water or such alteration of the physical, chemical or biological properties of water or such discharge of any sewage or trade effluent or of any other liquid, gaseous or solid substance into water (whether directly or indirectly) as may, or is likely to, create a nuisance or render such water harmful or injurious to public health or safety, or to domestic, commercial, industrial, agricultural or other legitimate uses, or to the life and health of animals or plants or of aquatic organisms.”

In Simple Terms: Water is “polluted” the moment someone contaminates it, or changes its physical, chemical or biological properties, badly enough to create a nuisance or to make it harmful — to people, to normal uses like farming and industry, or to fish and plants. Notice how wide this is: even changing water’s properties (for example filling up a pond) counts, which is exactly what the Calcutta High Court held in Mohan Vaniya Viniyog Private Ltd vs State of West Bengal (2007).

A. The identified sources — what the Act targets

The essay asks for the “identified sources of water pollution”. The Act names them through the polluting matter it regulates, so give these as your list:

Sewage effluent — the outflow from any sewage system or sewage-disposal works, including sullage from open drains (domestic waste water). Defined in s. 2(g).
Trade effluent — any liquid, gaseous or solid substance discharged from premises used for any industry, operation, process, or treatment and disposal system, other than domestic sewage. Defined in s. 2(k). This is the factory-waste category.
Any other poisonous, noxious or polluting matter — the catch-all: any substance that enters a “stream” and harms water quality.

The Act then defines a “stream” very widely in s. 2(j) — it includes a river, a flowing or dry watercourse, natural or artificial inland water, subterranean (underground) waters, and the sea or tidal waters up to a limit the State notifies. That word “subterranean” is important: it is the hook the Boards use to reach groundwater pollution, even though the Act nowhere says “groundwater”.

B. The core prohibition — section 24

The heart of the Act is one flat ban. Under s. 24, no person shall knowingly cause or permit any poisonous, noxious or polluting matter to enter (directly or indirectly) into a stream, well, sewer or on land, and no person shall knowingly do anything that impedes the proper flow of water so as to aggravate pollution. Note two things you should mention in an answer: the offence needs knowledge (mens rea) — it is not a pure no-fault offence — and the words “or on land” were added by the 1988 amendment precisely to catch dumping that later seeps into groundwater.

The ban is not absolute; industry may discharge treated effluent, but only with permission. Under s. 25, no person may establish or take steps to establish any industry, operation or process, or any treatment and disposal system, likely to discharge sewage or trade effluent into a stream, well, sewer or on land without the prior consent of the State Pollution Control Board. The Board may grant consent with conditions, refuse it, or (once given) withdraw it if conditions are breached. This “consent-granting mechanism” is the single most important control device in the whole Act — it lets the Board vet a factory before it starts polluting.

D. The Central Government’s power to control water pollution

Because the Act works mainly through the Boards, the Centre’s control is largely through them. The Central Pollution Control Board (CPCB) advises the Central Government, lays down water-quality standards and coordinates the State Boards. Crucially, under s. 18, where the Central Government is of the opinion that a State Board has defaulted on a direction and a grave emergency has arisen, it may direct the CPCB to step into the shoes of the State Board and perform its functions. After the Environment (Protection) Act, 1986, a new s. 33A let a Board issue binding written directions to any person — including ordering the closure of an industry or the stoppage of its electricity and water. (The Boards themselves are Topic 3; the penalties are Topic 4.)

🧩 WORKED EXAMPLE — is a discharge lawful under the Water Act?

Facts. A new textile dyeing unit lays a pipe to release its coloured, chemical-laden waste into a nearby canal. It has taken no permission from the State Board. A downstream village complains that the canal water is now unusable.

Rule. Under s. 24 no one may knowingly let polluting matter enter a stream; under s. 25 no industry likely to discharge trade effluent may even be established without the State Board’s prior consent. A “stream” (s. 2(j)) includes an artificial inland watercourse such as a canal.

Apply. The dye waste is “trade effluent” (s. 2(k)); the canal is a “stream”; the unit both discharges polluting matter (s. 24) and was set up to discharge without prior consent (s. 25). The knowledge element is satisfied — the unit deliberately laid the pipe.

Conclusion. The unit is in breach of both s. 24 and s. 25. The Board can refuse or withhold consent, order the discharge stopped, and under s. 33A direct closure; prosecution follows under the penalty sections (Topic 4).

flowchart TD
    ROOT["Water Act 1974<br/>(enacted under Art. 252)"]:::root
    ROOT --> DEF["Definition<br/>'pollution' s. 2(e); 'stream' s. 2(j)"]:::leaf
    ROOT --> SRC["Identified sources<br/>sewage effluent · trade effluent<br/>· other polluting matter"]:::leaf
    ROOT --> BAN["Core ban — s. 24<br/>no polluting matter into<br/>stream/well/sewer/land"]:::leaf
    ROOT --> CON["Consent — s. 25<br/>State Board's prior consent<br/>to establish/operate"]:::leaf
    ROOT --> POW["Central power<br/>s. 18 (CPCB steps in);<br/>s. 33A closure directions"]:::leaf
    classDef root fill:#FFF8DC,stroke:#000,stroke-width:1px,color:#000;
    classDef leaf fill:#E6F3FF,stroke:#1E3A8A,color:#000;
    linkStyle default stroke:#888,stroke-width:1px;

Case Laws

Mohan Vaniya Viniyog Private Ltd vs State of West Bengal (2007) — filling up water bodies and streams alters the physical properties of water; “pollution” under the Water Act must be read widely, not narrowly.
M.C. Mehta vs Union of India (1988) (the Ganga Pollution / Kanpur Tanneries case) — the Supreme Court ordered tanneries discharging untreated effluent into the Ganga to set up treatment plants or shut down; financial inability to install a treatment plant is no excuse for polluting.
Vellore Citizens Welfare Forum vs Union of India (1996) — applied the precautionary principle and polluter-pays to industrial water pollution, reinforcing the Water Act’s consent-and-standards scheme.

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Water (Prevention and Control of Pollution) Act, 1974 — Environmental Law Notes