Sections 1 explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
Section 1 of the Air Act says the Act extends to the whole of India and comes into force on a date the Central Government appoints by notification. Section 2 gives the meaning of the terms the Act uses, from "air pollutant" and "chimney" to "industrial plant" and "occupier". Almost every duty in the Act turns on one of these definitions.
This article is current as amended up to the Jan Vishwas (Amendment of Provisions) Act, 2023 (in force for this Act from 1 April 2024). Sections 1 and 2 were not changed by that Act. Later amendments and notifications should be checked. If you are unsure which of these terms catches your plant, our compliance advisory team can help.
The Air Act, 1981 extends to the whole of India. "Air pollutant" means any solid, liquid or gaseous substance, including noise, present in the atmosphere in a concentration that may be or tends to be injurious to human beings, living creatures, plants, property or the environment. An "industrial plant" is any plant used for industrial or trade purposes and emitting any air pollutant into the atmosphere. The "occupier" is the person in control of the factory or premises, and for a substance, the person in possession of it.
Section 1: short title, extent and commencement
Section 1(1) gives the short title: the Air (Prevention and Control of Pollution) Act, 1981.
Section 1(2) says "It extends to the whole of India." Unlike the Water Act, there is no list of States and no adoption by resolution; the Act applies everywhere.
Section 1(3) says it "shall come into force on such date as the Central Government may, by notification in the Official Gazette, appoint". A footnote in the compiled text records that the date was 16 May 1981 under notification G.S.R. 351(E) dated 15 May 1981.
Section 2: the definitions
Clause letters are as printed. The table puts each clause in plain terms.
| Clause | Term | Meaning in the Act |
|---|---|---|
| (a) | Air pollutant | Any solid, liquid or gaseous substance (including noise) present in the atmosphere in such concentration as may be or tend to be injurious to human beings or other living creatures or plants or property or environment |
| (b) | Air pollution | The presence in the atmosphere of any air pollutant |
| (c) | Approved appliance | Any equipment or gadget used for bringing any combustible material or for generating or consuming any fume, gas or particulate matter, and approved by the State Board |
| (d) | Approved fuel | Any fuel approved by the State Board |
| (e) | Automobile | Any vehicle powered by an internal combustion engine or by any method of generating power to drive it by burning fuel |
| (f) | Board | The Central Board or a State Board |
| (g) | Central Board | The Central Pollution Control Board constituted under section 3 of the Water Act, 1974 |
| (h) | Chimney | Includes any structure with an opening or outlet from or through which any air pollutant may be emitted |
| (i) | Control equipment | Any apparatus, device, equipment or system to control the quality and manner of emission of any air pollutant, including any device used for securing the efficient operation of any industrial plant |
| (j) | Emission | Any solid or liquid or gaseous substance coming out of any chimney, duct or flue or any other outlet |
| (k) | Industrial plant | Any plant used for any industrial or trade purposes and emitting any air pollutant into the atmosphere |
| (l) | Member | A member of the Central Board or a State Board, including the Chairman |
| (m) | Occupier | In relation to any factory or premises, the person who has control over its affairs and, in relation to any substance, the person in possession of the substance |
| (n) | Prescribed | Prescribed by rules made under the Act by the Central Government or, as the case may be, the State Government |
| (o) | State Board | In a State where the Water Act is in force and a State Pollution Control Board has been constituted under its section 4, that Board; otherwise the State Board for the Prevention and Control of Air Pollution constituted under section 5 of this Act |
Reading the key definitions
"Air pollutant" is defined by concentration and effect. The test is whether the substance is present "in such concentration as may be or tend to be injurious". A substance is not an air pollutant merely because it is emitted; the concentration and likely harm matter. The words "(including noise)" were inserted by Act 47 of 1987 with effect from 1 April 1988, so noise is within the definition.
"Industrial plant" has two limbs. The plant must be used for industrial or trade purposes, and it must emit an air pollutant. A plant that emits nothing is not an industrial plant for this Act, which matters for the consent requirement in section 21.
"Chimney" and "emission" are wide. A chimney includes any structure with an opening or outlet from which a pollutant may be emitted, and emission covers anything coming out of a chimney, duct, flue "or any other outlet". A vent or a stack that is not called a chimney in your factory may still be one in law.
"Approved fuel" and "approved appliance" are fixed by the State Board. They matter in air pollution control areas, where the State Government can prohibit other fuels and appliances (see sections 19 and 20).
"Occupier" has the same two limbs as in the Water Act and the Environment (Protection) Act. For the Water Act version see sections 1 and 2 of the Water Act.
"State Board" is a bridge. In most States the Board constituted under the Water Act is also the Air Act Board, as sections 3 to 6 explain.
A map of the Act and of the 2023 changes
| Chapter | Sections | Subject | Changed by the Jan Vishwas Act, 2023 |
|---|---|---|---|
| I | 1-2 | Preliminary | No |
| II | 3-15 | Central and State Boards | No |
| III | 16-18 | Powers and functions of Boards | No |
| IV | 19-31B | Prevention and control of air pollution: control areas, consent, standards, samples, appeals | Yes: section 21(1) substituted and section 21A inserted |
| V | 32-36 | Fund, accounts and audit | No |
| VI | 37-46 | Penalties and procedure | Yes: sections 37 to 41 replaced by sections 37, 38, 38A, 39, 39A, 39B, 39C and 39D (sections 40 and 41 no longer exist); section 43(1) clause inserted |
| VII | 47-54 | Miscellaneous, supersession, rules | Yes: section 53(1)(h) inserted; section 50 is omitted |
For the Environment (Protection) Act's own parallel provisions on the same kind of definitions see sections 1 and 2 of that Act.
An example
Kaveri Foundry Private Limited runs a cupola furnace with a stack, a dust-collection unit and a diesel generator. The stack is a "chimney", the dust-collection unit is "control equipment", and the foundry is an "industrial plant" because it is used for trade purposes and emits pollutants. The person who controls the affairs of the foundry premises is its "occupier", and the duties of the Act fall on that person.
Need help with Air Act compliance?
Working out whether a stack, a vent or a generator brings your plant within the Act is the first step in any consent or notice reply. Our compliance advisory team can map your emission points against these definitions and the consent position in your State.
Key takeaways
- The Air Act extends to the whole of India and came into force on a date appointed by notification.
- "Air pollutant" is defined by concentration and likely injury and includes noise.
- An "industrial plant" must be used for industrial or trade purposes and must emit an air pollutant.
- "Chimney" and "emission" cover any outlet, duct or flue, not only a chimney by name.
- "Approved fuel" and "approved appliance" depend on approval by the State Board.
- The Jan Vishwas Act, 2023 changed sections 21, 37 to 41, 43 and 53; sections 1 and 2 are untouched.
Read next
- Sections 3 to 6: the Central and State Boards
- Section 21: consent to establish or operate an industrial plant
- Sections 1 and 2 of the Water Act: application and definitions
- Hazardous processes in factories: section 41A
Disclaimer: Based on the Environment (Protection) Act, 1986, the Air (Prevention and Control of Pollution) Act, 1981 and the Public Liability Insurance Act, 1991 as amended by the Jan Vishwas (Amendment of Provisions) Act, 2023 (in force for these Acts from 1 April 2024), the Water (Prevention and Control of Pollution) Act, 1974 as amended by its Amendment Act of 2024 (which applies only in the States and Union territories it names and in States that adopt it), and the National Green Tribunal Act, 2010 as amended by the Tribunals Reforms Act, 2021, as consulted on 3 October 2026. Later amendments, rules and notifications should be checked. This article is general information, not legal advice; check the official text before acting.