The Central and State Pollution Control Boards and Pollution Control Regulation: Composition, Functions, Consent, Compensation, Monitoring and Enforcement

The Central Pollution Control Board and the State Pollution Control Boards are the working machinery of Indian pollution law. They are created by the Water Act, 1974, perform functions under the Air Act, 1981, exercise powers delegated under the Environment (Protection) Act, 1986, and implement dozens of rules on waste, noise and hazardous substances. This note brings together, in one place, the institutional law of the Boards and the practice of pollution control regulation: how the Boards are composed, what they do, how the consent system works from application to revocation, how industries are categorised, how compliance is monitored, when the Boards may demand environmental compensation, and when closure is preferred to prosecution.

1. The Central Pollution Control Board: Complete Note

1.1 Origin and legal status

The CPCB was constituted in September 1974 under Section 3 of the Water Act as the Central Board for the Prevention and Control of Water Pollution, and was renamed the Central Pollution Control Board by the Water Amendment Act, 1988. Under Section 3 of the Air Act the same body functions as the Central Board for air. It is a statutory body corporate with perpetual succession and a common seal, and functions as a field formation and technical wing of the Ministry of Environment, Forest and Climate Change. Its headquarters is in Delhi, with regional directorates across the country.

1.2 Composition of the CPCB

Under Section 3(2) of the Water Act, the Central Board consists of:

1. a full-time Chairman, having special knowledge or practical experience in matters relating to environmental protection, or knowledge and experience in administering institutions dealing with such matters, nominated by the Central Government;
2. not more than five officials of the Central Government, to represent that Government;
3. not more than five persons nominated from among the members of the State Boards, of whom not more than two shall be from among members of local authorities;
4. not more than three non-officials representing the interests of agriculture, fishery or industry or trade, or any other interest which the Central Government considers ought to be represented;
5. two persons representing companies or corporations owned, controlled or managed by the Central Government; and
6. a full-time Member-Secretary, possessing qualifications, knowledge and experience of scientific, engineering or management aspects of pollution control.

Members other than the Member-Secretary ordinarily hold office for three years (Section 5). The Board must meet at least once in every three months (Section 8). It may constitute committees (Section 9) and temporarily associate persons whose assistance it needs (Section 10). The Central Government may supersede the Central Board for persistent default (Section 61).

1.3 Functions of the CPCB

The functions of the CPCB are drawn from three statutes:

• Water Act, Section 16: promote cleanliness of streams and wells; advise the Central Government; co-ordinate the State Boards and resolve disputes among them; technical assistance, research and training; mass media programmes; collection and publication of data; manuals and codes for treatment of sewage and trade effluents; standards for streams and wells; a nation-wide programme; laboratories.
• Air Act, Section 16: improve the quality of air; advise the Central Government; plan a nation-wide programme; co-ordinate State Boards; lay down standards for the quality of air (the NAAQS); manuals and codes on stack gas cleaning devices; data and information.
• EPA and rules: powers delegated under Section 23 of the EPA, including the power to issue directions under Section 5; standard-setting; functions under the waste management rules, such as registration of producers, importers and brand owners for extended producer responsibility under the Plastic, E-Waste and Battery Waste Rules; monitoring of the National Clean Air Programme; and preparation of guidelines such as the categorisation of industries and the methodology for environmental compensation.

The CPCB also performs the functions of a State Board for the Union territories, and may delegate them to a body such as a Pollution Control Committee.

2. The State Pollution Control Boards: Complete Note

2.1 Origin and legal status

Each State has a State Pollution Control Board constituted under Section 4 of the Water Act. Under the Air Act, the State Water Board functions as the State Board for air (Section 4), and Section 5 provides for constitution of a State Board where none exists. Each is a body corporate. State Boards are the principal regulators on the ground: they grant consents, inspect, sample, issue directions and adjudicate day-to-day compliance.

2.2 Composition of the SPCB

Under Section 4(2) of the Water Act, a State Board consists of a full-time Chairman with special knowledge or practical experience in environmental protection or administrative experience, nominated by the State Government (in the manner prescribed by the Central Government, where the Water Amendment Act, 2024 applies); not more than five officials of the State Government; not more than five persons from the local authorities functioning in the State; not more than three non-officials representing agriculture, fishery, industry, trade or other interests; two persons representing companies or corporations owned by the State Government; and a full-time Member-Secretary with qualifications in pollution control. The State Government may supersede a State Board for persistent default (Section 62).

2.3 Functions of the SPCB

Under Section 17 of the Water Act and Section 17 of the Air Act, the State Board: plans a comprehensive programme for the prevention, control or abatement of pollution in the State; advises the State Government, including on the location of industries; collects and disseminates information; carries out and sponsors investigations and research; organises training and mass awareness; inspects treatment plants, control equipment, industrial plants and manufacturing processes; lays down effluent and emission standards, including standards stricter than national ones where local conditions require; evolves economical and reliable treatment methods; grants, refuses, reviews and revokes consents; issues directions under Section 33A of the Water Act and Section 31A of the Air Act; and establishes or recognises laboratories. It also implements the waste management rules, the Noise Rules and other rules made under the EPA.

3. CPCB and SPCB Compared

Under Section 18 of both Acts, the Central Board is bound by directions of the Central Government, and a State Board by directions of the Central Board or the State Government. If a direction of the State Government conflicts with one from the Central Board, the Central Government decides. In an emergency arising from a State Board's default, the Central Government may direct the Central Board to perform the State Board's functions. The Central Board in turn uses directions under Section 18(1)(b) to require State Boards to act, for example to enforce online monitoring.

3.1 Pollution Control Committees in the Union territories

The Union territories do not have State Boards. The CPCB exercises the powers of a State Board for them and, under the Water and Air Acts, may delegate those powers to a person or body. It has done so by constituting Pollution Control Committees, of which the Delhi Pollution Control Committee (DPCC) is the most important. The Pollution Control Committees exercise the functions of a State Board, including consent and directions, within their territory. The Supreme Court's decision in Delhi Pollution Control Committee v. Lodhi Property Co. Ltd. (2025) arose from the DPCC's action against buildings operating without consent.

4. Regulatory Powers of the Boards

4.1 Directions by Pollution Control Boards

The Boards' most powerful tool is the power to issue directions in writing to any person, officer or authority, which includes the power to direct closure, prohibition or regulation of any industry, operation or process and the stoppage or regulation of electricity, water or any other service (Section 33A, Water Act; Section 31A, Air Act). The CPCB may also exercise the Central Government's power under Section 5 of the EPA where it has been delegated. Directions must follow a fair procedure, ordinarily a show cause notice and hearing, must be reasoned and proportionate, and are appealable to the NGT (Section 33B, Water Act; Section 31B, Air Act; Section 5A, EPA).

4.2 Inspection powers

Officers empowered by a Board may enter any place at reasonable times to perform the Board's functions, to check compliance with the Act, rules, orders, directions and consents, to examine and test plant, equipment, records and documents, and to search and seize evidence where an offence is suspected (Section 23, Water Act; Section 24, Air Act; Section 10, EPA). The frequency of routine inspection depends on the category of the industry, with Red category industries inspected most often. Obstruction attracts monetary penalties after the 2023 and 2024 amendments.

4.3 Sampling powers

The Boards may take samples of water, effluent, air or emissions (Section 21, Water Act; Section 26, Air Act; Section 11, EPA). Because the results are used as evidence, the statutes prescribe a strict procedure: notice to the occupier, collection in his presence, sealing and signing of containers, and dispatch to a recognised laboratory. A sample taken without following the procedure may be inadmissible, which is why Boards rely increasingly on continuous online monitoring data as well.

4.4 Environmental laboratories

Samples are analysed in laboratories established or recognised under the statutes: the Central and State Water Laboratories (Sections 51 and 52, Water Act), State Air Laboratories (Section 28, Air Act) and environmental laboratories recognised under Section 12 of the EPA. Reports signed by Government analysts are evidence of the facts stated in them (Section 54, Water Act; Section 30, Air Act; Section 14, EPA). Many private laboratories are recognised under the EPA, subject to accreditation requirements.

5. The Consent Mechanism

Consent is the heart of pollution control regulation. It converts general standards into a specific licence for a specific unit, with conditions tailored to its process, location and capacity.

5.1 Consent to Establish

Consent to Establish (CTE), under Section 25(1)(a) of the Water Act and Section 21 of the Air Act, is required before any step is taken to establish an industry, operation or process likely to discharge effluent or emit pollutants. At this stage the Board examines the siting (compliance with zoning, distance from water bodies and habitation, eco-sensitive areas), the process and raw materials, the proposed effluent treatment and air pollution control systems, water consumption and waste management. CTE is granted for a period within which the unit must be built. Since November 2024 a unit that has obtained environmental clearance under the EIA Notification does not need a separate CTE, and White category units need no consent at all.

5.2 Consent to Operate

Consent to Operate (CTO), under Section 25(1)(b) and (c) of the Water Act and Section 21 of the Air Act, is required before the unit starts production or begins discharge or emission. The Board verifies that the treatment and control systems promised at the CTE stage have been installed and are working, and fixes the operating conditions: quantity and quality of discharges and emissions, stack height, monitoring and reporting requirements, waste disposal and green belt. CTO is granted for a fixed period.

5.3 Renewal of environmental consent

Consent to operate must be renewed before it expires. Renewal is not automatic: the Board reviews the unit's compliance record, monitoring data, inspection reports and environmental statements. Several States allow auto-renewal on self-certification for units with a clean record. The validity of CTO has traditionally varied by category, with Red category units renewed most frequently and Green category units least, and the uniform consent guidelines as amended in January 2026 allow States to fix a single CTO fee for periods of five to twenty-five years.

5.4 Refusal of consent

The Board may refuse consent for reasons to be recorded in writing (Section 25(4), Water Act; Section 21, Air Act). Common grounds are unsuitable location, inadequate treatment or control arrangements, failure to obtain other required clearances, and past non-compliance. Because refusal affects the right to carry on business under Article 19(1)(g), it must be reasoned and made after considering the applicant's case; it is appealable to the appellate authority and then to the NGT.

5.5 Revocation of consent

The Board may review consent conditions and vary or revoke consent (Section 27, Water Act; Section 21(6), Air Act), after giving the holder a reasonable opportunity of being heard. Revocation is typically followed by a direction under Section 33A or 31A for closure and disconnection of electricity and water. The Sterlite copper smelter at Thoothukudi is an example: the Tamil Nadu Board refused renewal of consent in 2018, the State directed permanent closure, and the Supreme Court declined to interfere in Vedanta Ltd. v. State of Tamil Nadu (2024).

5.6 Industry classification: Red, Orange, Green, White and Blue

In 2016 the CPCB introduced a scientific categorisation of industrial sectors based on a pollution index score reflecting emissions, effluents, hazardous waste generation and resource consumption. The category determines the level of scrutiny, the consent validity period and the frequency of inspection:

• Red: highly polluting sectors, such as thermal power, cement, iron and steel, petrochemicals, pesticides, tanneries, distilleries and pulp and paper. Red category industries are ordinarily not permitted in ecologically fragile or protected areas.
• Orange: moderately polluting sectors.
• Green: sectors with low pollution potential.
• White: practically non-polluting sectors, which since November 2024 need no consent under the Water and Air Acts.
• Blue: a category introduced in the 2025 revision for essential environmental services, such as waste-to-energy plants, landfills, biomining facilities, common treatment facilities and certain compressed biogas plants. Although some of these activities score high on the pollution index, they are classified separately because they reduce overall pollution, and receive an extended consent validity as an incentive.

6. Environmental Compensation by Pollution Control Boards

Environmental compensation is a monetary liability imposed on a polluter to repair or offset environmental damage. It is distinct from a penalty, which punishes a contravention. Following directions of the NGT, the CPCB published a methodology for assessing environmental compensation (2019), using factors such as the pollution potential of the industry, the duration of the violation, the scale of operation and its location. Boards have levied compensation for operating without consent, exceeding standards, failing to treat sewage, and mismanaging waste.

The authority of the Boards to do so was contested, and has been settled by the Supreme Court.

7. Treatment Infrastructure: CETPs and STPs

7.1 Common Effluent Treatment Plants

Common Effluent Treatment Plants treat the combined effluent of clusters of small and medium industries, such as tanneries, textile dyeing, electroplating and chemical units, that cannot economically run individual plants. A CETP is itself a 'treatment and disposal system' that needs consent from the Board, and its discharge is trade effluent that must meet standards. Member units usually pre-treat their effluent to specified inlet standards before sending it to the CETP. CETPs are typically run by a special purpose vehicle of the member industries, with capital support from central and State schemes. Their performance has been uneven, and the Supreme Court in Paryavaran Suraksha Samiti v. Union of India, (2017) 5 SCC 326, directed that existing CETPs be made fully operational within fixed time-limits, failing which member units would face closure.

7.2 Sewage Treatment Plants

Sewage Treatment Plants treat municipal sewage before discharge into rivers or reuse. Municipal bodies that discharge sewage need consent and are subject to standards, and STPs must meet discharge standards for parameters such as BOD, suspended solids and faecal coliform. Much of India's urban sewage remains untreated because of insufficient capacity and poorly functioning plants. Paryavaran Suraksha Samiti required local bodies to set up STPs within fixed time-frames, and the NGT has imposed environmental compensation on States for failure to treat sewage.

8. Continuous Monitoring and Compliance

8.1 Continuous Emission Monitoring Systems and Online Continuous Effluent Monitoring Systems

In 2014 the CPCB, exercising its power under Section 18(1)(b) of the Water and Air Acts, directed the State Boards to require seventeen categories of highly polluting industries (such as thermal power, cement, distilleries, pulp and paper, sugar, tanneries, chemicals, pesticides, iron and steel and refineries), together with CETPs, STPs and certain waste facilities, to install Online Continuous Emission Monitoring Systems (CEMS) on stacks and Online Continuous Effluent Monitoring Systems (OCEMS) on effluent outlets. The systems measure parameters such as particulate matter, sulphur dioxide and oxides of nitrogen in emissions, and pH, BOD, COD and suspended solids in effluents, and transmit data in real time to the servers of the CPCB and the State Board.

Continuous monitoring changes the character of enforcement. Violations are detected as they occur rather than at occasional inspections, generating automatic alerts; data can support directions and compensation; and the Water Amendment Act, 2024 makes knowing or wilful tampering with monitoring devices subject to a penalty of up to fifteen lakh rupees. The main limitation is the legal status of the data as evidence, which is why physical sampling under the statutory procedure remains important for penal proceedings.

8.2 Environmental compliance monitoring

Compliance monitoring combines several instruments:

• Consent conditions and periodic reporting;
• Inspections, with frequency linked to the category of the industry;
• Sampling under the statutory procedure;
• CEMS and OCEMS data;
• Environmental statements under Rule 14 of the Environment (Protection) Rules, filed by 30 September each year;
• Compliance reports on environmental clearance conditions, submitted every six months to the Ministry;
• Third-party audit by Registered Environment Auditors under the Environment Audit Rules, 2025, which supplement Board inspections;
• Public scrutiny, through disclosure of consent orders and monitoring data on Board portals.

9. Closure Directions versus Prosecution

The Boards can respond to a violation in two broad ways: by an administrative direction, including closure, or by penal proceedings, which after 2024 largely means a penalty before the adjudicating officer and, for operating without consent or failing to pay a penalty, prosecution in a criminal court.

In practice, closure and regulatory directions have been far more effective than prosecution. Prosecutions under the original Acts were rare, slow and seldom ended in conviction, which was one of the reasons given for decriminalisation. But closure is a blunt instrument: it affects workers and investment, and courts expect it to be proportionate, preceded by a fair hearing, and used where lesser measures, such as time-bound compliance directions, bank guarantees or environmental compensation, would not suffice. The best regulatory practice uses an escalating ladder: advice and warning, directions with deadlines, bank guarantees, compensation and penalty, and finally closure.

10. Critical Appraisal of the Boards

The Boards have been criticised for chronic shortages of scientific and technical staff, inadequate laboratories, political and industrial influence on appointments, a heavy consent workload that leaves little time for monitoring, and dependence on consent fees for revenue. Reforms of the last decade, including online consent systems, categorisation, continuous monitoring, the Environment Audit Rules, decriminalisation with adjudicated penalties, and the Supreme Court's recognition of the Boards' compensatory powers, aim to make them faster and more effective. Their success will depend on independence, expertise and resources, the concerns the Supreme Court highlighted in Techi Tagi Tara (2018).

11. Related Topics and Provisions