Rules 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.
Rules 1 to 3 open the Environment (Protection) Rules, 1986. Rule 1 gives the short title and the date of effect, rule 2 defines the terms the rest of the rules use, and rule 3 is the working centre: it says that emission and discharge standards are those set in the Schedules, lets the Pollution Control Boards go stricter, and fixes the time an industry has to comply.
These rules are current as amended up to 31 March 2021 per the CPCB compilation; no later amendment to rules 1 to 14 has been notified to our knowledge on 3 October 2026, while the Schedules of standards are amended often. Check later amendments, CPCB guidelines and notifications before relying on any figure. For help in mapping these standards to your plant, see our compliance advisory service.
The standards for emission or discharge from industries, operations or processes are those specified in the Schedules (rule 3(1)). The Central Board or a State Board may specify more stringent standards for a specific industry, operation or process, but only after recording reasons in writing (rule 3(2)). A standard must be complied with within one year of being specified unless a shorter or different period is ordered (rule 3(3) and (4)).
Rule 1: title and commencement
The rules may be called the Environment (Protection) Rules, 1986 and came into force on the date of their publication in the Official Gazette. They were made under sections 6 and 25 of the Environment (Protection) Act, 1986. The parent power is explained in section 6 of the Act.
Rule 2: the definitions that matter in practice
Rule 2 defines a handful of terms. A few are worth knowing because they decide who is bound.
| Term | What rule 2 says |
|---|---|
| "areas" (clause (aa)) | All areas where hazardous substances are handled |
| "Central Board" | The Central Pollution Control Board constituted under section 3 of the Water Act, 1974 |
| "Form" | A form set forth in Appendix A to the rules |
| "Government Analyst" | A person appointed or recognised as such under section 13 |
| "person" | In relation to a factory or premises, a person or occupier or his agent who has control over its affairs; in relation to a substance, the person in possession of it |
| "prohibited substance" and "restricted substance" | The substance prohibited, or restricted, for handling |
| "recipient system" | The part of the environment, such as soil, water, air or other, that receives the pollutants |
| "State Board" | A State Pollution Control Board constituted under section 4 of the Water Act, 1974 or section 5 of the Air Act, 1981 |
The word "person" is wide. A plant manager with control of the premises, an occupier and a person holding a hazardous substance can all fall within it. "Recipient system" matters because rule 3(2) lets a Board tighten a standard depending on the quality of the system that receives the pollutant.
Rule 3(1): the Schedules carry the standards
Rule 3(1) says that, to protect and improve environmental quality and prevent and abate pollution, the standards for emission or discharge of environmental pollutants from industries, operations or processes "shall be as specified in Schedule I to IV". The Schedules, in plain terms, cover the following subjects. No figures are repeated here because they are revised often.
| Schedule | Subject |
|---|---|
| I | Industry-specific effluent and emission standards, industry by industry |
| II | Omitted (the rules record its omission in 1993) |
| III | Ambient air quality standards in respect of noise, by category of area |
| IV | Standards for emission of smoke, vapour and similar matter from motor vehicles |
| V | The authorities to be told of an accidental excess discharge (used by rule 12) |
| VI | General standards for discharge of environmental pollutants, effluents and emissions (used by rule 3A) |
| VII | National ambient air quality standards (used by rule 3(3B)) |
The industry-wise tables in Schedule I and the numerical limits elsewhere are not reproduced in this article. Read the current Schedule for your industry from the official text.
Rule 3(2): stricter standards
Despite rule 3(1), the Central Board or a State Board may specify standards that are more stringent than those in the Schedules for a specific industry, operation or process. Two conditions apply: the Board must act "depending upon the quality of the recipient system" and must record its reasons in writing. In practice this is why two plants of the same type in different places can face different limits. The reasons on file are also the starting point if the plant wants to contest the stricter limit.
Rule 3(3) and (4): time to comply
Under rule 3(3), standards specified under sub-rule (1) or (2) must be complied with within one year of being so specified. Rule 3(4) allows two variations:
- the Central Board or a State Board may, by order, specify a lesser period, depending on local conditions or the nature of the discharge; and
- the Central Government may, for any specific industry, operation or process, specify any period other than the one year.
Sub-rules (5), (6) and (7) are transitional. They gave industries that existed in 1991 and earlier fixed outer dates, from 31 December 1991 to 31 December 1993, and required proof of at least the commencement of physical work for pollution-control facilities for those with later dates. They are of historical interest for old plants.
Rule 3(3A): general standards in Schedule VI
For industries, operations or processes other than those for which standards are specified in Schedule I, emission or discharge may not exceed the relevant parameters and standards in Schedule VI from 1 January 1994. A State Board may specify more stringent standards for particular parameters, for a specific industry or location, after recording reasons in writing. While enforcing Schedule VI, the Board follows the guidelines in Annexure I and II of that Schedule.
Rule 3(3B): the combined effect in an area
The combined effect of emission or discharge in an area from industries, operations, processes, automobiles and domestic sources "shall not be permitted to exceed" the relevant concentration in ambient air shown in columns (4) and (5) of Schedule VII. This rule looks at the area, not at one plant, which is why a new plant in an already stressed area may be asked to do more.
Rule 3(8): ash content of coal
Rule 3(8) separately requires specified coal-based thermal power plants to use raw, blended or beneficiated coal with ash content not exceeding thirty-four per cent on a quarterly average basis, with dates depending on distance from the pit-head, and with an exemption for clean-technology plants such as those using fluidised bed combustion. The rule defines "captive thermal power plant", "critically polluted industrial area", "ecologically sensitive area", "pit-head power plant", "stand-alone thermal power plant" and "urban area" for this purpose.
Example
Konkan Dyes Private Limited makes textile chemicals and discharges treated effluent into a creek. Its industry has no entry in Schedule I, so the Schedule VI general standards apply. The State Board, noting the poor condition of the creek, records its reasons in writing and specifies a stricter value for one parameter. Konkan Dyes asks for the written reasons, plans a treatment upgrade and checks the order for any shorter compliance period under rule 3(4)(a). If the order is silent, the one-year period in rule 3(3) applies.
Need help with emission and discharge standards?
Reading the Schedule, the Board's own orders and the consent conditions together is where most compliance gaps appear. Our compliance advisory team can map your plant against the standards that apply to it and set up a monitoring and reporting calendar.
Key takeaways
- The standards for emission or discharge are in the Schedules; Schedule II is omitted and Schedules V to VII serve other rules.
- A Board can go stricter than a Schedule only after recording written reasons, having regard to the recipient system.
- The default period to comply is one year from the date the standard is specified; a Board or the Central Government can change it by order.
- Schedule VI covers industries with no Schedule I standard; Schedule VII caps the combined effect on ambient air in an area.
- The Schedules change often, so always read the current text.
Read next
- Rule 4: how directions under section 5 are given
- Rule 5: prohibiting or restricting the location of industries
- Section 6 of the EP Act: rules to regulate environmental pollution
- Sections 7 and 8 of the EP Act: emission standards and hazardous substance safeguards
Disclaimer: Based on the environment rules, guidelines and notifications named above as published in the Gazette of India, read with every amendment notified up to 3 October 2026 that the article names (consolidated reading texts from the CPCB 2021 compilation and the Goa State Pollution Control Board 2025 compilation were checked against the amending notifications), as consulted on 3 October 2026. Later amendments, CPCB guidelines, State Board orders and fees should be checked. This article is general information, not legal advice; check the official text before acting.