Permission to Run Your Unit, and Renewing It on Time

Building a unit with permission is only the first step. Before you start production, and for as long as you operate, you need Consent to Operate, or CTO, from the State Pollution Control Board or Pollution Control Committee. CTO confirms that your pollution control systems are in place and sets the conditions you must follow: discharge and emission limits, monitoring, reporting and waste handling. When it expires, it must be renewed.

Under consent guidelines issued by the central government in January 2025, CTO is valid for 5 years for red category units, 10 years for orange and 15 years for green, and boards must decide renewals within set times. Renewal applications filed late attract additional fees, and running a unit without a valid CTO exposes it to penalties, directions and closure. This page explains how CTO works, how to renew, what boards check and how to deal with problems.

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CTO at a glance

Getting your first CTO

Once construction is complete and pollution control equipment is installed, the unit applies for CTO with proof that the CTE conditions have been met. The board usually inspects the unit, checks the effluent treatment plant, air pollution control devices and stack heights, and may take samples. Trial runs are sometimes permitted for a limited period. CTO is granted with conditions specific to the unit, including limits on effluent volume and quality, emission standards, monitoring frequency, and requirements for hazardous waste and other authorisations.

Read the conditions carefully when CTO is granted. Many disputes arise because a unit did not notice a condition, such as quarterly monitoring reports, online monitoring for certain sectors, or a cap on water consumption. If a condition is unworkable, ask for modification promptly rather than ignoring it.

How to renew CTO

If your CTO has expired

Operating after CTO has expired is a serious breach. Since the Jan Vishwas Act, 2023 amendments to the Air Act and the Water (Prevention and Control of Pollution) Amendment Act, 2024 in places where it applies, many such breaches lead to penalties imposed by an adjudicating officer, rather than criminal prosecution. Boards can also direct closure or disconnection of power and water under Section 31A of the Air Act and Section 33A of the Water Act, and the Supreme Court held in August 2025 that they can require environmental compensation where damage is caused.

If your CTO has lapsed, apply immediately, pay the late fee, and be ready to show that your systems are working and monitoring results are within limits. If you have received a notice, reply in time with evidence. See closure notice reply and penalty defence.

Time and typical cost

Our fees are agreed in writing at the start, stage by stage. They are not linked to the outcome.

Documents usually needed

Laws that apply

How we work

We are a litigation and advisory practice led by Advocate BK Singh, with offices in Dwarka (New Delhi) and Vaishali (Ghaziabad). This is what you can expect:

• Renewals diarised: we remind clients well before the 120-day mark.
• Compliance checked first: so the renewal goes through without surprises.
• Conditions read closely: and unworkable ones challenged early.
• Delays escalated: using the 2025 guidelines.
• Written fee terms: agreed stage by stage, never linked to the outcome.

Mistakes we see with CTO

What the board checks at inspection

When a board officer inspects for a first CTO or a renewal, the visit usually follows a predictable pattern. The officer compares the actual production and machinery with what the consent allows, checks that the effluent treatment plant and air pollution control devices are running and properly maintained, looks at the logbooks for the ETP and stacks, and asks for recent monitoring reports from a recognised laboratory. For the seventeen categories of highly polluting industries and other units directed by the board, the officer will also check that the online continuous emission and effluent monitoring system is working and connected to the board's server.

Hazardous waste storage, manifests and the agreement with an authorised disposal facility are checked, as are the green belt, rainwater harvesting and any conditions specific to your consent. Units that keep these records in order rarely face difficulty. Units that cannot produce them often receive a show-cause notice even when the actual pollution levels are within limits.

Annual filings that keep your CTO safe

Holding a CTO brings yearly paperwork. Under Rule 14 of the Environment (Protection) Rules, 1986, every unit that needs consent must file an environmental statement in Form V for the financial year by 30 September. Units that generate hazardous waste must file an annual return under the Hazardous and Other Wastes Rules, 2016, by 30 June. Units with EPR obligations for plastic packaging, e-waste, batteries, tyres or used oil file returns on the CPCB portals. Monitoring reports must be submitted at the frequency stated in the consent.

Boards increasingly check these filings when considering a renewal, and missing returns are one of the commonest reasons for a renewal being kept pending. If you are behind, file the missing returns before you apply for renewal, not after the board raises the point.

A yearly compliance calendar for a CTO holder

Change of ownership, name or location

A CTO is granted to a particular occupier for a particular site. If the unit is sold, the company merges, or the name changes, the new owner should apply to the board to transfer the consent and inform it of the change; operating under a consent in someone else's name causes problems at renewal and during inspection. If the unit moves to a new site, fresh CTE and CTO are needed for the new location, because consent is tied to the site. Buyers of running units should insist on seeing the current CTO, the last few environmental statements and any pending notices before completing the purchase. See environmental due diligence.