TNPCB consent to establish and consent to operate
Who this applies to
- You are establishing a plant or an outlet, or increasing capacity, product, process or pollution load. Consent to Establish is the permission for that step.
- You are about to operate. Consent to Operate is a separate permission, after the controls in the establish consent are in place.
- Your project may also need environmental clearance. Clearance appraises a scheduled project. It does not authorise the discharge or the plant under the Water Act or the Air Act.
What the consent actually is
Consent to Establish and Consent to Operate are permissions under the Water (Prevention and Control of Pollution) Act, 1974 and the Air (Prevention and Control of Pollution) Act, 1981. Consent to Establish covers setting up the plant or the outlet and the controls you propose; Consent to Operate authorises you to run it, on the conditions in that order.
Neither consent is environmental clearance. If your project needs prior environmental clearance and has obtained it, Central notifications of 12 November 2024 (G.S.R. 702(E) under section 21 of the Air Act and G.S.R. 703(E) under section 25 of the Water Act) exempt the plant from a separate consent to establish, though you still need consent to operate. The notifications have since been amended, so check the current text, and how TNPCB applies it, before you rely on the exemption. The reverse also holds: a project the EIA Notification does not list can need consent with no clearance at all, and conditions on a consent do not cure a failure to obtain clearance that the Notification requires.
TNPCB takes applications on the Online Consent Management and Monitoring System (OCMMS). The portal is only the filing route; the permission is the consent order and the conditions on it.
What it costs to get wrong
Establishing or operating without the consent the Acts require, exceeding a limit, or ignoring a direction, can lead to regulation or closure directions, and to prosecution under the Water Act and the Air Act as amended. This page does not state a fine or a term of imprisonment. Quote a penalty only from the text that applies on the date of the offence.
In practice the more common cost is a file that describes a different product, pollution load or gross fixed asset figure from the plant that was actually built. An expansion that surfaces for the first time at renewal of consent to operate has been disclosed too late.
The process
Classify the activity
Start from the latest TNPCB category list, and do not assume a White-category label from a trade description. Then work out whether environmental clearance, coastal clearance, land use, building permission, fire approval, factory approval, a PESO licence or a groundwater permission has to come first for this project.
Apply for consent to establish
Apply under the Water Act and the Air Act through OCMMS before you establish the plant or the outlet, and before pollution-generating construction or installation. An expansion of capacity, product, process or pollution load is its own establish application. A direct consent to operate, skipping establish, is available only where an official procedure says so.
The fee depends on the current Board proceeding and the basis it uses, often gross fixed assets. No fee table is printed here: use the current OCMMS calculation and keep your working.
TNPCB's published procedure asks for land documents, planning or local-body records, layout, process and material information, water and wastewater details, air-pollution sources and controls, waste details, and environmental clearance where it applies. The exact set varies by sector.
Build what was consented, then apply to operate
Build the project and the control systems the establish consent describes, then apply for consent to operate before commercial operation, with evidence of that construction, commissioning data, analysis reports and any linked authorisation. Trial production is allowed only where the consent or order expressly permits it.
Renew, and amend before you change the plant
Apply for renewal before the consent expires, with compliance reports, recent analysis, production data and the status of other authorisations. A change of product mix, quantity, fuel, stack, effluent outlet, water use, machinery or layout can need an expansion consent, and a matching change to clearance, fire approval, the factory file or a PESO licence. Operate only within the products, quantities, outlets, emissions and conditions on the current order.
What continues after the order
Once the order issues, you have to stay within the emission and effluent limits, run the control systems, keep logs and monitoring records, and send waste only by an authorised route (see hazardous-waste authorisation). A consent condition can also require online monitoring, water meters or a sector-specific control. The water quantities on this file should match the groundwater and clearance papers for the same plant.
Published processing targets are administrative service standards, not a guarantee that a deficient application, or one waiting on another department, will be decided in that time.
Common failure points
- Treating environmental clearance as consent to establish, or consent to establish as consent to operate.
- Using an outdated category, or claiming White-category treatment without the exact notified entry.
- Understating gross fixed assets or the pollution load.
- Installing a product or a process that the establish consent does not describe.
- Operating on an expired consent to operate.
- Assuming a capacity increase needs no consent because there is no new building. Pollution load, product and process can drive an expansion consent even when civil work does not.
Setting up or expanding a unit that discharges or emits?
Send us the process, the products and the pollution category you have been given. We will tell you which consents apply, and whether environmental clearance has to be in hand first.