Consent to Establish & Operate (CTE/CTO)

Consent to Establish (CTE) and Consent to Operate (CTO) are approvals granted under the Water (Prevention and Control of Pollution) Act, 1974 and the Air (Prevention and Control of Pollution) Act, 1981 by the State Pollution Control Board (SPCB) with jurisdiction over your site — DPCC in Delhi, MPCB in Maharashtra, UPPCB in Uttar Pradesh, and so on. Every industrial or commercial unit that discharges effluent or emissions needs both, in sequence, before and after construction.

CTE/CTO consent exists to ensure that any unit discharging effluent or emissions operates within limits the local air-shed and water bodies can safely absorb, with the two-stage structure specifically designed to catch a mismatch between what was approved on paper and what actually gets built, before a unit starts commercial operations.

The consent process runs in two stages everywhere in India, regardless of which state board administers it: Consent to Establish (CTE), sought before construction begins, confirms the proposed unit, its process, and its planned pollution-control infrastructure are acceptable in principle; Consent to Operate (CTO), sought once construction is complete, confirms the actual installed infrastructure — effluent treatment, air pollution control equipment, stack heights — matches what was approved and is functioning before commercial operations begin. Skipping straight to operations without both stages, or operating on an expired CTO, carries the same penalties as never having applied.

Every state board classifies units under the same Red/Orange/Green/White pollution-potential categories, which determines how detailed the technical review is and whether a site inspection is mandatory — Red and Orange category units (chemical, pharma, heavy engineering) generally face fuller review, while Green/White category units move through a lighter-touch process. What differs meaningfully from state to state is the online filing portal, the exact fee schedule (typically linked to project investment size and category), and the validity band within the standard 5–15 year range. Because of that, once you know which state your site sits in, the state-specific guidance — for Delhi (DPCC), Uttar Pradesh (UPPCB), Haryana (HSPCB), Maharashtra (MPCB), Madhya Pradesh (MPPCB), Karnataka (KSPCB), and other states — is the faster reference; this page is the starting point if you're still confirming jurisdiction, comparing states, or want the concept explained once before drilling into a specific board's process.