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Consent for Operation (CFO Air and Water), also known as Consent to Operate (CTO), is granted to industrial units before they can start operation. Under section 25/26 of the Water Act of 1974 and section 21 of the Air Act, of 1981, industries that have the potential to pollute the air and water must apply for this Pollution No Objection Certificate at their concerned State Pollution Control Board (SPCB) or the Pollution Control Committee (PCC). The industry needs pre-operation NOC before it can start the intended operations. The Consent for Operation (CFO)is needed by green, orange and red category industries. Some State Pollution Control Boards also maintain a list of exempted categories (white category) of Industries that do not need consent and can function in any area in the respective state subject to site clearance by the local authority.
Once the industrial unit is established, along with the required pollution control equipment, the applicant must obtain consent to operate (CTO/CFO) for the unit. As this consent is given for a particular period, which must be renewed periodically, industrial units must ensure timely NOC renewal and adhere to the terms and post-compliances issued by the Board to the specific unit.
Once the unit is established along with the required pollution control systems, the entrepreneur must obtain consent to operate from the State Board before initiating the operational activities. The following are the stages in the consent management process.
To simplify the Consent management and monitoring mechanism and promote the ease of doing business, states have adopted the Online Consent Management and Monitoring System (OCCMS) for receiving applications for fresh Consent to Establish (CTE) and Consent for Operation (CFO)as well as their renewal. Apart from the Pollution NOC, the authorisations needed by specific units handling plastic waste, electronic waste (E-waste), hazardous waste, biomedical waste, etc., require authorisation that the concerned SPCB/PCC also issues. Many states have adopted a Consolidated Consent and Authorisation (CC&A), which provides for a single-point application and clearance of the consent.
The section Officer scrutinises the application and sends it to supervising Officer (Senior Scientific Officer / Scientific Officer / Environmental Engineer), who examines and makes recommendations if needed.
The Board assigns anInspecting Officer who will visit the site after making a suitable appointment and inspect the complete facility in the owner's presence or a representative authorised by the owner. The officer is an expert and will make a recommendation and prepare an inspection report based on the findings and sample analysis of the trade effluent.
Based on the recommendations of the inspecting officer and addressing all the concerns raised at the time of inspection, the Consent for Operation will be granted/rejected by Chairman / Member Secretary as per the delegation of powers in the concerned Pollution Control Board.
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After the site construction is complete and the entrepreneur has successfully installed all required waste management and pollution abetment equipment as per the applicable standards, he will apply for CFO. The process can usually take 30 days. Therefore, the unit must make the application after considering this time. Apart from this, the unit must also ensure strict adherence to the applicable discharge standards of the pollutants in the trade discharge generated. The following limits must be ensured.
Air pollution control devices must test emissions from chimneys, exhausts, and vents after exhaust treatment. The PPM concentration of the following pollutants must be regulated:
Effluent and Wastewater discharge must be tested and regulated. Various parameters must be met at the time of site inspection
The ambient and operating noise level at the facility must be tested and regulated as per the directions issued by the Board in the following circumstances:
The approving authority for all green category units is the Environment Engineer, and the application is scrutinised at the regional office. However, the following table gives the list of approving authorities for different categories.
|
Orange Category |
Approving Authority |
Location |
|
Units with Upto 1 Cr investment |
Environment Engineer |
Regional Office |
|
Units with Above 1 Cr Investment |
Joint Chief Environment Engineer |
Zonal Office |
|
Red Category |
Approving Authority |
Location |
|
Units which do not require Environment Clearance |
Joint Chief Environment Engineer |
Zonal Office |
|
Units/ Projects which require Environment clearance but less than Rs 5 Cr investment |
Joint Chief Environment Engineer |
Zonal Office |
|
All units/projects which require Environment Clearance and above Rs 5 Cr investment |
Member Secretary |
Head Office |
Although consent is granted for air and water, the following sections separately outlay the necessary paper requirement in both cases.
Consent to operate for the green category is awarded for a longer period as compared to the orange and red category industries. However. Every unit industry needs to renew the consent for operation well before the NOC expires. The following table denotes the validity period of different industries.
|
Projects |
Validity Period |
|
Red Category (Large, Medium, Small & Micro-scale units) |
5 years |
|
Orange Category (Large, Medium, & Small scale) |
10 years |
|
Orange Category (Micro-scale) |
10 years |
|
Green Category (Large scale) |
15 Years |
|
Green Category (Medium scale) |
15 Years |
|
Green Category (Micro & Small scale) |
15 Years |
Primary issues for considering an application for CFO include assessing the potential environmental impacts on water, air and soil pollution, evaluation of pollution management plan and engineering drawings. Apart from this, the compatibility and compliance of the proposal to other rules/ regulations/ standards as notified by the State or the Central Governments.
The feasibility report includes details of engineering designs and drawings of the proposed Pollution Control Measures for the treatment of wastewater, solid waste and emissions. This report must be supported by information about likely wastewater quality, air emission quality, safe disposal of wastes,equipment efficiency, mode of final disposal of treated effluent and emissions and air quality after treatment and before discharge.
Industrial units usually adopt water conservation measures to ensure minimum water consumption in their functioning. Therefore unit must take all other clearances from concerned agencies whenever required. Thus, ground water-based proposals of new unitsmust get clearance from CGWA before applying for CFO.
The following industries require category-specific approvals form the state government apart from the abovementioned Documents.
There are various parameters that must be regulated, such as
Emissions from chimneys:
Some State Pollution Control Boards also maintain a list of exempted categories (white category) of Industries that do not need consent and can function in any area in the respective state subject to site clearance by the local authority. These units must notify the Pollution Board and the copy permission granted to them by the local municipal authority or any authorised regulatory body.
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Written by Aarya Pokharel. Last updated on Nov 11 2025, 09:50 PM
Aarya Pokharel brings 3 years of solid experience in legal research and compliance. Her expertise spans tax filing, secretarial compliances, and advisory services, with a strong focus on delivering precise legal research and strategic advisory support.
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