Monday morning at a metal-finishing factory, the production manager received an important update. A new customer order could increase the plant’s daily production from 12 tonnes to 18 tonnes. The management team was ready to install additional machinery and begin production within the next few weeks.
However, during an internal compliance review, the environmental officer noticed something important. The factory’s existing Consent to Operate (CTO) covered only 12 tonnes of daily production. The proposed expansion would increase capacity by 50%, along with additional water consumption, wastewater generation and hazardous waste handling.
The management had assumed that because the factory already had CTO approval, the new production line could operate under the same certificate. The environmental officer advised reviewing the consent conditions and obtaining the applicable approvals before expansion.
This illustrative case study highlights an important issue for operational industries across India. Having a CTO certificate does not automatically mean every future change in production, machinery or pollution load is permitted.
For manufacturers, recyclers and industrial plant owners, understanding CTO approval for operational plants in India is essential for maintaining environmental compliance, avoiding regulatory disruptions and planning industrial expansion.
Consent to Operate (CTO) is an environmental approval administered by the concerned State Pollution Control Board (SPCB) or Pollution Control Committee (PCC). It allows an industrial facility to operate within the approved conditions relating to air emissions, wastewater discharge, production activities and pollution-control arrangements.
The requirement is primarily governed by two important laws: the Water (Prevention and Control of Pollution) Act, 1974, and the Air (Prevention and Control of Pollution) Act, 1981.
Businesses usually obtain Consent to Establish (CTE) during the project establishment stage and CTO before commencing regulated commercial operations. Once the facility becomes operational, the responsibility shifts from obtaining permission to maintaining compliance with the approved conditions.
An existing CTO commonly records the plant’s authorised products, production capacity, water consumption, wastewater generation, fuel usage and pollution-control equipment.
For example, if a manufacturing facility is approved for 20 tonnes of daily production, increasing output to 30 tonnes may require additional regulatory approval even if the existing pollution-control equipment appears adequate.
The actual approval route depends on the proposed change, the consent conditions, applicable environmental rules and the requirements of the concerned SPCB.
One of the most significant changes in India’s industrial environmental compliance framework came in January 2026.
The Ministry of Environment, Forest and Climate Change introduced amendments through G.S.R. 62(E) and G.S.R. 63(E), issued on 23 January 2026 and published in the Official Gazette on 27 January 2026.
These amendments revised the consent guidelines under the Air Act and Water Act.
Under the amended guidelines, CTO generally remains valid until cancelled in accordance with the applicable provisions. This replaces the earlier model of repeated validity-based renewals under the central guidelines.
Previously, the 2025 uniform framework prescribed CTO validity periods of 5 years for Red-category industries, 10 years for Orange-category industries and 15 years for Green-category industries. The January 2026 amendments replaced that periodic CTO validity provision.
However, this reform does not eliminate financial and operational compliance requirements.
The 2026 amendments allow State Governments and Union Territory administrations to determine one-time CTO fees for periods ranging from 5 to 25 years.
Once the selected fee period ends, further payment is required for the applicable extended period, even though the underlying consent continues until cancelled.
This distinction is especially important for existing factories holding older consent certificates with printed expiry dates.
Plant owners should verify the applicable state implementation procedure, fee-payment requirements and existing consent conditions before assuming that no further action is necessary.
A valid CTO can also be subject to cancellation if the industrial unit violates relevant consent conditions or environmental requirements.
Therefore, the practical focus has shifted from routine certificate renewal toward continuous compliance, fee-period management and amendments when operations change.
CTO requirements depend on the industrial activity, pollution potential, applicable exemptions and the regulations governing the facility.
Manufacturing industries involving process emissions, industrial wastewater, boilers, chemical handling or regulated waste generation commonly fall within the consent framework.
These include chemical manufacturing, metal processing, textiles, pharmaceuticals, food processing, recycling operations, engineering units and other regulated industrial activities.
Industries are classified into pollution categories such as Red, Orange, Green and White under the applicable CPCB classification framework.
Certain notified White-category activities are exempt from the ordinary consent requirement, subject to applicable conditions and intimation requirements. Businesses should confirm eligibility rather than treating all small factories as exempt.
For operational plants, the key question is not simply whether CTO was obtained earlier. Management must confirm that the existing permission accurately reflects the facility’s present operating conditions.
The documents required for a CTO application, expansion or amendment depend on the nature of the factory and the concerned Pollution Control Board.
An existing industrial facility should maintain updated records covering its legal identity, manufacturing process, pollution-control equipment and environmental performance.
The administrative documentation generally includes the company’s PAN, GST certificate, incorporation documents where applicable, land ownership or lease papers, plant layout and authorised signatory details.
The previous CTE, existing CTO, amendment orders and applicable Environmental Clearance should also be available.
Company information must remain consistent across the relevant regulatory records. Differences in factory addresses, operating entity names or investment details can lead to clarification requests.
Technical documentation should explain how the factory operates and how pollution is controlled.
Important records commonly include:
For an operational plant, recent monitoring results are especially useful because they demonstrate actual environmental performance rather than merely proposed pollution-control arrangements.
Where required, laboratory reports should be obtained through laboratories acceptable to the relevant authority.
The application process begins with identifying what regulatory action the factory actually needs.
A plant continuing unchanged operations may not need a fresh CTO application under the amended framework. A factory installing additional production equipment may require CTE for expansion and subsequent CTO amendment or expansion approval, depending on the circumstances.
The first step is to review the latest consent order and its conditions.
Check the approved products, production capacity, water consumption, wastewater generation, fuel, emissions and waste-management arrangements.
These details should be compared with actual plant records. If the factory’s operations have changed since the last approval, the differences must be assessed before deciding the next step.
The plant’s EHS or compliance team should evaluate the functioning of pollution-control equipment and review available environmental monitoring data.
Examining the previous 3 to 6 months of operational records can provide a useful internal performance baseline. This is a recommended assessment period, not a universal statutory requirement.
The review should identify whether the factory is meeting relevant discharge standards, maintaining adequate treatment capacity and complying with waste-management conditions.
Based on the review, management should determine whether it needs a first-time CTO, expansion approval, consent amendment, transfer, fee-period payment or another prescribed action.
The applicable route should be confirmed through current SPCB instructions before proceeding.
Prepare the required technical reports, updated documents, relevant monitoring results and prescribed declarations.
Applications are generally processed through the relevant online consent management system. The 2026 framework also provides for a unified consent and authorisation portal, with existing arrangements continuing until the new system becomes operational.
The Pollution Control Board may examine the documents, seek clarification or verify the facility.
Once the relevant approval is issued, the plant should confirm that all approved capacities, processes and pollution-control conditions have been recorded correctly.
There is no single CTO application fee applicable to every industrial facility across India.
Government fees are determined under the relevant state or Union Territory framework and depend on factors such as capital investment, the consent category and applicable fee provisions.
The 2026 guidelines clarify that capital investment includes fixed assets such as land, buildings, machinery, equipment and pollution-control infrastructure, without depreciation. Running operational and maintenance expenditure is not included in this definition.
For leased assets, the amended fee framework also contains specific valuation provisions, including a calculation involving 10 times the annual lease value or the applicable guidance value, whichever is higher.
Actual fees must therefore be calculated using the appropriate state schedule rather than a generic nationwide estimate.
Under the amended central guidelines, the prescribed decision periods for CTO expansion or amendment applications are:
These periods apply within the relevant statutory framework and should not be interpreted as guaranteed approval dates.
Incomplete documentation, regulatory queries, inspections and other applicable requirements may affect the overall project timeline.
For operational factories planning expansion, regulatory assessment should begin before machinery installation or increased production.
A factory’s environmental responsibilities continue throughout its operating life.
Management must ensure that the pollution-control systems described in the consent are functioning properly and that emissions, wastewater and waste handling remain within the applicable limits.
Factories generating industrial wastewater must maintain the required treatment arrangements and comply with approved discharge or reuse conditions.
For example, a facility generating 40 kilolitres per day (KLD) of wastewater should ensure that its installed treatment arrangement is suitable for the actual flow and pollution load.
Merely having an ETP on the plant layout is insufficient if the system does not operate effectively.
Boilers, furnaces, DG sets and process-emission sources must comply with applicable environmental standards.
The factory should maintain dust collectors, scrubbers, bag filters or other required pollution-control equipment and arrange monitoring at the prescribed frequency.
Changes in fuel, boiler capacity or process emissions may require review of existing consent conditions.
Hazardous waste must be handled according to applicable authorisation conditions and the Hazardous and Other Wastes (Management and Transboundary Movement) Rules, 2016.
Operational facilities should maintain accurate waste-generation, storage, transportation and disposal records.
Where applicable, annual hazardous waste returns and related statutory records must also be maintained.
Rule 14 of the Environment (Protection) Rules, 1986 provides for the annual environmental statement in Form V.
For covered facilities, the statement for the financial year ending 31 March is required by 30 September, subject to the applicable legal provisions.
A plant may also have industry-specific monitoring, online reporting or waste-management obligations.
Maintaining a compliance calendar helps ensure that these responsibilities are not overlooked.
An existing CTO covers the industrial activities and conditions approved by the relevant authority.
When operations change materially, management should assess whether the consent needs to be amended.
Common changes include increased production capacity, installation of additional machinery, introduction of new products, changes in raw materials, higher wastewater generation and modifications to emission-control arrangements.
Consider a factory operating with an approved production capacity of 50 tonnes per day. If management proposes increasing it to 75 tonnes per day, the planned expansion represents a 50% capacity increase.
Such a proposal should be examined for additional pollution load, utility requirements, environmental-clearance applicability and the need for CTE and CTO approvals.
Even where no additional land is required, increasing capacity within the existing factory may still trigger regulatory requirements.
The following case study is illustrative and uses hypothetical plant data to explain how an operational compliance review can identify approval requirements.
A metal-finishing factory was operating with a CTO covering 12 tonnes of finished components per day.
To meet additional customer demand, management planned to expand production to 18 tonnes per day, representing a 50% increase.
The technical team estimated that water consumption would increase from 26 KLD to 34 KLD. Industrial wastewater generation was expected to increase from approximately 18 KLD to 24 KLD.
However, the existing effluent treatment plant had a rated hydraulic capacity of only 20 KLD.
This created two concerns. The proposed production capacity exceeded the quantity covered by the existing consent, and the expected wastewater flow exceeded the treatment system’s rated capacity by 4 KLD.
Before proceeding, the project team needed to reassess its pollution load, treatment design, consent conditions and applicable expansion approvals.
A suitable technical review would examine whether additional treatment capacity, process modifications or other environmental safeguards were required.
The case demonstrates why an industrial expansion assessment should consider production capacity, pollution load and treatment infrastructure together.
It also shows why the 2026 change to perpetual CTO validity should not be misunderstood as unrestricted permission to expand production.
One frequent mistake is treating CTO as a document that only needs attention when its fee period or displayed expiry date approaches.
Operational conditions can change much earlier. Factories may introduce new machinery, change fuels or increase wastewater generation without reviewing whether the approved consent remains adequate.
Another issue is inconsistent technical information. A machinery list may show one capacity while production records, electricity consumption or process documentation indicate a different operating level.
Some industries also maintain incomplete monitoring records or fail to document the closure of previous inspection observations.
A practical way to reduce these problems is to conduct a condition-wise compliance assessment, assign responsibility for each requirement and periodically review the supporting records.
Where non-compliance is identified, the business should document corrective actions and follow applicable regulatory directions rather than assuming that a pending application automatically regularises past operations.
Before an inspection, amendment application or major operational change, plant management should review five areas.
First, confirm that the latest CTO accurately identifies the operating entity, factory location and approved manufacturing activities.
Second, compare permitted capacity with actual production records and any planned expansion.
Third, verify that water treatment, air pollution-control and waste-management arrangements remain adequate for actual operations.
Fourth, review monitoring reports, statutory filings, consent fee records and previous regulatory correspondence.
Finally, identify any operational change requiring prior approval and establish the appropriate submission route before implementation.
The purpose of this review is to identify compliance gaps early and maintain a reliable record of the factory’s environmental performance.
No. The January 2026 amendments provide that CTO generally remains valid until cancelled under the amended framework. However, applicable consent fees, operational conditions and reporting obligations continue. Businesses should confirm the current state implementation procedure.
Not automatically. If the proposed increase changes the approved capacity, process or pollution load, additional regulatory approval may be required. The existing consent conditions and applicable expansion requirements should be reviewed first.
CTO government fees depend on the applicable state schedule and relevant investment and consent parameters. Under the amended framework, one-time fee periods may range from 5 to 25 years. Professional consultancy charges are separate from government fees.
Operating without a required consent can result in regulatory action under the applicable environmental laws. The consequences depend on the circumstances and directions issued by the competent authority. A business should seek appropriate advice rather than assume that an application provides automatic permission.
No. Recycling facilities may require separate registration or authorisation under the relevant waste-management rules, in addition to the applicable Air and Water consents. Requirements depend on the waste stream, facility activities and regulations.
CTO approval for operational plants in India is no longer simply a question of periodic renewal. The 2026 amendments have introduced continuing CTO validity until cancellation, while retaining consent fees, environmental safeguards and regulatory oversight.
For an operational factory, the most important responsibility is ensuring that actual production, pollution-control infrastructure and waste-management practices remain consistent with the applicable approval conditions.
Before expanding capacity, introducing new machinery or changing industrial processes, businesses should assess the environmental implications and obtain the required permissions.
A structured compliance review can help factory owners maintain regulatory readiness and make better-informed operational decisions.
Green Permits Consulting LLC supports manufacturers, recyclers, MSMEs and industrial facilities with CTO documentation, compliance assessments, consent amendments and coordination with the concerned Pollution Control Board.
Whether your factory needs an existing-consent review, support with applicable fee-period requirements or assistance with production-capacity expansion, our team can help identify the relevant compliance requirements.
Visit www.greenpermits.in to learn more about our environmental approvals and industrial compliance consulting services.
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