EIA Process in India — Category A & B, Scoping, Public Hearing Explained

Statutory Basis: EIA Notification 2006

The Environmental Impact Assessment (EIA) Notification 2006, issued under Section 3 of the Environment Protection Act, 1986, mandates prior environmental clearance from MoEFCC for a defined list of projects and activities before construction begins.

The Notification replaces the 1994 EIA Notification and introduces a more structured, multi-stage process with timelines, public participation provisions, and project-level conditions. As of 2024, over 40 amendments have been issued clarifying project thresholds, procedural requirements, and exemptions for specific categories.

The EIA process is distinct from — but upstream of — the SPCB consent (CTE/CTO) process. In the project lifecycle: EIA → EC → CTE → Construction → CTO → Operations. EC is the necessary precondition for CTE in all cases where the EIA Notification applies.

Project Classification: Category A, B1, and B2

The EIA Notification Schedule classifies projects into categories based on scale, environmental sensitivity, and locational requirements:

Category A examples (above threshold): thermal power ≥500 MW; mining ≥50 ha; petrochemicals; bulk drug manufacturing; integrated steel plants. Category B examples (below threshold): small hospitals, cement grinding units, hotel/resorts in hill areas, building construction over a certain area.

Stage 1: Screening

Screening is the first formal step — the process of determining whether a proposed project falls within the Schedule to the EIA Notification and, if so, into which category (A, B1, B2). Key points:

• Project proponents submit Form-I (basic project details) to MoEFCC (for Category A) or SEIAA (for Category B).
• The regulatory authority verifies project type, capacity, and location against the Schedule thresholds.
• Projects below all applicable thresholds and not in sensitive areas may receive a "Not Required" determination — they proceed directly to SPCB consent (CTE).
• Projects in eco-sensitive zones, CRZ areas, or tribal areas may be upgraded to a higher category regardless of capacity.

Stage 2: Scoping and Terms of Reference

For Category A and B1 projects, after Form-I submission, the EAC or SEAC issues Terms of Reference (ToR) — a scoping document specifying what environmental baseline data must be collected and which impact categories must be assessed in the EIA study. Typical ToR elements include:

• Baseline data requirements: Air quality (24-hour PM₁₀, PM₂.₅, SO₂, NOₓ), groundwater quality, surface water quality, soil characterisation — monitored over a 3-km Study Area for ≥3 seasons.
• Impact assessment scope: Construction-phase impacts (dust, noise, traffic), operation-phase impacts (emissions, effluents, water demand), and worst-case/cumulative scenario modelling.
• Social impact: Population displacement, land acquisition, livelihood impacts, health risk assessment if hazardous substances are handled.
• Risk assessment: Fire, explosion, toxic release — HAZOP and consequence modelling for chemical/petrochemical projects.

ToR issuance is supposed to occur within 30 days of Form-I submission, though in practice 1–3 months is common. ToR is valid for 3 years — EIA study must be completed within this period.

Stage 3: EIA Study and Report Preparation

Based on the ToR, the project proponent engages an accredited EIA Consultant (certified by Quality Council of India) to conduct the EIA study and prepare the EIA Report (also called Environment Impact Assessment Report or EIA/EMP Report). The report structure:

1. Executive summary (in English and regional language)
2. Introduction: project description, need and objectives
3. Project description: process, utilities, land use, infrastructure
4. Description of environment: baseline data analysis (air, water, land, socio-economic)
5. Anticipated environmental impacts and mitigation measures
6. Environment Management Plan (EMP): monitoring parameters, frequency, responsible parties
7. Risk assessment and disaster management plan
8. Post-project environmental monitoring programme
9. Summary and disclosure

For water-intensive industries, the EIA report must include a detailed water budget: source, quantity, quality, wastewater characterisation, ETP design basis, and treated effluent disposal mode — all aligned with CPCB MINAS for the industry type.

Stage 4: Public Consultation and Hearing

Public Consultation has two components:

1. Public Hearing: Conducted by the SPCB at or near the project site. A 30-day public notice is issued. Any person residing within the study area can attend and raise objections. The SPCB compiles all responses into a summary report sent to MoEFCC/SEIAA.
2. Written responses: NGOs, government departments, and individuals may submit written comments to MoEFCC/SEIAA within 45 days of the EIA report being made available on the MoEFCC website.

After public consultation, the project proponent prepares a Response to Public Comments document — a point-by-point reply to objections raised, including any EMP modifications accepted. This forms part of the appraisal package submitted to EAC/SEAC.

Industries in industrial estates or clusters with master plan clearances may be exempted from individual public hearings under the 2016 amendment to the EIA Notification — provided the industrial estate itself underwent public consultation at the estate-level EIA stage.

Stage 5: Appraisal and Environmental Clearance

The EAC (for Category A) or SEAC (for Category B1/B2) appraises the complete package — Form-I, EIA Report, public consultation summary, and proponent responses. The appraisal process:

1. Presentation: Project proponent and EIA consultant present to the EAC/SEAC; committee asks technical questions.
2. Recommendation: EAC recommends EC (with or without modifications), deferral (seeking additional information), or rejection. SEAC does the same for state-level projects.
3. EC issuance: MoEFCC issues the formal EC Order for Category A; SEIAA issues for Category B. EC includes specific conditions under four themes:
   • General Conditions (legal compliance, reporting obligations)
   • Specific Conditions: Air (stack emission limits)
   • Specific Conditions: Water (discharge limits, ETP requirements, ZLD if applicable)
   • Specific Conditions: Solid/Hazardous Waste

EC Conditions and Post-Clearance Compliance

EC is not the end — it is the beginning of compliance obligations that run through the full project lifecycle:

• Half-yearly compliance reports: Submitted to MoEFCC and SPCB every 6 months (May 1 and November 1) covering all EC conditions.
• EMP implementation: All mitigation measures committed in the EIA must be implemented and are subject to SPCB inspection.
• Construction-phase compliance: Dust suppression, noise barriers, construction waste management — monitored by SPCB during site visits.
• Water conditions (key for industries): EC typically specifies ETP design parameters, SPC (Specific Pollution Coefficient), ZLD obligation if in notified area, and groundwater extraction cap.
• OCEMS: Many EC orders for Red-category industries specifically mandate OCEMS installation at the ETP outlet and linkage to SPCB server within 6 months of commissioning.
• Corporate Environment Responsibility (CER): Under 2018 EIA amendment, project proponents must spend 2% of project cost on CER activities in the local community — similar to CSR but environment-focused.

Frequently Asked Questions

Disclaimer: This article is for general informational purposes only. EIA thresholds, categories, and procedures are subject to amendment. The EIA Notification 2006 has seen 40+ amendments; always verify against the latest gazette notification at MoEFCC. Information reflects the regulatory position as of June 2026.