EIA Notification 2006 Explained: Categories, Timelines & What Triggers Clearance
A plain-language breakdown of the MoEF&CC EIA Notification 2006 — which projects need clearance, at what level, and how long it takes.
The Environmental Impact Assessment (EIA) Notification, S.O. 1533(E), issued by India's Ministry of Environment, Forest and Climate Change (MoEF&CC) on September 14, 2006 is the primary legal instrument governing when and how environmental clearance must be obtained before a project commences. It has been amended over 50 times since 2006 — keeping track of current obligations requires specialist knowledge.
Category A vs Category B Projects
Category A projects (appraised by the Expert Appraisal Committee at the central MoEF&CC level) are larger in scale, with potential for interstate or major environmental impact. These include thermal power plants above 25 MW, industrial estates above 500 ha, and mining projects above 50 ha. Category B projects (appraised by the State Expert Appraisal Committee, SEAC, at the SEIAA level) are smaller scale. Category B1 requires full EIA; Category B2 may be screened out.
Projects Requiring Clearance (Schedule)
The EIA Notification's Schedule lists 39 project/activity categories across sectors including: mining (coal, minerals, sand), thermal, nuclear, river valley, industrial estates, ports & harbours, airports, defence, highways, pipelines, townships, SEZs, tourism, and more. Whether a specific project triggers clearance depends on its size, capacity, and location (ecologically sensitive zones attract lower thresholds).
The General Condition (GC)
The General Condition states that irrespective of Category, any project within 10 km of a Protected Area, international boundary, ecologically sensitive area, or inter-state boundary must be treated as Category A. This catches many projects that developers assume are Category B.
Timelines to Expect
Category B2 screening: 60 days from submission. Category B1 EIA (SEAC): 4–9 months from TOR grant to EC, if no public hearing complications. Category A EIA (EAC/MoEF&CC): 12–24 months. Delays are common when baseline data is inadequate, public hearings are contested, or the appraisal committee requests additional studies. A well-prepared submission by an experienced consultant consistently achieves the lower end of these ranges.
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