1. Conceptual Framework & Definitions

In the Environmental Impact Assessment (EIA) pipeline, Screening and Scoping represent the foundational gatekeeping stages. They determine whether a proposed developmental project requires environmental scrutiny and, if so, define the exact scientific boundaries of the study before capital and field resources are deployed.

Screening (Stage 1 — "Whether to assess?"): The initial filtering process that determines whether a proposed development project requires a mandatory EIA study and, if required, the level/depth of assessment needed (full EIA or application-level appraisal).
Scoping (Stage 2 — "What to assess?"): The analytical process that establishes the spatial, temporal, and thematic boundaries of the EIA study, identifies key environmental impacts to be investigated, and formulates the binding Terms of Reference (ToR) for baseline data collection.

SCREENING & SCOPING POSITIONING IN THE EIA PIPELINE

Proposed Development Project (Mining, Power, Infrastructure, Industry)
                    │
                    ▼
STAGE 1: SCREENING  ──► Determines Category (Category A / B1 / B2)
                    │   • Category B2 ──► Exempt from EIA & Public Hearing ──► Direct Appraisal
                    ▼
STAGE 2: SCOPING    ──► Formulates Terms of Reference (ToR)
                    │   • Defines study boundary (e.g., 10 km radius) & baseline parameters
                    ▼
Baseline Data Collection ──► Draft EIA Report ──► Public Consultation ──► Appraisal & Clearance

2. The Screening Process (EIA Notification, 2006)

Under the EIA Notification, 2006 (promulgated under Section 3 of the Environment (Protection) Act, 1986), screening categorizes projects based on sector type, spatial scale, production capacity, and geographical location sensitivity:

EIA NOTIFICATION 2006 SCREENING CATEGORIZATION

                         PROPOSED DEVELOPMENTAL PROJECT
                                       │
     ┌─────────────────────────────────┴─────────────────────────────────┐
     ▼                                                                   ▼
CATEGORY A PROJECTS                                       CATEGORY B PROJECTS
• High national/regional impact                           • Medium to localized impact
• Appraised at Central Level by MoEFCC & EAC              • Appraised at State Level by SEIAA & SEAC
• Screening is AUTOMATIC (No discretionary screening)     • Screened at State Level into B1 or B2
• Full EIA & Public Hearing Mandatory                      │
                                                        ┌────────────────┴────────────────┐
                                                        ▼                                 ▼
                                                 CATEGORY B1                       CATEGORY B2
                                                 • Full EIA Study Required         • EXEMPT from EIA Study
                                                 • Public Hearing Mandatory        • EXEMPT from Public Hearing
                                                 • Formulates ToR via SEAC         • Fast-track appraisal via Form 1

A. Category A Projects (National Level)

Appraisal Authority: Central Government in the Ministry of Environment, Forest and Climate Change (MoEFCC) on the recommendation of the central Expert Appraisal Committee (EAC).
Screening Rule: Automatic—all Category A projects listed in Schedule I (e.g., major ports, nuclear plants, large thermal power plants >500 MW, petroleum refineries, national highways) implicitly require a comprehensive EIA study and public consultation.

B. Category B Projects (State Level)

Appraisal Authority: State/UT Environment Impact Assessment Authority (SEIAA) on the recommendation of the State Expert Appraisal Committee (SEAC).
Discretionary Screening: Category B projects are screened at the state level using information provided in Form 1 / Form 1A and the Pre-Feasibility Report to divide them into two streams:
1. Category B1 Projects: Projects with moderate environmental footprints requiring a mandatory full EIA report and Public Hearing (e.g., medium industrial units, state highway expansions, regional mining leases).
2. Category B2 Projects: Projects with localized, minor environmental footprints that are exempted from preparing a formal EIA report and holding a Public Hearing. They are appraised directly based on Form 1/1A, conceptual plans, and Environmental Management Plans (EMPs).

C. General Conditions (GC) / Location Sensitivity Trigger

Automatic Central Escalation: If a Category B project is located wholly or in part within 5 km or 10 km (as specified) of an ecologically sensitive boundary—such as an Eco-Sensitive Zone (ESZ), National Park, Wildlife Sanctuary, Protected Area, Critically Polluted Area notified by CPCB, or International Border—it is automatically treated as a Category A project and transferred to the Central MoEFCC/EAC for appraisal.

3. The Scoping Process & Terms of Reference (ToR)

Scoping is the second stage of the EIA process, applicable strictly to Category A and Category B1 projects.

SCOPING WORKFLOW & TERMS OF REFERENCE (ToR) ISSUANCE

Project Proponent Submits Form 1, Form 1A, & Pre-Feasibility Report on PARIVESH 2.0 Portal
                               │
                               ▼
Technical Scrutiny by EAC (Central) or SEAC (State)
                               │
                               ├─► Site Visits & Expert Inputs on Sectoral Vulnerabilities
                               ├─► Identification of Baseline Data Parameters (Air, Water, Soil, Biodiversity, Socio-Economic)
                               └─► Determination of Spatial Boundaries (e.g., 10 km Radius) & Temporal Limits
                               │
                               ▼
Formulation & Issuance of Binding "TERMS OF REFERENCE" (ToR)
                               │
                               ▼
Baseline Data Collection Commences (Minimum 1 Non-Monsoon Season)

A. Key Objectives of Scoping

Define Spatial Boundaries: Establish the physical study area (typically a 10 km radius around the project boundary) for collecting baseline environmental data.
Define Temporal Limits: Specify the duration of baseline sampling (mandating field monitoring over at least one non-monsoon season, covering 3 months).
Identify Key Environmental Parameters: Identify critical site-specific parameters—such as ambient air quality (\(\text{PM}{10}, \text{PM}{2.5}, \text{SO}_2, \text{NO}_x\)), surface/groundwater hydrology, soil erosion potential, local flora/fauna, forest land involvement, and socio-economic displacement.
Evaluate Project Alternatives: Require the proponent to evaluate alternative sites, process technologies, and raw material inputs to choose environmentally superior options.

B. Terms of Reference (ToR) & Auto-ToR System (PARIVESH 2.0)

Terms of Reference (ToR): A statutory document issued by the appraisal committee (EAC or SEAC) that dictates the mandatory list of studies, tests, field data, and impact predictions that the consultant must address in the EIA report.
Standard ToRs: MoEFCC has published standardized sector-specific ToRs for 39+ industrial and infrastructure sectors to streamline scoping.
Auto-ToR Mechanism: To eliminate administrative delays, the PARIVESH 2.0 digital portal auto-generates standard ToRs upon submission of Form 1 for specified project sectors if the EAC/SEAC does not prescribe customized ToRs within 30 days.
Validity of ToR: Issued ToRs remain valid for 3 years (extendable to 4 or 5 years for major river valley, mining, and hydroelectric projects) during which baseline data must be collected and the draft EIA report submitted.

4. Screening vs. Scoping: Structural Comparison

Parameter / Dimension	Screening (Stage 1)	Scoping (Stage 2)
Primary Question	"Does this project require an EIA study, and at what level?"	"What specific impacts and parameters must be studied in the EIA?"
Applicability	Applied to ALL new, expansion, or modernization project proposals.	Applied ONLY to Category A and Category B1 projects (Category B2 is exempt).
Key Output	Project Classification: Category A, B1, or B2.	Binding Terms of Reference (ToR) document.
Input Documents	Form 1, Form 1A, and Pre-Feasibility Report.	Form 1, Form 1A, Pre-Feasibility Report, and Site Inspection reports.
Decision Maker	MoEFCC (Category A) or SEIAA (Category B).	Expert Appraisal Committee (EAC) or State EAC (SEAC).
Public Involvement	None (purely administrative/technical classification).	Limited (public inputs considered during baseline mapping & site identification).

5. Institutional Roles & Digital Workflow (PARIVESH 2.0)

PARIVESH 2.0 DIGITAL CLEARANCE INTEGRATION

Project Proponent Submits Application Online (Form 1 / 1A + Pre-Feasibility Report)
                               │
                               ▼
GIS Spatial Screening & Overlay Check (Automated overlap flags with ESZs, Forests, PAs)
                               │
            ┌──────────────────┴──────────────────┐
            ▼                                     ▼
Category A (MoEFCC / EAC)                   Category B (SEIAA / SEAC)
  │                                           │
  ▼                                           ├─► B2 ──► Direct Appraisal (No EIA/PH)
EAC Scoping Meeting                           └─► B1 ──► SEAC Scoping Meeting
  │                                                       │
  ▼                                                       ▼
Issuance of Central ToR                                 Issuance of State ToR
  │                                                       │
  └───────────────────────────┬───────────────────────────┘
                              ▼
            1 Non-Monsoon Baseline Data Collection

PARIVESH 2.0 Web Portal: Fully operationalized digital portal that manages the end-to-end green clearance workflow.
GIS Spatial Overlay Automation: Integrates Geographic Information Systems (GIS) and a Decision Support System (DSS) to automatically cross-reference proposed project coordinates against digitized maps of Reserved Forests, National Parks, Wildlife Sanctuaries, Eco-Sensitive Zones, and Coastal Regulation Zones during the screening phase.

6. Recent Legislative Reforms & Judicial Directives (2024–2026)

Reversal of Linear Project Earth Excavation Exemption (2025): MoEFCC withdrew the 2020 blanket exemption for "ordinary earth" excavation used in road construction, pipelines, and transmission lines following the Supreme Court's ruling in Noble Paikada v. Union of India (2024), restoring screening requirements to prevent unregulated hill cutting and topsoil erosion.
Expansion of Category B2 Exemptions (January 2025): Industrial sheds, educational buildings, and student hostels with a built-up area up to 1,50,000 square meters were classified under Category B2, exempting them from formal EIA reports and public hearings to promote educational and industrial infrastructure.
Strategic Mineral Screening Exemptions (September 2025): Mining projects involving Atomic, Critical, and Strategic minerals (e.g., Rare Earth Elements, Lithium, Cobalt, Monazite) were exempted from public consultations under Category B1/A screening rules to strengthen national mineral security.
Draft EIA 2026 Fallback Authority (SCEIA): To resolve clearance bottlenecks caused by lapsed state-level committees, the draft notification provides that if an SEAC fails to complete a scoping appraisal within 120 days, the proposal moves automatically to a Standing Committee on Environment Impact Appraisal (SCEIA) via PARIVESH 2.0.
Absolute Bar on Ex-Post Facto Screening (Vanashakti v. Union of India, 2025): The Supreme Court restrained the Centre from granting ex-post facto or retrospective environmental clearances, reaffirming that screening and scoping must occur prior to ground construction, and that commencing operations without prior clearance is a gross illegality.

Comprehensive Summary Matrix: Screening and Scoping

Parameter / Dimension	Screening Stage	Scoping Stage
Core Objective	Determine whether an EIA is required and classify project into Category A, B1, or B2.	Define study boundaries, baseline parameters, and formulate ToR.
Governing Statute	EIA Notification, 2006 under Environment (Protection) Act, 1986.	EIA Notification, 2006.
Category A Handler	MoEFCC / EAC (Automatic full EIA required).	EAC formulates Central ToR.
Category B Handler	SEIAA / SEAC (Classifies into B1 or B2).	SEAC formulates State ToR for Category B1.
B2 Category Status	Exempt from further scoping, EIA report, and public hearing.	Not applicable (Category B2 bypasses scoping).
Digital Platform	PARIVESH 2.0 GIS-based spatial screening.	PARIVESH 2.0 auto-ToR generation mechanism.
ToR Validity	N/A	3 Years (extendable to 4–5 years for mega projects).

Quick Revision

Screening Definition: First stage of EIA; decides if a project needs EIA and categorizes it into Category A, B1, or B2.
Scoping Definition: Second stage of EIA; decides what impacts to study and formulates the binding Terms of Reference (ToR).
Category A: Appraised at Central level by MoEFCC & EAC; full EIA and Public Hearing mandatory.
Category B1: Appraised at State level by SEIAA & SEAC; full EIA and Public Hearing mandatory.
Category B2: Appraised at State level; exempt from formal EIA report and Public Hearing.
General Conditions (GC): Category B projects within 5–10 km of ESZs, National Parks, or borders upgrade automatically to Category A.
Baseline Data Term: Scoping mandates field sampling over at least 1 non-monsoon season.
ToR Validity: Valid for 3 years for collecting data and submitting the draft EIA report.
2025/2026 Reforms: PARIVESH 2.0 auto-ToRs, SCEIA 120-day fallback body, and SC ban on retrospective screening (Vanashakti 2025).

Memory Map

Stage 1: Screening (Categorization) ──► EIA 2006 ──► Cat A (Central EAC) vs. Cat B (State SEAC) ──► Cat B split into B1 (Full EIA) or B2 (Exempt).
Stage 2: Scoping (ToR Formulation) ──► Applies to Cat A & B1 ──► Form 1/1A Scrutiny ──► Formulates Terms of Reference (ToR) ──► 1 Non-Monsoon Season Baseline.
Digital & Judicial Controls ──► PARIVESH 2.0 Auto-ToR ──► SCEIA 120-Day Fallback (Draft EIA 2026) ──► Bar on Ex-Post Facto Clearances (Vanashakti 2025).

Must Remember

Category B2 Exemption: Category B2 projects are exempt from both formal EIA report preparation and Public Hearings.
Location Trigger (General Conditions): Category B projects located within 5–10 km of an ESZ or Protected Area escalate to Category A.
Baseline Duration: Baseline environmental data must be collected over a minimum of one non-monsoon season.
ToR Validity: Terms of Reference issued during scoping remain valid for 3 years.
Auto-ToR System: Standardized ToRs are auto-generated on PARIVESH 2.0 if EAC/SEAC does not customize them within 30 days.

Key Terms

Screening: The process of deciding whether a project requires an EIA and determining its category.
Scoping: The process of defining the study boundaries, parameters, and formulating the ToR for an EIA study.
Terms of Reference (ToR): A binding document defining the exact scope of environmental studies required for preparing the EIA report.
Category B2: Developmental projects with minor local impacts that are appraised directly without full EIA studies or public hearings.
PARIVESH 2.0: Centralized web portal for single-window green clearances and automated GIS spatial screening.

1-Line Bits / Short Points

Screening determines whether a project requires an EIA study and classifies it into Category A, B1, or B2.
Scoping formulates the Terms of Reference (ToR) and defines the spatial/temporal boundaries for the EIA study.
Category A projects are appraised at the Central level by MoEFCC and the Expert Appraisal Committee (EAC).
Category B projects are appraised at the State level by SEIAA and the State Expert Appraisal Committee (SEAC).
Category B2 projects are exempt from both formal EIA report preparation and Public Hearings.
General Conditions automatically upgrade a Category B project to Category A if it lies within 5–10 km of a Protected Area or ESZ.
Scoping mandates baseline data collection across a minimum study radius of 10 km over one non-monsoon season.
Terms of Reference (ToR) issued by EAC/SEAC are valid for 3 years.
The PARIVESH 2.0 portal enables GIS-based spatial screening and auto-generation of standard ToRs.
Under the draft EIA 2026 rules, if SEAC delays scoping beyond 120 days, the proposal moves automatically to SCEIA.
In Vanashakti v. Union of India (2025), the Supreme Court ruled that retrospective or ex-post facto screening and scoping is completely illegal.

13.2: Screening and Scoping Process