BharatNotes What is Coastal Regulation Zone (CRZ)?
The Coastal Regulation Zone (CRZ) is the regulated coastal area where developmental and industrial activities are restricted to protect fragile coastal ecosystems. It was first notified in February 1991 under Section 3 of the Environment (Protection) Act, 1986 by the Ministry of Environment, Forest and Climate Change (MoEFCC). The 1991 notification declared coastal land up to 500 metres from the High Tide Line (HTL), plus a 100-metre strip along tidal creeks, estuaries, lagoons and backwaters, as the regulated zone. It has since been superseded by the CRZ Notification, 2011 and the current CRZ Notification, 2019 (dated 18 January 2019).
The Four CRZ Categories (2019 Notification)
| Category | Description | Key rule |
|---|---|---|
| CRZ-I | Ecologically sensitive areas (mangroves, coral reefs, sand dunes, protected areas — I-A) and the intertidal zone between Low and High Tide Lines (I-B) | Most restricted; clearances handled by MoEFCC |
| CRZ-II | Developed, substantially built-up urban land (built-up plots more than 50%) within municipal limits | Development allowed per existing norms; clearance at State level |
| CRZ-III | Relatively undisturbed rural areas not in CRZ-II — split into III-A (population density above 2,161/sq km) and III-B (below 2,161/sq km, 2011 Census) | NDZ 50 m (III-A) / 200 m (III-B) from HTL |
| CRZ-IV | Water area and sea bed from the Low Tide Line up to 12 nautical miles seaward (IV-A) and tidal water bodies (IV-B) | Clearances handled by MoEFCC |
Key Changes in the 2019 Notification
- Reduced No Development Zone (NDZ): For densely populated rural areas (CRZ-III A), the NDZ was cut from 200 m to 50 m from the HTL, easing construction for local communities.
- Tourism in coastal areas: Temporary tourism facilities — shacks, toilet blocks, change rooms, drinking-water points — are permitted on beaches.
- De-frozen Floor Space Index (FSI): The FSI/Floor Area Ratio, frozen under the 2011 notification, was de-frozen for CRZ-II areas.
- Decentralised clearances: MoEFCC retains clearance powers only for CRZ-I and CRZ-IV; powers for CRZ-II and CRZ-III were delegated to the State level to speed up approvals.
Significance and Implementation
CRZ rules safeguard mangroves, coral reefs, turtle nesting sites, fishing communities' livelihoods and natural buffers against cyclones and tsunamis. Implementation rests on Coastal Zone Management Plans (CZMPs) — maps prepared by coastal States/UTs that demarcate the four CRZ categories and guide permissible activity. Enforcement is through the National and State Coastal Zone Management Authorities. Critics argue the 2019 relaxations favour real estate and tourism over ecological caution amid rising sea levels.
UPSC Angle
For Prelims, memorise the legal basis (EP Act, 1986), the four categories, NDZ distances and the 1991-2011-2019 sequence. For Mains GS3, frame CRZ around the conservation-versus-development trade-off, coastal disaster resilience and decentralised governance. Link it to mangroves, Integrated Coastal Zone Management and Blue Economy themes.
