Eco-sensitive zones

1. Meaning and ecological significance

An eco-sensitive zone, or ESZ, is a notified area in the vicinity of a protected ecosystem where certain activities are prohibited, regulated or encouraged according to their environmental implications. Around national parks and wildlife sanctuaries, ESZs act as shock absorbers against pressures originating outside protected boundaries. Their purpose is to create a transition between areas receiving relatively strict protection and surrounding landscapes used for settlement, farming, infrastructure and industry.

Ecological processes do not stop at administrative boundaries. Wildlife may move outside a sanctuary to feed, breed or disperse; rivers carry sediment and pollutants across boundaries; and roads can interrupt movement between habitats. Regulating surrounding land use therefore helps maintain habitat connectivity, water security, landscape integrity and the ecological effectiveness of protected areas.

ESZs are especially important where protected areas adjoin rapidly urbanising regions, mining belts, plantations or tourist destinations. However, they are not necessarily uninhabited wilderness. Villages, agricultural fields and existing livelihood activities may lie within them. The conservation objective is compatible land use rather than automatic displacement or the elimination of all economic activity.

• Ecological functions include buffering edge effects, reducing pollution, protecting catchments and maintaining wildlife movement routes.
• An ESZ can assist corridor conservation, but it is not automatically identical to a wildlife corridor.
• Notification does not by itself convert all included land into forest land or transfer private ownership to the government.

2. Legal basis and notification process

The principal legal foundation is Section 3 of the Environment (Protection) Act, 1986. Section 3(2)(v) empowers the Central Government to restrict areas in which industries, operations or processes may operate, or to prescribe safeguards. Rule 5 of the Environment (Protection) Rules, 1986 provides the associated framework for restrictions based on environmental considerations. The Ministry of Environment, Forest and Climate Change issues ESZ notifications using these powers.

The Ministry’s guidelines of 9 February 2011 provide the policy framework for ESZs around national parks and wildlife sanctuaries. State governments and Union Territory administrations generally prepare site-specific proposals containing boundaries, maps, ecological features, settlements and proposed activity controls. A draft notification invites objections and suggestions before the final notification is issued. Public participation is important because boundary selection and restrictions affect local livelihoods and development choices.

Final notifications normally specify geographical coordinates, village coverage, an activity schedule, a monitoring committee and preparation of a Zonal Master Plan. Such plans should integrate ecological protection with local development and relevant sectoral plans. The committee monitors compliance, but its presence does not replace other statutory authorities. Forest diversion, wildlife-related approvals and environmental clearance requirements continue to apply wherever independently required.

An ESZ should not be confused with a conservation reserve or community reserve, which are protected-area categories under the Wild Life (Protection) Act, 1972. It is also distinct from a biosphere reserve, a Ramsar site or the buffer of a tiger reserve. These designations may overlap geographically but arise from different legal or policy frameworks.

3. Extent and Supreme Court directions

ESZ boundaries are intended to reflect local ecological and geographical conditions. Relevant factors include terrain, drainage, habitat continuity, species movement, existing settlements and development pressures. Their width can vary along different sides of the same protected area. The frequently cited distance of 10 kilometres is not a rule making every surrounding parcel a uniformly restricted ESZ. The 2011 guidelines contemplate site-specific delineation and, where ecologically necessary, inclusion of important areas beyond 10 kilometres.

In T.N. Godavarman Thirumulpad v. Union of India, the Supreme Court on 3 June 2022 directed that protected national parks and wildlife sanctuaries should generally have an ESZ of at least one kilometre from their demarcated boundaries. The order also imposed a restriction on new permanent structures. Its practical consequences generated concerns for settlements, public facilities and livelihood infrastructure around protected areas.

On 26 April 2023, the Court modified these directions. The minimum one-kilometre direction was made inapplicable to protected areas for which the Ministry had issued draft or final ESZ notifications, or for which proposals had been received by the Ministry. The Court also provided exceptions concerning protected areas along interstate boundaries or sharing common boundaries. It removed the blanket restriction on permanent structures in favour of the applicable regulatory framework.

A crucial retained safeguard is the prohibition of mining inside national parks and wildlife sanctuaries and within one kilometre of their boundaries. For examination purposes, distinguish this judicial mining restriction from the separate prohibition of commercial mining ordinarily found in ESZ notifications. Also distinguish an ESZ boundary from any distance-based requirement governing consideration of projects for wildlife clearance.

4. Activity regulation and local livelihoods

The 2011 guidelines broadly organise activities into prohibited, regulated and permissible or promoted categories. Commercial mining, sawmills, polluting industries and hazardous-substance-related activities are typical prohibited activities. The exact legal restrictions must nevertheless be read from the relevant final notification and applicable court orders rather than inferred from a generic list.

Tourism facilities, construction, tree felling, road works, extraction of groundwater and changes in farming systems may be regulated through permissions, location conditions or environmental safeguards. Regulated does not mean either automatically banned or automatically approved. Hotels and resorts, for example, are often subject to specific distance and planning conditions in notifications. Their treatment cannot safely be generalised across every ESZ.

Ongoing agriculture and horticulture, rainwater harvesting, organic farming, renewable-energy practices and restoration of degraded land are generally compatible with ESZ objectives, subject to the notification and other laws. Local residents therefore should not be treated as prohibited occupants merely because their village falls within an ESZ. Conservation policy must recognise livelihood dependence, applicable land and forest rights, and the need for essential services.

• Prohibited: incompatible activities that the notification does not permit.
• Regulated: activities allowed only under specified conditions or approval procedures.
• Promoted or permissible: activities compatible with ecological protection, subject to applicable safeguards.

5. Governance challenges and examination approach

Effective implementation requires more than drawing a buffer on a map. Poor boundary information, delayed Zonal Master Plans, fragmented departmental responsibilities and weak monitoring can undermine protection. Conversely, poorly communicated restrictions can generate uncertainty over house repairs, farming and community infrastructure. Transparent village-level maps and accessible explanations of activity rules are therefore essential.

A balanced approach combines ecological mapping with consultation involving residents, local bodies, forest departments and relevant rights holders. Tourism should reflect carrying capacity and waste-management requirements. Infrastructure planning should minimise fragmentation through alternative alignments and appropriate wildlife passages. Monitoring should examine cumulative pressures across the landscape rather than consider each project in isolation.

For Prelims, use three tests: identify the enabling law, distinguish prohibition from regulation, and reject absolute distance claims. For Mains, frame ESZs as an instrument of landscape-level conservation whose legitimacy depends on scientific delineation, livelihood-sensitive implementation and accountable governance.

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