Dharavi Redevelopment Project – Step towards Mumbai’s Environmental Sustainability?

The Dharavi Redevelopment Project (DRP) is one of the most ambitious urban renewal programs globally, aiming to transform over 600 acres of informal settlements in the heart of Mumbai. While it is often framed as a real estate and social project, its success or failure will be a defining moment for Mumbai’s environmental sustainability. By moving from a “high-density, low-sanitation” model to a “smart-city” framework, the project seeks to address long-standing ecological challenges—though it also faces significant environmental criticism.

Core Environmental Goals

The master plan for Dharavi emphasises “smart city and sustainable development” with several environment-related components

• Green spaces & urban forestry: Wide public spaces, streets, and open areas will be planted with local flora to provide shade, reduce heat, and support birds and other local fauna.
• Climate resilience: The plan aims to strengthen both natural systems (like nalas) and built infrastructure (drainage, roads) to reduce vulnerability to climate change, flooding, and sea-level rise.
• Technology for efficiency: Use of technology is proposed to improve access to and efficiency of water, energy, and other resources, aiming for lower per capita ecological footprint.

Infrastructure for Environmental Sustainability

The project is designed not just as housing, but as a complete urban ecosystem with modern services to reduce environmental harm:

• Wastewater and sanitation: A new, integrated sewerage and stormwater drainage network is planned to replace the current ad-hoc systems, which are a major source of pollution to the Mithi river and coastal waters.
• Solid waste management: The plan includes dedicated facilities for solid waste management and treatment, aiming to drastically cut the volume of untreated waste that currently flows into the city’s water bodies.
• Reduced pollution into Mithi river: Officials argue that once informal settlements are replaced with proper housing and sewage, the contribution of Dharavi to Mithi river pollution can be brought under control, helping the river recover.

Key Pillars of Sustainability in the Proposed Plan

The official masterplan integrates several modern urban design principles aimed at making Dharavi a resilient urban core.

• Integrated Waste Management: Dharavi currently processes nearly 80% of Mumbai’s dry waste through an informal circular economy. The redevelopment aims to formalize this, replacing hazardous, unregulated workshops with modern recycling infrastructure that reduces air and soil pollution.
• Climate-Resilient Design: The plan includes “diagonal street patterns” to allow prevailing winds to permeate the urban fabric, mitigating the Urban Heat Island (UHI) effect.
• Transit-Oriented Development (TOD): By designing high-density clusters around mass transit stations, the project encourages walking and non-motorized transport (NMT), aiming to reduce the city’s carbon footprint.
• Expansion of Green Cover: The proposal promises over 100 acres of open spaces, including parks and local flora, to create a habitat for local fauna and improve air quality.

 Environmental Challenges & Concerns

The certain provisions of the Master Plan for redevelopment project raise alarms regarding the broader ecological impact on Mumbai:

A. The “Salt Pan” Risk

The project involves rehabilitating “non-eligible” residents on salt pan lands in Mumbai’s eastern suburbs (like Wadala and Kanjurmarg).

• Flood Risk: Salt pans act as natural “holding ponds” during monsoons. Converting them into concrete townships could severely disrupt Mumbai’s natural drainage, potentially leading to catastrophic flooding in the eastern suburbs.
• Loss of Wetlands: These areas are crucial stopovers for migratory birds and home to local wildlife like jackals and serve as a potent wet-land. These wetlands maintain the richness of the local biodiversity and there is every possibility of losing this wetland once the project is implemented.

B. Mithi River Impact

Dharavi sits along the Mithi River, a critical waterway for Mumbai. Large-scale construction increases the risk of:

• Runoff & Pollution: Construction debris and increased wastewater volume from high-rise living could further choke the river if not managed by high-capacity treatment plants.
• Mangrove Degradation: Encroachment near the Mahim Creek (the river’s mouth) remains a legal and environmental flashpoint.

Comparing Current vs. Future Ecology

The “Sustainability Paradox”

Dharavi is arguably one of the most sustainable places on earth today in terms of resource recovery and low carbon footprint per capita (due to minimal electricity use and a massive circular economy).

The risk of redevelopment is that by “modernizing,” the project might increase the total energy consumption and waste production of the area. A truly sustainable redevelopment must ensure that the informal wisdom of recycling is not lost under the weight of new luxury towers.

Overall Assessment

From an environmental sustainability perspective, the Dharavi Redevelopment Project can be seen as a double-edged step:

• Positive aspects: It replaces an extremely dense, unplanned settlement with a planned township that has proper sewage, drainage, green cover, and climate-resilient infrastructure, which should reduce local pollution and improve public health.
• Negative aspects: By opening up salt pan and other low-lying areas for large-scale construction, the project risks undermining Mumbai’s natural flood-absorbing capacity and disturbing coastal ecosystems, contradicting long-term sustainability and climate adapt

Thus, to ensure environmental sustainability of Central Mumbai with the implementation of this redevelopment project, the negative aspects of the project as mentioned above, have to be minimised.