BMC gets Maharashtra nod for 8-km underground water tunnel in Bhiwandi
Synopsis
Maharashtra has cleared a major underground water tunnel for the BMC, replacing four ageing surface pipelines — some over four decades old — that carry water across 8 km between Pise and Panjrapur in Bhiwandi. The project comes with strict conditions: zero state funding, mandatory environmental clearances, and a geological study before any TBM is selected.
Key Takeaways
The Maharashtra government approved the BMC's 8-km underground water tunnel between Pise and Panjrapur in Bhiwandi on 21 September 2026 .
The tunnel will replace four surface pipelines (three of 2,235 mm diameter; one of 3,000 mm ) commissioned between 1979 and 2007 .
The oldest pipeline has been in service for 47 years ; all four are nearing the end of their operational lifespan.
The state imposed a zero financial liability condition — the BMC bears all costs for funding, execution, and maintenance.
A complete geological study must precede selection of the Tunnel Boring Machine (TBM) ; noise levels must be kept below 55 decibels .
Environmental clearances from MoEF&CC and other bodies may be required before construction begins.
The Maharashtra government on Monday, 21 September 2026, granted formal approval to the Brihanmumbai Municipal Corporation (BMC) to design and construct an 8-kilometre underground water tunnel linking Pise and Panjrapur in Bhiwandi, a critical step toward securing the Mumbai Metropolitan Region's (MMR) long-term water supply infrastructure.
Why the Tunnel Is Needed
The same 8-km stretch is currently served by four surface pipelines — three measuring 2,235 mm in diameter and one measuring 3,000 mm — commissioned between 1979 and 2007. Having operated for 47, 40, 30, and 19 years respectively across Stages 1, 2, 3, and 3A, the pipelines are nearing the end of their operational lifespan.
The transition to an underground tunnel addresses mounting challenges: space constraints along the existing pipeline corridor in Bhiwandi, structural deterioration of ageing infrastructure, vulnerability to surface disruptions, escalating water demand across the MMR, and the need to integrate with newly planned pumping stations and ongoing network-strengthening projects.
How the Approval Came About
The BMC's Additional Municipal Commissioner formally moved the proposal by letter dated 23 March 2026, seeking state clearance to commence pre-construction and engineering preparations. The Maharashtra government's approval, extended on Monday, clears the path for detailed project design and construction planning.
Conditions the State Has Imposed
The state has made clear that the project carries zero financial liability for the government — the BMC alone is responsible for funding, execution, and long-term maintenance. Key conditions include ensuring no damage to buildings or structures along the tunnel route, verifying whether clearances from the Ministry of Environment or the Groundwater Survey and Development Agency are required, and obtaining permissions from the Ministry of Environment, Forest and Climate Change (MoEF&CC) and other relevant authorities.
Authorities also directed that the Tunnel Boring Machine (TBM) be selected only after a thorough geological study of the underground strata. The state stressed that 'necessary measures must be taken to ensure that no disaster-like situation arises during the ongoing work or after completion of the water tunnel due to heavy rainfall in Mumbai and adjacent areas during the monsoon period.'
Environmental and Safety Safeguards
The BMC must safely dispose of solid waste generated during excavation and implement measures to prevent dust pollution. Noise-control requirements are strict: the civic body must deploy silencers, sound barriers, rubber mats for muck-handling trucks, and hydraulically operated crane hoisting systems to keep noise levels below 55 decibels.
The BMC will bear full responsibility for preservation, maintenance, repairs, and all legal, judicial, or administrative issues arising from excavation or construction. With approvals now in motion and geological studies required before TBM selection, the project's timeline will hinge on how swiftly the BMC clears environmental and regulatory hurdles.
Point of View
Well beyond any reasonable design life. What stands out is the state's arms-length posture: zero financial liability for itself, full burden on the BMC. That is fiscally prudent but politically convenient, shifting accountability for cost overruns, environmental clearances, and construction risk entirely onto the civic body. The mandatory geological study before TBM selection is sensible, but it also means the project's actual timeline remains opaque. Given Mumbai's monsoon vulnerability and Bhiwandi's dense corridor, execution risk is real — and the conditions the state has attached will only matter if someone is actually checking compliance.
NationPress
21 Sept 2026
Frequently Asked Questions
What is the BMC underground water tunnel project approved by Maharashtra?
It is an 8-km underground water tunnel connecting Pise and Panjrapur in Bhiwandi , approved by the Maharashtra government on 21 September 2026 . The tunnel will replace four ageing surface pipelines that have served the Mumbai Metropolitan Region for up to 47 years.
Why are the existing pipelines being replaced?
The four surface pipelines, commissioned between 1979 and 2007 , are nearing the end of their operational lifespan. Additional reasons include space constraints along the Bhiwandi corridor, pipeline deterioration, vulnerability to surface disruptions, rising water demand in the MMR, and the need to integrate with new pumping stations.
Who will fund and maintain the underground water tunnel?
The BMC bears sole responsibility for funding, execution, and long-term maintenance. The Maharashtra government's approval explicitly carries zero financial liability for the state.
What clearances are required before construction can begin?
The BMC must verify whether approvals from the Ministry of Environment or the Groundwater Survey and Development Agency are needed, and must obtain permissions from MoEF&CC and other relevant authorities. A full geological study of the underground strata is also required before the Tunnel Boring Machine can be selected.
What environmental and safety conditions has the state attached to the project?
The state has directed that noise levels be kept below 55 decibels using silencers, sound barriers, rubber mats, and hydraulic crane systems. Solid excavation waste must be properly disposed of, dust pollution must be prevented, and measures to guard against monsoon-related disasters during and after construction are mandatory.
