Devyami
The Mumbai skyline across the bay from Marine Drive

Smart water solutions in Mumbai

Tank automation, pumps, water heating, treatment and pools — designed around Mumbai's water, installed and serviced locally, and watched from your phone.

  • Designing water systems since 1996
  • Free site visit
  • Works without internet
Photo: Livelikerw · CC BY-SA 3.0

Mumbai's water

Seven distant lakes, one short supply window

Mumbai's water arrives from lakes outside the city on a BMC timetable, often for an hour or two per zone. We make sure that window fills every tank, holds pressure to the top floor and keeps basements dry.

Mumbai draws around 3,850–3,950 million litres a day from seven rain-fed lakes, including Tansa, Modak Sagar, Vehar and Tulsi, treats most of it at the Bhandup complex and releases it zone by zone on a published timetable. In Colaba or Fort that can mean a supply slot of roughly an hour or two; in a redeveloped Worli tower it means a booster system that has to work every time. Devyami's level controllers, hydro-pneumatic pumps and LoRa sensors help societies from Bandra to Mulund catch every supply window, hold steady pressure and see their tanks on a phone.

Main source
Seven rain-fed lakes
Tansa, Vaitarna, Bhatsa and others
Daily supply
About 3,850–3,950 MLD
Demand estimated above 4,200 MLD
Groundwater
Saline in coastal pockets
About 35% of area highly vulnerable
Wettest day
944 mm, one day
Santacruz, 26 July 2005

How water reaches you in Mumbai

  1. Step 1

    Monsoon lakes

    Seven lakes, from Tansa and Modak Sagar in Thane district to Vehar and Tulsi inside the city, fill between June and September, and BMC aims for about 14.47 lakh million litres in storage by 1 October to last the year.

  2. Step 2

    Bhandup treatment

    Most of the raw water is treated at the Bhandup complex, a 2,810 MLD facility BMC describes as Asia's largest, before trunk mains carry it into the city.

  3. Step 3

    Zone timetables

    Service reservoirs release water zone by zone at fixed times that BMC publishes ward by ward, in many zones for only an hour or two.

  4. Step 4

    Sump to terrace

    Your building's underground sump catches that slot, and transfer or booster pumps lift it to terrace tanks or straight to the floors for the rest of the day.

  5. Where we take over

    Your tank, automated

    Sensors read every tank, an APCON controller runs and protects the pump, and the app shows it all on your phone.

    How automation works →

Mumbai's water, honestly

What Mumbai throws at your water system, and the fix for each

Short slots and precautionary cuts

BMC releases water zone by zone on a published timetable, and in many zones the slot lasts about an hour or two. When lake stock fell to about 23 percent in May 2026, a 10 percent cut began on 15 May, and BMC kept it in place even after the lakes crossed 90 percent in August.

How we fix it

A multi-tank level controller starts the transfer pump as soon as the sump has water, fills each wing's terrace tank in turn and stops before the sump runs dry, so a short slot is never wasted.

Pressure in towers and redevelopments

Redeveloped buildings add floors and families faster than the water connection grows. In June 2026, residents of the Worli BDD rehabilitation towers reported low pressure across buildings and leaking underground tanks, with tankers filling the gap.

How we fix it

A hydro-pneumatic booster set run by our multi-pump controller uses VFD and PID control to hold the set pressure on every floor and shares duty across pumps so none is overworked.

Monsoon water in basements

On 26 July 2005 the Santacruz observatory recorded 944 mm of rain in a day, the city's wettest on record. Basements, lift pits and podium parking sit below street level, so they take water first when drains are overwhelmed.

How we fix it

Dewatering pumps on a Devyami motor driver start on a float or level sensor, run only while there is water to clear and are protected against dry running, overload and single phasing.

Salty borewells near the coast

CGWB's 2025 aquifer management plan for Mumbai rates about 35 percent of the city as highly vulnerable to seawater intrusion. Conductivity above 10,000 µS/cm was found in parts of Fort, Shivaji Park, Mahim and Mulund East.

How we fix it

Test the borewell first; where TDS is high, an RO plant sized to the actual water, with our RO controller watching pressure and product quality, makes it usable for kitchens and cooling.

Many tanks, one manager

A large society may juggle a sump, several terrace tanks, STP water for flushing and the odd tanker. When a tanker drivers' strike cut deliveries in June 2026, Worli BDD residents who relied on tankers for flushing water were among the first hit.

How we fix it

Wireless LoRa level sensors on every tank and the Devyami app show levels, pump status and dry-run trips live, and alert the manager in time to book a tanker or shift loads.

Something else?

Tell us what your water is doing

Describe it in your own words. An engineer who knows Mumbai's conditions will call you back.

Start with a free site visit

Through the year

Mumbai's water, season by season

Summer

By May the lakes are at their lowest; in 2026 stock fell to about 23 percent, enough for roughly 83 days, and BMC cut supply by 10 percent from 15 May.

Dry-run protection and usage alerts →

Monsoon

June to September refills the lakes, but intense bursts like the 944 mm day of July 2005 test every basement sump and drain.

Dewatering pumps and UV treatment →

Winter

Mumbai's short, mild winter puts little load on water heating, which is why efficient air-source heat pumps suit the hotels, hostels and hospitals that need hot water all year.

Heat pumps and solar hot water →

Watch it run

Watch a building in Mumbai run its own water

This is the same diagram our customers see in the app. The sump and the overhead tank are both sensed, and one APCON controller decides when the pump runs.

  • The pump starts when the overhead tank is low, but only if the sump has water to give
  • It stops at your full level, so the tank never overflows
  • Dry run, overload and voltage faults trip it before the motor is damaged
  • Your phone shows each level, each pump run and each alert as it happens
74%74%7,400 L7,400 L3 m3 m2 m2 mUnderground TankHydrostatic probePump56%2,800 L56%2,800 LOverhead Tank2.5 mUltrasonicPUMP ON229 VAPCON Controller

Engineered by us since 1996

The controllers behind Mumbai's pump rooms

All controllers →
70%70%92%92%34%34%64%64%Filled in order · full tanks skipped

Multi Tank Level Controller

Several tanks, one pump set — filled in order, never from an empty source.

View product →
Multi Pump Controller

Multi Pump Controller

Up to six pumps — drives and direct-on-line — running as one system.

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Motor Driver

Motor Driver

Starter, controller and motor protection for one pump — single or three phase.

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66%66%RO membraneRejectTDS 42 ppmHP 12.0 bar

RO Controller

Your RO plant's water quality, pressures and pump trips — live in the app.

View product →

Who we build for

Every kind of Mumbai building

  • Redevelopment towers
  • Housing societies with sump and terrace tanks
  • MHADA and rehabilitation buildings
  • Commercial towers
  • Hotels and hospitals
  • Podium-parking complexes

Our Workflow

Four steps from first call to lifelong service. Swipe or tap a step.

Free Site Visit
Step 1

Free Site Visit

Our engineers evaluate your requirements and give you accurate consultation for free.

📍 Request Site Visit
Get Quotation
Step 2

Get Quotation

From your requirements we will provide you with a quotation with multiple options.

Installation
Step 3

Installation

Our expert engineers will install, inspect & commission the systems at your site.

After Sales Services
Step 4

After Sales Services

Be it repairs or maintenance we stand by you as you need more services after sales.

🛠 Register Complaint

Across the city

Serving all of Mumbai

Old neighbourhoods and new growth corridors alike, from single homes to whole townships.

  • Colaba
  • Fort
  • Worli
  • Dadar
  • Mahim
  • Bandra
  • Andheri
  • Goregaon
  • Malad
  • Borivali
  • Powai
  • Ghatkopar
  • Chembur
  • Mulund

And around Mumbai

  • Thane
  • Navi Mumbai
  • Mira-Bhayandar
  • Bhiwandi
  • Kalyan-Dombivli
  • Vasai-Virar

Installers and plumbers

Work on water systems in Mumbai?

Become a Devyami dealer. You get our controllers, engineering support and the leads from this page.

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Questions from Mumbai

What people here ask us

Our society gets BMC water for barely an hour. How do we make sure every wing's tank fills?

Fit a multi-tank level controller on the transfer pump. It senses water in the sump, fills each terrace tank in a set order and stops before the sump runs dry, with no one needed at the switch. Add LoRa sensors and the Devyami app if you want to see each tank's level from the society office.

Upper floors in our redeveloped building get weak pressure. What should we install?

A hydro-pneumatic booster system managed by our multi-pump controller is usually the right fit. VFD and PID control hold a steady set pressure whether two taps or two hundred are open, and duty is shared across pumps. We survey the riser, tanks and floor count before sizing it.

Can we use borewell water in Mumbai for drinking?

Not without a lab test. Many coastal pockets show seawater influence, so dissolved salts can be far above drinking limits. If the report shows high TDS, an RO plant with our RO controller is the practical route for drinking and kitchen use, while filtered water can still serve flushing and gardens.

Do you install and service Devyami systems in Mumbai?

Yes. Tell us about your building, society or factory and our engineers design the system around Mumbai's water. A Devyami dealer or installer then installs, commissions and services it locally, and every connected controller can be checked remotely through our platform. The first site consultation is free.

Will the automation keep working without internet or after a power cut?

Yes. Level switching, pressure control, schedules and every motor protection run inside the controller on your wall, not in the cloud. The internet only carries the live view and alerts to your phone. The controller keeps its own real-time clock and remembers its delays through a power cut.

Can you automate my existing pumps and tanks without new wiring?

Usually, yes. The APCON Motor Driver takes the old starter panel’s place on the wall, on the pump and tanks you already have. Wireless level sensors reach terrace and underground tanks where running a cable would mean breaking walls. A single-pump retrofit is usually done in a few hours.

More answers in our FAQ and guides.

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Talk to us about Mumbai

Describe your home, society, hotel or factory. We'll design around Mumbai's water and connect you with a Devyami dealer who installs and services locally.

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Sources for the Mumbai facts on this page
  • Lakes at 23.52% on 11 May 2026, 83 days of stock, 10% cut from 15 May incl. Thane and Bhiwandi — freepressjournal.in
  • Stock at 92% on 15 Aug 2026, 14.47 lakh ML needed by 1 Oct, cut retained, Tansa/Modak Sagar (Thane) and Vehar/Tulsi overflowing — freepressjournal.in
  • Supply about 3,950 MLD against 4,200 MLD demand; supply history 3,850 MLD after 2018 — orfonline.org
  • Bhandup complex 2,810 MLD, described as Asia's largest; new 2,000 MLD plant by April 2029 — freepressjournal.in
  • CGWB 2025 aquifer plan: ~35% area highly vulnerable to seawater intrusion; EC above 10,000 µS/cm at Fort, Shivaji Park, Mulund East, Mahim — dynamitenews.com
  • Worli BDD redevelopment: low pressure, leaking underground tanks, tanker strike, tankers for flushing until STP starts (June 2026) — freepressjournal.in
  • BMC zone-wise supply timings (e.g. Colaba, Fort windows of roughly 1–2 hours) — crmapp.mcgm.gov.in
  • 944 mm at Santacruz on 26 July 2005, wettest day on record — en.wikipedia.org
  • Hero photo: Livelikerw, CC BY-SA 3.0 , via Wikimedia Commons