Days of Water Left
Updated 16 Jun 2026292 days+
days remaining
Worst case (no rain):292 days
Current trend:Won’t run out(inflow 1.8x of demand)
If seasonal rains:Won’t run out(inflow 3.3x of demand)
Reservoir storage: 6,606 / 13,222 mcft50.0%
Chennai's water at a glance
Reservoir storage is under half capacity. Reservoirs hold 50% of capacity. 14 of 194 groundwater wards show stressed or critical levels. 65 wards are declining year-over-year. 246 water bodies near degraded rivers are flagged for priority restoration.
Reservoirs: 2026-06-16 | Groundwater: Mar 2024
Catchment Rainfall Context
3 of 4 supply reservoir catchments are above normal over 30 days. Cholavaram catchment is 26% above its 30-day norm.
Chembarambakkam
Above+24%
Red Hills (Puzhal)
Above+26%
Poondi
Near normal+1%
Cholavaram
Above+26%
Catchment rainfall through 31 May 2026 (30-day window).
Reservoir Status
Chembarambakkam
80.9%2,949mcft
of 3,645 mcft capacity
In: 210Out: 213
Red Hills (Puzhal)
50.9%1,681mcft
of 3,300 mcft capacity
In: 0Out: 208
Poondi
33.9%1,096mcft
of 3,231 mcft capacity
In: 240Out: 305
Veeranam
32.8%481mcft
of 1,465 mcft capacity
In: 0Out: 73
Kannankottai
63.0%315mcft
of 500 mcft capacity
In: 0Out: 17
Cholavaram
7.8%84mcft
of 1,081 mcft capacity
In: 0Out: 8
Groundwater Health
Explore mapData may be outdated. Latest available from OpenCity / CMWSSB is Mar 2024. We're actively looking for newer sources.
5.0m
city average depth to water table
Healthiest: Ward 6 (0.5m)
Most stressed: Ward 32 (16.0m)
Ward distribution (194 wards)
52 healthy88 moderate12 stressed2 critical