Days of Water Left
Updated 12 Jun 2026297 days+
days remaining
Worst case (no rain):297 days
Current trend:Won’t run out(inflow 1.9x of demand)
If seasonal rains:Won’t run out(inflow 3.4x of demand)
Reservoir storage: 6,728 / 13,222 mcft50.9%
Chennai's water at a glance
Reservoirs hold adequate supply, but groundwater tells a different story. Reservoirs hold 51% 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: 2026-06-12 | Groundwater: Mar 2024
Catchment Rainfall Context
4 of 4 supply reservoir catchments are below normal over 30 days. Cholavaram catchment is 43% below its 30-day norm.
Chembarambakkam
Below-21%
Red Hills (Puzhal)
Below-39%
Poondi
Below-39%
Cholavaram
Below-43%
Catchment rainfall through 30 Apr 2026 (30-day window).
Reservoir Status
Chembarambakkam
81.1%2,955mcft
of 3,645 mcft capacity
In: 210Out: 213
Red Hills (Puzhal)
52.8%1,741mcft
of 3,300 mcft capacity
In: 0Out: 207
Poondi
34.7%1,120mcft
of 3,231 mcft capacity
In: 290Out: 305
Veeranam
34.5%505mcft
of 1,465 mcft capacity
In: 0Out: 73
Kannankottai
64.4%322mcft
of 500 mcft capacity
In: 0Out: 17
Cholavaram
7.9%85mcft
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Explore mapData may be outdated.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