Days of Water Left
Updated 14 May 2026353 days+
days remaining
Worst case (no rain):353 days
Current trend:Won’t run out(inflow 1.4x of demand)
If seasonal rains:Won’t run out(inflow 2.6x of demand)
Reservoir storage: 7,992 / 13,222 mcft60.4%
Chennai's water at a glance
Chennai maintains year-long water security despite complete halt in reservoir inflows this week.
- -Reservoir storage holds steady at 64% capacity, providing one full year of water supply under both moderate and worst-case consumption scenarios.
- -Inflows to city reservoirs have completely stopped this week, marking a 100% drop from previous week levels as summer intensifies.
- -Ward-level risks remain manageable with 185 areas at moderate stress and only 15 wards experiencing high water stress - no critical zones reported.
Reservoirs: 2026-05-14 | Groundwater: 2024-03 | Risk scores: 2026-05-03
Catchment Rainfall Context
3 of 4 supply reservoir catchments are above normal over 30 days. Chembarambakkam catchment is 50% above its 30-day norm.
Chembarambakkam
Above+50%
Red Hills (Puzhal)
Above+28%
Poondi
Near normal-6%
Cholavaram
Above+23%
Catchment rainfall through 31 Mar 2026 (30-day window).
Reservoir Status
Chembarambakkam
81.3%2,963mcft
of 3,645 mcft capacity
In: 220Out: 202
Red Hills (Puzhal)
62.5%2,062mcft
of 3,300 mcft capacity
In: 140Out: 209
Poondi
49.5%1,599mcft
of 3,231 mcft capacity
In: 0Out: 307
Veeranam
53.7%787mcft
of 1,465 mcft capacity
In: 0Out: 73
Kannankottai
75.8%379mcft
of 500 mcft capacity
In: 0Out: 17
Cholavaram
18.7%202mcft
of 1,081 mcft capacity
In: 0Out: 148
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Explore mapData may be outdated.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