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Reading of 13 Nov 2026
Red Hills (Puzhal) is the fullest, at 72% of its capacity.
Room for 912 mcft more before it is full.
In 45 - out 205 cusecs
In 60 - out 40 cusecs
In 0 - out 15 cusecs
In 0 - out 198 cusecs
In 15 - out 30 cusecs
In 30 - out 8 cusecs
All 6 together: 43% full, room for 7,540 mcft.
Storage and full capacity as published by CMWSSB. Room left is full capacity minus storage. cmwssb.tn.gov.in/lake-level
A reservoir near full is not a flood forecast. Surplus releases are decided by Tamil Nadu's Water Resources Department.
Reservoir storage is under half capacity. Reservoirs hold 43% of capacity. 14 of 196 groundwater wards show stressed or critical levels. 66 wards are declining year-over-year. 246 water bodies near degraded rivers are flagged for priority restoration.
Reservoirs: 2026-11-13 | Groundwater: Mar 2024
3 of 4 supply reservoir catchments are below normal over 30 days. Chembarambakkam catchment is 32% below its 30-day norm.
Catchment rainfall through 30 Sept 2026 (30-day window). Catchment boundaries are provisional, pending verification.
Treated-water reuse + micro-irrigation can cut unmet demand 52-93% by 2050.
Risk index & scores: TNGCC and CEEW 2026, "Towards Climate-resilient River Systems in Chennai" (CC BY-NC 4.0).
CGWB block exploitation, ward depth (interpolated), ward risk composite, live WRIS station overlay.
mapped water bodies, encroachment census, restoration priority badges, ward search, lost-tank inventory.
Methodology, data sources, water sources tracked, and the data gaps we're honest about.
Methodology: Reservoir levels for Chennai from CMWSSB. Daily consumption assumptions (~830 MLD demand) are starting points; the sliders above let you substitute your own. See theAbout pagefor the full data-source index and methodology.