Bengaluru - KA
Today's briefing
Pre-monsoonPre-monsoon drawdown: Cauvery upstream at 31% of FRL, awaiting south-west monsoon onset.
- -Krishnaraja Sagar (KRS) is the most-drawn at 23% FRL; Hemavathi (Gorur Dam) carries the most buffer at 40% FRL.
- -BWSSB's Cauvery Stage V (commissioned 16 Oct 2024) is delivering only ~400 of 775 MLD design as of Feb 2026 (The Ken). Fully delivered, post-Stage-V supply covers the 2034 demand (~2,608 MLD) but still falls ~721 MLD short by 2049.
- -~14M residents fall within BWSSB's piped jurisdiction, but actual coverage is only ~71% (ISEC, 2017-18); the rest depend on over-extracted borewells and the ~5,000-tanker informal market. IISc Groundwater Outlook (Apr 2025) flags 65 BBMP wards as critically over-extracted.
- -Monsoon onset for the Cauvery catchment is typically the first week of June (south-west monsoon). KRS + Hemavathi typically refill 60-80% by end-July in a normal year; weak monsoons (2017, 2023) push that into August.
Cauvery upstream storage: live ingest pending
Reservoir Status
Krishnaraja Sagar (KRS)
23.2%11,472mcft
of 48,400 mcft capacity
In: 684Out: 438
Hemavathi (Gorur Dam)
40.0%14,839mcft
of 35,700 mcft capacity
In: 559Out: 300
Kabini (Beechanahalli)
27.0%5,275mcft
of 19,520 mcft capacity
In: 591Out: 0
Harangi
36.6%3,108mcft
of 8,500 mcft capacity
In: 273Out: 180
Groundwater
CGWB block exploitation, ward depth (interpolated), live WRIS station overlay.
Water bodies
OSM polygons, flagship tanks, restoration priority badges, lost-tank inventory.
Tanker market
What households actually pay - longitudinal OpenCity surveys (2015 / 2019 / 2024).
About this dashboard
Methodology, data sources, water sources tracked, and the data gaps we're honest about.
Methodology: Reservoir levels for Bengaluru from BWSSB. Daily consumption assumptions (~1450 MLD demand) are starting points; the sliders above let you substitute your own. See theAbout pagefor the full data-source index and methodology.