Bengaluru · KA
Today's briefing
Pre-monsoonPre-monsoon drawdown: Cauvery upstream at 30% 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 39% FRL.
- -BWSSB's Cauvery Stage V (commissioned Oct 2024) is delivering ~400 MLD against 775 MLD design per The Ken (Feb 2026), keeping the city's piped capacity below 2034 demand even at full upstream storage.
- -~5.8M of 14M GBA residents are on BWSSB piped supply; 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)
23.1%11,398mcft
of 48,400 mcft capacity
In: 634Out: 436
Hemavathi (Gorur Dam)
39.5%14,653mcft
of 35,700 mcft capacity
In: 44Out: 300
Kabini (Beechanahalli)
23.2%4,527mcft
of 19,520 mcft capacity
In: 112Out: 600
Harangi
35.0%2,972mcft
of 8,500 mcft capacity
In: 203Out: 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.