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California Drinking Water System Area Boundaries
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Last updated2023-03-22
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Water · Los Angeles, California
Filter and exportWater records for Los Angeles
42 official water sources published in Los Angeles, California, from California State Water Resources Control Board, US Geological Survey and US Environmental Protection Agency and 8 more, plus 11 that cover it from above. Each links to the original, with its update rate and whether we've opened it.
42
100%
36%
11
Published in Los Angeles
VerifiedAPI · SocrataFree to reuse
City of LA storm drain system (pipes and inlets)
UpdatesNot stated
Last updated2024-11-29
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Daily State Water Project reservoir elevation and storage
UpdatesMonthly
Last updated2026
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Drinking Water: Public Water System Information (data.ca.gov)
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Last updated2026
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GAMA Groundwater Information System
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Last updatedNot stated
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LA County beach water quality advisories, rain advisories and closures
UpdatesWeekly
Last updated2026
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LADWP water outage map
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Last updatedNot stated
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LADWP Water Supply in Acre Feet (open data)
UpdatesNot stated
Last updated2019-01-29
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SAFER Dashboard: failing and at-risk drinking water systems
UpdatesDaily
Last updated2025
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Statewide lead service line inventory map
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Last updated2026
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Stormwater capture by method and by fiscal year (open data)
UpdatesLive or continuous
Last updated2020-02-11
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USGS gauge 11092450: Los Angeles River at Sepulveda Dam
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Last updated2026-08-25
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USGS Water Data API: Monitoring locations and time-series metadata
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Last updatedNot stated
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Water main breaks / water leaks per month (open data)
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Last updated2018-02-08
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Water Quality Portal (USGS NWIS + EPA WQX/STORET + USDA STEWARDS)
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Last updatedNot stated
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Beach Watch: beach advisories, closures and bacteria monitoring
UpdatesMonthly
Last updated2026
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CIWQS public reports: water quality violations and enforcement
UpdatesDaily
Last updatedNot stated
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Drinking Water Quality Report web summary (dwqr.ladwp.com)
UpdatesYearly
Last updated2025
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Drinking Water Watch (SDWIS public portal)
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Last updatedNot stated
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Drinking Water: Laboratory water quality results (all samples since 1978)
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Last updatedNot stated
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DWR Urban Water Data: drought planning and management
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Last updated2025
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electronic Annual Report (eAR) data
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Last updated2026
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EPA ECHO ICIS-NPDES discharge permits and effluent violations
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Last updatedNot stated
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EPA ECHO Safe Drinking Water Act (SDWA) national dataset
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Last updatedNot stated
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LA County Public Works hydrologic data: stream gauges and well measurements
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Last updatedNot stated
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LA County Public Works near real-time precipitation (ALERT rain gauges)
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Last updatedNot stated
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LA County Waterworks Districts water service line inventory
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Last updatedNot stated
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LA's Drinking Water Quality Report (annual Consumer Confidence Report)
UpdatesYearly
Last updated2025
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LADWP 2025 Urban Water Management Plan and Water Shortage Contingency Plan
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Last updated2026
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LADWP 2026-27 water supply forecast (Eastern Sierra snow survey)
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Last updated2026
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LADWP lead service line inventory statement
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Last updated2024
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LADWP local groundwater basins and contamination plume maps
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Last updated2015
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LADWP newsroom: boil-water notices and water incident updates
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Last updated2025
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LADWP Turf Replacement Rebate and SoCal Water$mart rebates
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Last updatedNot stated
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LADWP water rate schedules (A to F) and tier allotments
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Last updated2016
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Regional Phase I MS4 stormwater permit (Order R4-2021-0105)
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Last updatedNot stated
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Sanitary sewer spill data flat files (statewide SSO database)
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Last updated2026
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Sanitary sewer spill map and interactive spill report
UpdatesDaily
Last updatedNot stated
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State Water Project allocation and Notices to Contractors
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Last updatedNot stated
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Stormwater regulatory information and water quality results (SMARTS)
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Last updated2026
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Urban retail water supplier conservation, supply and demand (monthly)
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Last updated2026
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Water Conservation Ordinance: watering days, phase and fines
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Last updatedNot stated
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Covering Los Angeles from above
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SDWIS drinking water systems and violations (Envirofacts)
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Last updated2026-04-14
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UCMR occurrence data (UCMR 1-5, incl. PFAS and lithium in UCMR 5)
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Last updated2026-10-15
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Service Line Inventory dashboard (lead, galvanized, unknown lines)
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Last updatedNot stated
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Legacy NWIS WaterServices (waterservices.usgs.gov) - retiring
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Last updatedNot stated
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ATTAINS impaired waters (Clean Water Act assessments)
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Last updated2025-12-30
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U.S. Drought Monitor statistics web service
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Last updatedNot stated
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NOAA National Water Prediction Service (NWPS) API
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Last updatedNot stated
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FEMA National Flood Hazard Layer (NFHL) - effective
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Last updatedNot stated
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GloFAS river discharge forecasts (Global Flood Awareness System)
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Last updated2026-10-17
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WRI Aqueduct 4.0 water risk data
UpdatesWhen it changes
Last updated2023-08-16
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WHO/UNICEF JMP drinking water, sanitation and hygiene
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Last updatedNot stated
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