Your local water, explained
California water quality reports
Start with your county, then match the provider on your water bill. Review hardness, disinfection and measured contaminants in plain English.
Southern California launch: five county hubs and five city reports. Coverage is limited to the named utilities; this is not statewide coverage.
Choose your county
Each hub shows the covered utility, its city report and links to other local providers. No city measurement is presented as a countywide average.
Los Angeles County
The detailed results below belong to LADWP. Its source averages span moderately hard to very hard water, so the supplying source matters when planning scale control.
Browse reports → CaliforniaSan Diego County
The detailed results below belong to the City of San Diego system. Its three City plant averages are very hard, while purchased treated water differs. Neighboring districts need their own data.
Browse reports → CaliforniaOrange County, California
The detailed results below belong to Anaheim Public Utilities. All three of its source hardness averages are very hard. Use the supplier on your bill to decide whether this report applies.
Browse reports → CaliforniaRiverside County
The detailed results below belong to Riverside Public Utilities. Its reported hardness average is very hard, but this groundwater blend does not represent every supplier across the county.
Browse reports → CaliforniaSan Bernardino County
The detailed results below belong to San Bernardino Municipal Water Department. Its very hard average supports scale treatment for that system; other districts and private wells need their own evidence.
Browse reports →Choose your city
Los Angeles
Hardness changes with your water supply. Chloramine is a separate filtration consideration.
Browse reports → CitySan Diego
Very hard City plant water makes scale control worth planning alongside chloramine filtration.
Browse reports → CityAnaheim
Very hard source averages, chlorine disinfection and a byproduct result close to its limit.
Browse reports → CityRiverside
A very hard groundwater blend: filtration and softening address different goals.
Browse reports → CitySan Bernardino
Very hard water, chlorine treatment and results that need their original dates.
Browse reports →First covered systems: LADWP, City of San Diego, Anaheim Public Utilities, Riverside Public Utilities and San Bernardino Municipal Water Department. Private wells need current testing.
What this means for your home
These are utility measurements, not a test at your tap or a current service advisory.
We keep each utility’s results separate, show the reported sample year, and distinguish averages, maxima and tap-sampling percentiles. Hardness classifications use USGS ranges. Missing data stays unknown.
Your water → your home → your system
Turn your report into a plan for your home.
Choose the system size, keep useful existing equipment, and review your filtration goals.