Is El Cerrito, CA tap water safe?

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in El Cerrito’s ZIP codes, from EPA’s estimates.

• East Bay MUD

  California · serves 1.5 million people · about 22,300 in El Cerrito

  1 result above the health goal. The worst: Uranium at 5.3 ppb, above the health goal. Hardness: soft to moderately hard depending on the source, 17 to 120 mg/L (1 to 7 grains per gallon).

  No health-based violations since 2016

  Open report

• City of Corona

  California · serves 169,380 people · about 2,500 in El Cerrito

  4 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 55.1 ppb, above EPA’s health benchmark. Hardness: hard on average, 146 mg/L (8.5 grains per gallon), ranging from 7.2 to 290 mg/L.

  No health-based violations since 2016

  Open report

MUD stands for municipal utility district, a local water and sewer district common in Texas.

Which ZIP codes are in El Cerrito: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: California State Water Resources Control Board, ELAP accredited laboratories and their fields of accreditation; distances from the Census 2020 ZIP code tabulation area gazetteer.