Is San Jacinto, CA tap water safe?
The short answer
1 of the 4 utilities serving San Jacinto has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and California’s records: Lake Hemet MWD.
Eastern Municipal WD, which serves the most people here, has 4 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 39 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
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 San Jacinto’s ZIP codes, from EPA’s estimates.
- Open report
Eastern Municipal WD
California · serves 659,923 people · about 25,200 in San Jacinto
4 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 39 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
City of San Jacinto
California · serves 20,938 people · about 4,100 in San Jacinto
3 results above the health goal. The worst: Lead at 1.2 ppb, above the health goal. Hardness: moderately hard to very hard depending on the source, 117 to 201 mg/L (6.8 to 11.8 grains per gallon).
No health-based violations since 2016
- Open report
Lake Hemet MWD
California · serves 52,913 people · about 370 in San Jacinto
2 results above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 16.2 ppb, above EPA’s health benchmark. Hardness: soft to very hard depending on the source, 53 to 276 mg/L (3.1 to 16.1 grains per gallon).
1 health-based violation since 2016
- Open report
Golden Era Productions
California · serves 500 people · under 100 in San Jacinto
1 result above the health goal. The worst: Lead at 3.5 ppb, above the health goal. Hardness: moderately hard, typically 101 mg/L (5.9 grains per gallon).
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Eastern Municipal WD’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Nitrate, Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Nitrate, Arsenic, Lead
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Nitrate, Lead
Water testing near San Jacinto
The 3 labs California certifies closest to San Jacinto, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Babcock Laboratories, Inc.
Riverside, CA · about 21 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
BSK Associates - San Bernardino Analytical Laboratory
San Bernardino, CA · about 25 miles
Certified for bacteria
Clinical Laboratory of San Bernardino, Inc.
Grand Terrace, CA · about 26 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Which ZIP codes are in San Jacinto: 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.
Near San Jacinto
Other towns in Riverside County with a page of their own.
What to do next
- Read Eastern Municipal WD’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water