- EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
- Lithium: found in 6 of 19 samples, average 3.97 µg/L, highest 16.2 µg/L (EPA UCMR 5 testing, Apr 2024–Mar 2025)
Public EPA test results
What EPA records show for Lake Hemet MWD
EPA system ID CA3310022 · serves Riverside County, CA · about 52,913 people (EPA records)
Here's what EPA has on file for this water system: its testing for newer contaminants like PFAS (UCMR 5), lead testing and violations. It's not a test of your tap, and there's no Water Score here.
Public EPA test results
Lake Hemet MWD (EPA CA3310022)
What EPA records show for Lake Hemet MWD, as of October 14, 2026
Health-standard violation: Total Coliform Rules, Revised Total Coliform Rule, Jun 2022–Jun 2022 (EPA SDWIS).
Lead: 9 in 10 homes tested came in at or below 0 ppb, at or below EPA's 15 ppb action level (latest EPA result for a testing period that ran on or after July 1, 2021: Jan 1, 2023–Dec 31, 2025). This is one number for the whole water system, from homes the utility tested. It isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Lake Hemet MWD use chloramine?
We didn't find chloramine in Lake Hemet MWD's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)