- EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
- Lithium: found in 2 of 6 samples, average 5.17 µg/L, highest 17 µg/L (EPA UCMR 5 testing, Dec 2024–Aug 2025)
- PFOS (a PFAS): found in 2 of 6 samples, average 4.1 ppt, highest 16 ppt (EPA UCMR 5 testing, Dec 2024–Aug 2025) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFBA (a PFAS): found in 2 of 6 samples, average 2.8 ppt, highest 9.5 ppt (EPA UCMR 5 testing, Dec 2024–Aug 2025)
- PFOA (a PFAS): found in 2 of 6 samples, average 1.9 ppt, highest 7 ppt (EPA UCMR 5 testing, Dec 2024–Aug 2025)
- PFBS (a PFAS): found in 2 of 6 samples, average 1.2 ppt, highest 4.2 ppt (EPA UCMR 5 testing, Dec 2024–Aug 2025)
- PFHxS (a PFAS): found in 1 of 6 samples, average 0.60 ppt, highest 3.8 ppt (EPA UCMR 5 testing, Dec 2024–Aug 2025)
- PFPeA (a PFAS): found in 1 of 6 samples, average 0.60 ppt, highest 3.5 ppt (EPA UCMR 5 testing, Dec 2024–Aug 2025)
- Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2023–Dec 31, 2025). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
Public EPA test results
Can you drink La Mirada tap water? What EPA records show
EPA CA1910059 · serves Los Angeles County, CA · about 57,240 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Suburban Water Systems-La Mirada (EPA CA1910059)
EPA data as of October 14, 2026. For La Mirada's main utility, Suburban Water Systems-La Mirada: We found no health-based violations in EPA's records for this system (CA1910059) since July 1, 2021, as of October 14, 2026. This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
What EPA records show for Suburban Water Systems-La Mirada, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA1910059) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Suburban Water Systems-La Mirada (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 0 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jan 1, 2023–Dec 31, 2025). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
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 Suburban Water Systems-La Mirada use chloramine?
We didn't find chloramine in Suburban Water Systems-La Mirada's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.