- EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
- Lithium: found in 24 of 54 samples, average 16 µg/L, highest 55.1 µg/L (EPA UCMR 5 testing, Sep 2023–Sep 2024)
- PFPeA (a PFAS): found in 4 of 54 samples, average 0.30 ppt, highest 6.1 ppt (EPA UCMR 5 testing, Sep 2023–Sep 2024)
- PFBA (a PFAS): found in 2 of 54 samples, average 0.30 ppt, highest 7.6 ppt (EPA UCMR 5 testing, Sep 2023–Sep 2024)
- PFHxA (a PFAS): found in 1 of 54 samples, average 0.10 ppt, highest 3.8 ppt (EPA UCMR 5 testing, Sep 2023–Sep 2024)
- PFHxS (a PFAS): found in 1 of 54 samples, average 0.10 ppt, highest 3.3 ppt (EPA UCMR 5 testing, Sep 2023–Sep 2024)
- Lead, 90th percentile: 1.8 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, 2024–Dec 31, 2026). 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 Corona tap water? What EPA records show
EPA CA3310037 · serves Corona, CA · about 169,380 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
Corona, City of (EPA CA3310037)
EPA data as of October 14, 2026. For Corona's main utility, Corona, City of: We found no health-based violations in EPA's records for this system (CA3310037) since July 1, 2021, as of October 14, 2026. PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for Corona, City of, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA3310037) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Corona, City of (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 1.8 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, 2024–Dec 31, 2026). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
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 Corona, City of use chloramine?
EPA treatment records (state-reported) list chloramines for Corona, City of. EPA record