- EPA's UCMR 5 testing looked for 30 contaminants here and found 9.
- Lithium: found in 15 of 18 samples, average 21.8 µg/L, highest 53.1 µg/L (EPA UCMR 5 testing, Jun 2023–Mar 2024)
- PFPeA (a PFAS): found in 9 of 18 samples, average 4.6 ppt, highest 22.6 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024)
- PFOA (a PFAS): found in 7 of 18 samples, average 4.2 ppt, highest 16.9 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFBA (a PFAS): found in 9 of 18 samples, average 3.6 ppt, highest 13.3 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024)
- PFHxA (a PFAS): found in 8 of 18 samples, average 3.4 ppt, highest 14.2 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024)
- PFBS (a PFAS): found in 6 of 18 samples, average 2 ppt, highest 6.9 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024)
- PFHxS (a PFAS): found in 6 of 18 samples, average 1.9 ppt, highest 7.6 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024)
- PFOS (a PFAS): found in 5 of 18 samples, average 1.6 ppt, highest 7.5 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024)
- PFHpA (a PFAS): found in 5 of 18 samples, average 1.3 ppt, highest 6.3 ppt (EPA UCMR 5 testing, Jun 2023–Apr 2024)
- 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 Santa Clarita tap water? What EPA records show
EPA CA1910240 · serves Los Angeles County, CA · about 292,014 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
Santa Clarita Valley Water Agency (EPA CA1910240)
EPA data as of October 14, 2026. For Santa Clarita's main utility, Santa Clarita Valley Water Agency: We found no health-based violations in EPA's records for this system (CA1910240) 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 Santa Clarita Valley Water Agency, as of October 14, 2026
We found no health-based violations in EPA's records for this system (CA1910240) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Santa Clarita Valley Water Agency (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 9.
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 Santa Clarita Valley Water Agency use chloramine?
EPA treatment records (state-reported) list chloramines for Santa Clarita Valley Water Agency. EPA record