- EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
- Lithium: found in 3 of 4 samples, average 12.2 µg/L, highest 17.5 µg/L (EPA UCMR 5 testing, Jul 2024–Apr 2025)
- PFPeA (a PFAS): found in 4 of 4 samples, average 55.3 ppt, highest 74.9 ppt (EPA UCMR 5 testing, Jul 2024–Apr 2025)
- PFBA (a PFAS): found in 4 of 4 samples, average 19 ppt, highest 30.8 ppt (EPA UCMR 5 testing, Jul 2024–Apr 2025)
- PFHxA (a PFAS): found in 3 of 4 samples, average 2.8 ppt, highest 4.4 ppt (EPA UCMR 5 testing, Jul 2024–Apr 2025)
- PFBS (a PFAS): found in 3 of 4 samples, average 2.4 ppt, highest 3.4 ppt (EPA UCMR 5 testing, Jul 2024–Apr 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, 2022–Dec 31, 2024). 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 San Leon tap water? What EPA records show
EPA TX0840063 · serves Galveston County, TX · about 11,622 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
San Leon MUD (EPA TX0840063)
EPA data as of October 14, 2026. For San Leon's main utility, San Leon MUD: We found no health-based violations in EPA's records for this system (TX0840063) 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 San Leon MUD, as of October 14, 2026
We found no health-based violations in EPA's records for this system (TX0840063) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for San Leon MUD (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, 2022–Dec 31, 2024). 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 San Leon MUD use chloramine?
EPA treatment records (state-reported) list chloramines for San Leon MUD. EPA record