- EPA's UCMR 5 testing looked for 30 contaminants here and found 5.
- Lithium: found in 12 of 18 samples, average 16.9 µg/L, highest 41 µg/L (EPA UCMR 5 testing, Feb 2023–Nov 2023)
- PFBA (a PFAS): found in 9 of 18 samples, average 7.4 ppt, highest 77.2 ppt (EPA UCMR 5 testing, Feb 2023–Jan 2024)
- PFHxA (a PFAS): found in 10 of 18 samples, average 3.1 ppt, highest 7.7 ppt (EPA UCMR 5 testing, Feb 2023–Jan 2024)
- PFPeA (a PFAS): found in 10 of 18 samples, average 2.8 ppt, highest 5.7 ppt (EPA UCMR 5 testing, Feb 2023–Jan 2024)
- PFBS (a PFAS): found in 6 of 18 samples, average 1.3 ppt, highest 4.3 ppt (EPA UCMR 5 testing, Feb 2023–Jan 2024)
- Lead, 90th percentile: 2.38 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 Argyle tap water? What EPA records show
EPA TX0610019 · serves Denton County, TX · about 12,720 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
Argyle WSC (EPA TX0610019)
EPA data as of October 14, 2026. For Argyle's main utility, Argyle WSC: We found no health-based violations in EPA's records for this system (TX0610019) 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 Argyle WSC, as of October 14, 2026
We found no health-based violations in EPA's records for this system (TX0610019) since July 1, 2021, as of October 14, 2026.
Source: EPA ECHO record for Argyle WSC (SDWIS). Data as of October 14, 2026.
Lead, 90th percentile: 2.38 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 Argyle WSC use chloramine?
EPA treatment records (state-reported) list chloramines for Argyle WSC. EPA record