- EPA's UCMR 5 testing looked for 30 contaminants here and found 1.
- PFBA (a PFAS): found in 4 of 4 samples, average 6.2 ppt, highest 7.3 ppt (EPA UCMR 5 testing, Feb 2023–Nov 2023)
Public EPA test results
What EPA records show for Walnut Creek SUD
EPA TX1840008 · serves Parker County, TX · about 40,410 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
Walnut Creek SUD (EPA TX1840008)
What EPA records show for Walnut Creek SUD, as of October 14, 2026
Health-based violation: Lead and Copper Rule, LEAD AND COPPER RULE REVISIONS, Oct 2024–Apr 2025 (EPA SDWIS).
Lead, 90th percentile: 1.2 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 1.
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 Walnut Creek SUD use chloramine?
EPA treatment records (state-reported) list chloramines for Walnut Creek SUD. EPA record
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)