- EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
- Lithium: found in 8 of 12 samples, average 12.9 µg/L, highest 26.3 µg/L (EPA UCMR 5 testing, Mar 2024–Dec 2024)
Public EPA test results
What EPA records show for North Collin SUD
EPA TX0430055 · serves Collin County, TX · about 10,716 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
North Collin SUD (EPA TX0430055)
What EPA records show for North Collin SUD, as of October 14, 2026
Health-based violation: Total Coliform Rules, Revised Total Coliform Rule, May 2025–Oct 2025 (EPA SDWIS).
Lead, 90th percentile: 1.93 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.
EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
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 North Collin SUD use chloramine?
We didn't find chloramine in North Collin SUD's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)