- EPA's UCMR 5 testing looked for 30 contaminants here and found 7.
- Lithium: found in 4 of 4 samples, average 33.9 µg/L, highest 36.1 µg/L (EPA UCMR 5 testing, Feb 2025–Nov 2025)
- PFHxA (a PFAS): found in 3 of 3 samples, average 6.5 ppt, highest 8.6 ppt (EPA UCMR 5 testing, Feb 2025–Sep 2025)
- PFPeA (a PFAS): found in 3 of 3 samples, average 6.5 ppt, highest 8.4 ppt (EPA UCMR 5 testing, Feb 2025–Sep 2025)
- PFOS (a PFAS): found in 3 of 3 samples, average 5.3 ppt, highest 5.9 ppt (EPA UCMR 5 testing, Feb 2025–Sep 2025) PFOA or PFOS averaged above 4.0 ppt in UCMR 5 testing
- PFBA (a PFAS): found in 2 of 3 samples, average 4.6 ppt, highest 7.6 ppt (EPA UCMR 5 testing, Feb 2025–Sep 2025)
- PFHxS (a PFAS): found in 2 of 3 samples, average 3.3 ppt, highest 5.8 ppt (EPA UCMR 5 testing, Feb 2025–Sep 2025)
- PFHpA (a PFAS): found in 1 of 3 samples, average 1.2 ppt, highest 3.6 ppt (EPA UCMR 5 testing, Feb 2025–Sep 2025)
- Lead, 90th percentile: 1.5 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.
- Health-based violation: Lead and Copper Rule, LEAD AND COPPER RULE REVISIONS, from Oct 2024, with no return-to-compliance action in EPA records (EPA SDWIS)
Public EPA test results
Can you drink Weslaco tap water? What EPA records show
EPA TX1080011 · serves Hidalgo County, TX · about 40,033 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
City of Weslaco (EPA TX1080011)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Weslaco's main utility, City of Weslaco: 1 health-based violation since July 1, 2021 in EPA records (EPA SDWIS). This water system averaged above 4.0 ppt for PFOA or PFOS in EPA's UCMR 5 testing.
What EPA records show for City of Weslaco, as of October 14, 2026
Health-based violation: Lead and Copper Rule, LEAD AND COPPER RULE REVISIONS, from Oct 2024, with no return-to-compliance action in EPA records (EPA SDWIS).
Lead, 90th percentile: 1.5 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 7.
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 City of Weslaco use chloramine?
We didn't find chloramine in City of Weslaco'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)