Seguin, Texas Water Quality Report
Water quality data for 6 water systems serving 68,371 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 36.3 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 363% | Above guideline |
| PFBA | 0.010 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFOS | 0.004 | 0.004 ug/L | 0.300 ug/L(EWG) | 110% | Above limit |
| PFPeA | 0.004 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
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Compliance & Violations
Active Violations (25)
75
May 1, 2025
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
71
Jul 1, 2024
71
Jul 1, 2024
66
Dec 30, 2023
66
Dec 30, 2023
71
Jul 1, 2023
71
Jul 1, 2023
51
Jan 1, 2021
51
Jan 1, 2021
51
Jan 1, 2021
51
Jan 1, 2021
51
Jan 1, 2021
66
Dec 30, 2020
66
Dec 30, 2020
75
Mar 15, 2019
Resolved Violations (475)
3A
Sep 1, 2025 — Sep 30, 2025
3A
Aug 1, 2025 — Aug 31, 2025
75
Jul 24, 2025
75
Jul 24, 2025
3A
Jul 1, 2025 — Jul 31, 2025
+ 470 more resolved violations
Frequently Asked Questions
Is Seguin tap water safe to drink?
Seguin's water has 1 contaminant detected above EPA limits. While the water is treated, residents may want to consider additional filtration.
What contaminants are in Seguin tap water?
4 contaminants have been detected in Seguin's water supply across 6 water systems. See the full contaminant table above for details.
How can I improve my water quality in Seguin?
Install a water filter rated for the specific contaminants found in Seguin's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Seguin have any water quality violations?
Yes, Seguin currently has 76 active violations. See the violations section above for details.