Hays, Kansas Water Quality Report
Water quality data for 7 water systems serving 22,261 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| 6:2 FTS | 0.007 | No federal limit | — | — | No federal limit |
| lithium | 105.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 1050% | Above guideline |
| PFBS | 0.004 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.006 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeA | 0.011 | 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 (13)
4H
Jul 2, 2025
4H
Jul 2, 2025
72
Oct 2, 2023
72
Oct 2, 2023
72
Oct 2, 2023
72
Oct 2, 2023
71
Jul 1, 2023
71
Jul 1, 2023
75
Nov 6, 2022
72
Oct 2, 2022
72
Oct 2, 2022
66
Dec 30, 2018
66
Apr 1, 2018
Resolved Violations (487)
01
Jul 1, 2025 — Sep 30, 2025
01
Jul 1, 2025 — Sep 30, 2025
3A
May 1, 2025 — May 31, 2025
3A
May 1, 2025 — May 31, 2025
3A
May 1, 2025 — May 31, 2025
+ 482 more resolved violations
Frequently Asked Questions
Is Hays tap water safe to drink?
Hays's water meets all EPA maximum contaminant levels. However, 5 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Hays tap water?
5 contaminants have been detected in Hays's water supply across 7 water systems. See the full contaminant table above for details.
How can I improve my water quality in Hays?
Install a water filter rated for the specific contaminants found in Hays's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Hays have any water quality violations?
Yes, Hays currently has 51 active violations. See the violations section above for details.