Katy, Texas Water Quality Report
Water quality data for 11 water systems serving 47,674 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 36.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 360% | Above guideline |
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Compliance & Violations
Active Violations (5)
34
Jun 24, 2025
58
Oct 1, 2023
58
Oct 1, 2023
58
Oct 1, 2023
75
Aug 21, 2016
Resolved Violations (495)
66
Mar 31, 2024
66
Mar 31, 2024
66
Mar 31, 2024
75
Feb 17, 2024
75
Feb 17, 2024
+ 490 more resolved violations
Frequently Asked Questions
Is Katy tap water safe to drink?
Katy's water meets all EPA maximum contaminant levels. However, 1 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Katy tap water?
1 contaminants have been detected in Katy's water supply across 11 water systems. See the full contaminant table above for details.
How can I improve my water quality in Katy?
Install a water filter rated for the specific contaminants found in Katy's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Katy have any water quality violations?
Yes, Katy currently has 38 active violations. See the violations section above for details.