Denison, Texas Water Quality Report
Water quality data for 6 water systems serving 34,254 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 20.1 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 201% | Above guideline |
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Compliance & Violations
Active Violations (5)
66
Sep 29, 2025
57
Jan 1, 2024
57
Jan 1, 2024
57
Jan 1, 2024
75
Feb 8, 2016
Resolved Violations (495)
66
Apr 1, 2025
66
Apr 1, 2025
3A
Feb 1, 2025 — Feb 28, 2025
3A
Feb 1, 2025 — Feb 28, 2025
3A
Feb 1, 2025 — Feb 28, 2025
+ 490 more resolved violations
Frequently Asked Questions
Is Denison tap water safe to drink?
Denison'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 Denison tap water?
1 contaminants have been detected in Denison's water supply across 6 water systems. See the full contaminant table above for details.
How can I improve my water quality in Denison?
Install a water filter rated for the specific contaminants found in Denison's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Denison have any water quality violations?
Yes, Denison currently has 43 active violations. See the violations section above for details.