Littleton, Colorado Water Quality Report
Water quality data for 29 water systems serving 128,633 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 9.1 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 91% | Near guideline |
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Compliance & Violations
Active Violations (5)
52
Jul 1, 2025
52
Jul 1, 2025
52
Oct 1, 2024
52
Oct 1, 2024
52
Oct 1, 2023
Resolved Violations (495)
76
Jul 26, 2025
76
Jul 26, 2025
5A
Jun 25, 2025
5A
Jun 25, 2025
5A
Jun 25, 2025
+ 490 more resolved violations
Frequently Asked Questions
Is Littleton tap water safe to drink?
Littleton'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 Littleton tap water?
1 contaminants have been detected in Littleton's water supply across 29 water systems. See the full contaminant table above for details.
How can I improve my water quality in Littleton?
Install a water filter rated for the specific contaminants found in Littleton's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Littleton have any water quality violations?
Yes, Littleton currently has 76 active violations. See the violations section above for details.