Centennial, Colorado Water Quality Report
Water quality data for 13 water systems serving 106,959 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 23.2 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 232% | Above guideline |
| PFBA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.006 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.007 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFOA | 0.005 | 0.004 ug/L | 0.090 ug/L(EWG) | 115% | Above limit |
| PFPeA | 0.008 | 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 (10)
51
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
35
Apr 11, 2025
5A
Apr 11, 2025
5A
Apr 11, 2025
35
Apr 11, 2025
Resolved Violations (490)
66
Oct 1, 2025
66
Oct 1, 2025
66
Oct 1, 2025
66
Oct 1, 2025
71
Jul 1, 2019
+ 485 more resolved violations
Frequently Asked Questions
Is Centennial tap water safe to drink?
Centennial'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 Centennial tap water?
6 contaminants have been detected in Centennial's water supply across 13 water systems. See the full contaminant table above for details.
How can I improve my water quality in Centennial?
Install a water filter rated for the specific contaminants found in Centennial's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Centennial have any water quality violations?
Yes, Centennial currently has 18 active violations. See the violations section above for details.