Highlands Ranch, Colorado Water Quality Report
Water quality data for 4 water systems serving 104,727 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 35.2 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 352% | Above guideline |
| PFBA | 0.009 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.005 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeA | 0.006 | 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 (8)
4H
Jul 2, 2025
4H
Jul 2, 2025
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (189)
36
Nov 1, 2024 — Nov 30, 2024
36
Nov 1, 2024 — Nov 30, 2024
36
Nov 1, 2024 — Nov 30, 2024
71
Jul 1, 2024
71
Jul 1, 2024
+ 184 more resolved violations
Frequently Asked Questions
Is Highlands Ranch tap water safe to drink?
Highlands Ranch'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 Highlands Ranch tap water?
5 contaminants have been detected in Highlands Ranch's water supply across 4 water systems. See the full contaminant table above for details.
How can I improve my water quality in Highlands Ranch?
Install a water filter rated for the specific contaminants found in Highlands Ranch's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Highlands Ranch have any water quality violations?
Yes, Highlands Ranch currently has 8 active violations. See the violations section above for details.