Cortez, Colorado Water Quality Report
Water quality data for 4 water systems serving 9,556 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 25.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 250% | Above guideline |
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Compliance & Violations
Active Violations (56)
66
Oct 1, 2025
66
Oct 1, 2025
66
Oct 1, 2025
66
Oct 1, 2025
75
Sep 8, 2025
75
Sep 8, 2025
51
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
51
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
75
Jun 8, 2025
75
Jun 8, 2025
5A
Apr 11, 2025
5A
Apr 11, 2025
35
Apr 11, 2025
35
Apr 11, 2025
5A
Apr 11, 2025
35
Apr 11, 2025
35
Apr 11, 2025
5A
Apr 11, 2025
75
Mar 8, 2025
75
Mar 8, 2025
66
Jan 1, 2025
66
Jan 1, 2025
66
Jan 1, 2025
75
Dec 8, 2024
75
Dec 8, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
71
Jul 1, 2024
71
Jul 1, 2024
71
Jul 1, 2024
76
Oct 6, 2023
76
Oct 6, 2023
76
Jul 6, 2023
76
Jul 6, 2023
71
Oct 19, 1999
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (297)
3A
Mar 1, 2025 — Mar 31, 2025
36
Mar 1, 2025 — Mar 31, 2025
3A
Mar 1, 2025 — Mar 31, 2025
3A
Mar 1, 2025 — Mar 31, 2025
36
Mar 1, 2025 — Mar 31, 2025
+ 292 more resolved violations
Frequently Asked Questions
Is Cortez tap water safe to drink?
Cortez'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 Cortez tap water?
1 contaminants have been detected in Cortez's water supply across 4 water systems. See the full contaminant table above for details.
How can I improve my water quality in Cortez?
Install a water filter rated for the specific contaminants found in Cortez's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Cortez have any water quality violations?
Yes, Cortez currently has 56 active violations. See the violations section above for details.