F13/100
Cortez Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 8,770 residents · Colorado
What's In Cortez's Tap Water?
31
Contaminants Tested
0
Exceed EPA Limits
1
Above EPA Goals
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
CORTEZ CITY OF
Population Served
8,770
Water Source
Surface Water
System ID
CO0142200
Frequently Asked Questions About Cortez Water
Is Cortez tap water safe to drink?
Cortez, Colorado tap water receives a grade of F (13/100), which is considered failing. 0 contaminant(s) exceed EPA maximum contaminant levels and 76 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Cortez's water?
Of the 31 contaminants tested in Cortez's water supply, the most notable include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Cortez have any water quality violations?
Yes, Cortez has 76 EPA violation(s) on record, with the most recent in 2020. Violation types include TT, MR. 2 of these are health-based violations, which are the most serious category.
Do I need a water filter in Cortez?
Cortez water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. 1 contaminant(s) exceed these stricter goals.
Where does Cortez's tap water come from?
Cortez's drinking water is sourced from surface water and supplied by CORTEZ CITY OF. The system serves approximately 8,770 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Cortez's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Cortez's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Cortez's water compare to other cities in Colorado?
Cortez's water quality score of 13/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Colorado state page to see how all cities in the state compare.
What should I do if I'm concerned about Cortez's water quality?
If you have concerns about Cortez's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (CORTEZ CITY OF) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.