D
52

Poor Water Quality

Fort Collins, CO 80528

Larimer County · Population served: 382,013 · Data updated March 2026

Water Systems Serving This Area

🏔
FT COLLINS CITY OF
Surface water · Pop. 179,901
PWSID: CO0135291
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FT COLLINS LOVELAND WD
Surface water · Pop. 63,532
PWSID: CO0135292
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GREELEY CITY OF
Surface water · Pop. 132,310
PWSID: CO0162321
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BRYAN CO. RWS & SWMD #2
Surface water · Pop. 6,270
PWSID: OK1010604

Contaminants Detected

ContaminantDetected LevelEPA MCLHealth GuidelineStatus
Lead
6.4
15 ppb 1 ppb Warning

Violation History (Last 5 Years)

34Total (5yr)
6Health-Based
22Major

Water Quality Summary

Understanding Your Water in Fort Collins

Tap water quality in Fort Collins, Colorado (80528) receives an overall grade of D (Poor) with a score of 52 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is 13 points below the Colorado state average of 65. Compared to the national average (75), this area scores significantly lower. The area is served by 4 water systems providing water to approximately 382,013 people, using surface water sources. Testing has found elevated levels of Lead that warrant attention. Over the past 5 years, water systems here have accumulated 34 violations, including 6 health-based violations.

Your Score 52/100 D
vs State 13 pts below Colorado avg (65)
vs National 23 pts below national avg (75)

What a Grade D Means

A score of 52/100 signals poor water quality in Fort Collins, CO. Significant issues have been identified, which may include multiple violations, contaminant levels near or above regulatory limits, or PFAS contamination. We recommend reviewing the detailed contaminant data below, considering a certified water filter, and checking your utility's Consumer Confidence Report for the latest information.

Surface water: sourced from rivers, lakes, or reservoirs

Health Information

What These Contaminants Mean for You

⚠️

Lead in Your Water

Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.

Health Effects

Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.

Common Sources

Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.

What You Can Do

If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.

Common Questions

Frequently Asked Questions

Tap water in Fort Collins, Colorado receives a grade of D (Poor) with a score of 52/100. This indicates significant water quality concerns based on violation history, contaminant levels, or enforcement actions. We recommend reviewing the specific contaminants detected below and considering a certified water filter.

ZIP code 80528 is served by 4 water systems using surface water sources, providing water to approximately 382,013 people. Surface water systems are more susceptible to contamination from agricultural runoff, industrial discharge, and weather events, but typically undergo more extensive treatment including filtration and disinfection.

Lead was detected at 6.4 ppb in Fort Collins, Colorado. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.

No PFAS ("forever chemicals") were detected in water systems serving Fort Collins, Colorado during the most recent EPA monitoring period (UCMR5). However, not all water systems have been tested for all PFAS compounds, and new contamination can occur over time.

Water systems serving Fort Collins, Colorado have received 34 violations in the last 5 years, including 6 health-based violations. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.

Based on detected contaminants (lead), residents in Fort Collins, Colorado should consider: NSF/ANSI 53 certified filter — specifically rated for lead reduction. Pitcher filters (like Brita Longlast or PUR) and under-sink systems both work. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.

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