Flagstaff
Is Flagstaff tap water safe to drink?
Use extra caution — Flagstaff scores 39/100. This report aggregates EPA drinking water data across 5 local systems in Flagstaff. We found 2099 total violations (198 unresolved).
Real-Time Environment
Live: 02:15 PM☀️ No active precipitation. Rainfall can impact surface water turbidity and pollutant runoff in Flagstaff.
Water Quality Impact
🛡️ Home Water Treatment Needs
Should you invest in filtration or softening for your home in Flagstaff?
Expert Advice
Given the safety margin, a Carbon Block or sediment filter is recommended to improve taste and remove trace particulates.
Buying a Filter?
Should you buy a water purifier in Flagstaff? See our analysis.
Baby Formula Safety
Is Flagstaff tap water safe for infants? Critical safety guide.
Homebuyer's Perspective
For those looking to relocate to Flagstaff, water quality is a key factor in long-term property maintenance. With a score of 39/100, we recommend budgeting for high-quality point-of-entry filtration systems to protect your home's value.
Health & Family Safety
Residents should monitor Lead (90th percentile) levels. Pregnant women and families with young children should consult the specific EPA health goals listed below.
View Health Risk Glossary →Compliance Record for Flagstaff
Based on EPA SDWIS violation records and contaminant test results for all water systems serving Flagstaff.
Frequently Asked Questions
Is Flagstaff tap water safe to drink?
Use extra caution — Flagstaff scores 39/100.
How many water systems serve Flagstaff?
Flagstaff is served by 5 public water systems in our latest EPA-backed dataset.
How can I check water quality for my exact address in Flagstaff?
Use the WaterQ search tool to look up your ZIP code and view nearby systems, contaminant levels, and recent violations for Flagstaff.
What is the water quality score for Flagstaff?
The water quality score for Flagstaff is 39 out of 100, based on EPA contaminant data, violation history, and testing results across the 5 systems serving the city.
What are the top contaminants in Flagstaff?
The top contaminants detected in Flagstaff include Lead (90th percentile). View detailed information on our contaminants page.
Flagstaff Water Quality Summary
Flagstaff, AZ receives a water quality score of 39/100 (Grade F) based on EPA Safe Drinking Water Information System (SDWIS) compliance data for 5 public water systems serving the area.
Flagstaff's water quality score is below the national average, indicating a history of EPA violations or elevated contaminant levels. Residents are encouraged to check their specific water system report and consider additional filtration.
Flagstaff's score of 39 is 16 points below the Arizona state average of 55, and below the nationwide average of roughly 78/100 across all U.S. states.
For anyone looking to buy a home or settle down in Flagstaff, the water quality situation in this mid-size Arizona city warrants close attention. Because this community is situated in the arid Desert Southwest—a region characterized by fast-growing urban centers that are heavily groundwater-dependent—local water supplies face significant environmental pressures. Across the multiple water systems serving the area, performance is critically low, resulting in a failing assessment for the community's overall water quality.
Water quality data is sourced from the U.S. EPA SDWIS database and updated quarterly. Learn about our scoring methodology → Read our Arizona water quality rankings report →
Key Contaminants
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Water Systems Serving Flagstaff (5)
Doney Park Water
FPonderosa Utility Corp
FFlagstaff City Of
FForest Highlands Water Company
CKachina Village Dwid
DCheck Your Specific Address
Water quality can vary by neighborhood in Flagstaff.
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Compare Flagstaff water quality: View all states · Contaminant library · How we score water quality