June 14, 2026
Flagstaff, AZ Water Quality Report 2026
Water Utility: City of Flagstaff
Population Served: 76,960 residents
Data Sources: EPA SDWIS + EPA UCMR5
Report Year: 2026
Flagstaff, Arizona drinking water is supplied by City of Flagstaff. This report summarizes health-based violations and PFAS detections from federal EPA databases.
EPA Health-Based Violation History
The following contaminants exceeded EPA MCLs at this utility since 2010:
| Contaminant | Violation Years | Filter Solution |
|---|---|---|
| Total Haloacetic Acids (HAA5) | 2015 | Whole House Filters |
Source: EPA SDWIS, updated quarterly. Health-based violations only.
PFAS "Forever Chemical" Detections
PFAS compounds were detected during EPA UCMR5 testing (2023-2025).
| PFAS Compound | Level Detected | Solution |
|---|---|---|
| PFBA | 0.0061 ug/L | PFAS Filters |
Source: EPA UCMR5. Levels in ug/L. 1 ug/L = 1,000 ppt.
Should You Filter Your Flagstaff Water?
Flagstaff had a haloacetic acid violation in 2015 and PFAS has been detected recently. Filtration is recommended for all households.
Protect Your Flagstaff Home Water
PureWaterGuys.com carries whole-house and under-sink systems that address haloacetic acids and PFAS. We ship to all Arizona addresses.
Shop Whole House Filters →Take the Water QuizFAQ
Is Flagstaff tap water safe to drink?
City of Flagstaff meets current EPA standards but had a haloacetic acid (HAA5) violation in 2015, and PFBA was detected in UCMR5 testing.
Does Flagstaff water have PFAS?
PFBA was detected during EPA UCMR5 monitoring. A whole-house carbon block or reverse osmosis system is recommended.
What filter works best for Flagstaff?
A whole-house carbon block filter addresses haloacetic acids and chlorine. For PFAS, a reverse osmosis system provides the highest reduction. Take our quiz.
Data sourced from EPA SDWIS and UCMR5. PureWaterGuys.com is not affiliated with any municipal water utility.