Arizona

860,018,600,486,011 · Groundwater and surface water

Flagstaff, AZ

Low Risk Updated March 2026 75,038 residents
85
Purity Score

Contaminant Levels

PFAS
ND
Lead
1.2 ppb
Nitrate
0.4 mg/L
Arsenic
0.3 mg/L
Fluoride
0.55 mg/L
Copper
0.2 mg/L
Hardness
5.6 gpg

Values shown in respective units

Health Insights

  • 1
    Flagstaff's water meets EPA standards. Filtration can still improve taste and peace of mind.

Current Score

85 / 100
Excellent
"Good" threshold (70)

Flagstaff tap water is sourced from Groundwater and surface water and treated by City of Flagstaff Water Services. Overall purity score: 85/100 (Excellent). Updated for 2026.

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Frequently Asked Questions

Is Flagstaff AZ tap water safe to drink in 2026?
Flagstaff tap water meets EPA federal drinking water standards and scores 85/100 (Excellent) on PurityMap for 2026. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.
Does Flagstaff AZ use chlorine or chloramine for disinfection?
Flagstaff uses chlorine as the primary disinfectant with a residual level of 1.0 ppm. Standard activated carbon filters including pitcher filters are effective at removing free chlorine taste and odor.
How hard is Flagstaff AZ water and what is the TDS level?
Flagstaff water hardness is 5.6 grains per gallon (moderate) with a TDS of 210 ppm (fair). This level is unlikely to cause significant scale buildup in household plumbing.
Has PFAS been found in Flagstaff AZ drinking water?
Based on available EPA UCMR5 monitoring data as of 2026 PFAS have not been detected above EPA advisory levels in Flagstaff drinking water.

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Data Sources & Methodology

  • EPA Safe Drinking Water Information System (SDWIS)
  • EWG Tap Water Database
  • City of Flagstaff Water Services Consumer Confidence Report (CCR)
  • USGS regional water monitoring data

PurityMap compiles publicly available data and does not perform independent testing.

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