Coconino County, Arizona
36 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Safe water is the norm for most of Coconino County's 36 ZIP codes — but a notable subset have documented violations that push the grade to the middle tier.
How Coconino County Compares
How Coconino County Compares
Coconino County scores 1 points below the Arizona state average (64/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Coconino County, Arizona
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12 (asthma 12.1%, diabetes 11%)
Estimated additional annual cost per homeowner: $2,170, driven primarily by wildfire
Infrastructure: 0.319% avg pipe failure probability, 9% of ZIPs at high risk
43.8% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Coconino County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 46 violations. Past 5 years: 98 total (98 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,170
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
87,012 housing units in Coconino County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Coconino County
Remediation costs are relatively manageable for most homeowners in Coconino County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Coconino County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Coconino County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Flagstaff | 76,960 | 120 |
| 2 | Doney Park Water | 8,996 | 120 |
| 3 | Kachina Village Dwid | 3,500 | 120 |
| 4 | Forest Highlands Water Company | 1,668 | 120 |
| 5 | Ponderosa Utility Corporation | 1,585 | 120 |
35 total water systems serve Coconino County.
All ZIP Codes in Coconino County
36 ZIP codes tracked in Coconino County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 86038 | Mormon Lake | 82 | B | 5 (1 health) | $268K |
| 2 | 86022 | Fredonia | 81 | B | 36 (1 health) | $224K |
| 3 | 86040 | Page | 81 | B | 29 (2 health) | $125K |
| 4 | 86339 | Sedona | 79 | B | 15 (1 health) | — |
| 5 | 86015 | Bellemont | 78 | B | 13 (1 health) | $457K |
| 6 | 86017 | Munds Park | 78 | B | 0 | $397K |
| 7 | 86020 | Cameron | 77 | B | 47 (2 health) | $60K |
| 8 | 85931 | Forest Lakes | 75 | B | 6 (1 health) | $413K |
| 9 | 86046 | Williams | 74 | B | 29 (6 health) | $368K |
| 10 | 86024 | Happy Jack | 70 | B | 5 | $427K |
| 11 | 86336 | Sedona | 70 | B | 15 (1 health) | $705K |
| 12 | 86005 | Flagstaff | 69 | C | 20 | $556K |
| 13 | 86002 | Flagstaff | 65 | C | 20 | — |
| 14 | 86003 | Flagstaff | 65 | C | 20 | $163K |
| 15 | 86011 | Flagstaff | 65 | C | 20 | — |
| 16 | 86001 | Flagstaff | 64 | C | 20 | $571K |
| 17 | 85933 | Overgaard | 63 | C | 0 | $308K |
| 18 | 86023 | Grand Canyon | 60 | C | 54 (6 health) | $18K ⚠ |
| 19 | 86004 | Flagstaff | 59 | C | 20 | $464K |
| 20 | 86016 | Gray Mountain | 53 | D | 0 | $31K |
| 21 | 86018 | Parks | 53 | D | 0 | $559K |
| 22 | 86030 | Hotevilla | 53 | D | 0 | $126K |
| 23 | 86033 | Kayenta | 53 | D | 0 | $38K |
| 24 | 86036 | Marble Canyon | 53 | D | 0 | $58K |
| 25 | 86039 | Kykotsmovi Village | 53 | D | 0 | $114K |
| 26 | 86044 | Tonalea | 53 | D | 0 | $63K |
| 27 | 86045 | Tuba City | 53 | D | 0 | $68K |
| 28 | 86052 | North Rim | 53 | D | 0 | — |
| 29 | 86053 | Kaibeto | 53 | D | 0 | $49K |
| 30 | 86054 | Shonto | 53 | D | 0 | $74K |
| 31 | 86411 | Hackberry | 53 | D | 0 | $146K |
| 32 | 86412 | Hualapai | 53 | D | 0 | — |
| 33 | 86435 | Supai | 53 | D | 0 | — |
| 34 | 86510 | Pinon | 53 | D | 0 | $104K |
| 35 | 86535 | Dennehotso | 53 | D | 0 | $44K |
| 36 | 86545 | Rock Point | 53 | D | 0 | $36K |
Recommended Buyer Guides for Coconino County
Federal and certification sources drive the ordering: EPA monitoring data, NSF certifications, FEMA flood maps, and CDC lead guidance — guides surface only when county data warrants them.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Coconino County, Arizona
Overview
Coconino County in Arizona covers 36 ZIP codes with an average Home Safety Score of C (63/100).
17 of 36 ZIP codes have recorded EPA violations. 22 health-based violations have been documented.
← Back to Arizona water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.