States › Arizona › Navajo County

Navajo County, AZ Water Quality

Water quality data for 26 public water systems serving Navajo County, Arizona — based on EPA SDWIS enforcement records, lead testing results, and health-based violation history.

📅 2026 Report 🔄 Data updated 2026 Q2 📍 26 water systems · 34 cities
⚠️
Caution Advised — Some Systems Need Attention

Some systems have elevated lead levels or active violations. Check your specific city below.

C

Navajo County Earns a C

Navajo County: 34 communities across 26 water systems. 50.0% have no open violations.

  • Median lead where detected: 1.00 ppb
  • 20 communities with a lead detection, 14 reporting none detected
  • 0 communities with PFAS above the federal limit
  • 20 with significant inspection deficiencies
  • 50.0% of communities have no open violations
1 ppb
Median Lead Level
County-wide, 90th percentile
26
Water Systems
Active CWS & NTNCWS
50%
Violation-Free
No active violations on record
How we grade counties: MyWaterIQ uses EPA SDWIS enforcement data — actual MCL violations and lead test results — not the aspirational MCLG targets used by some sites. A grade reflects real compliance history, not theoretical risk. Learn more →

Cities by Water Quality

⭐ Best Performing
  • Winslow
    Not detected
    No federal limits exceeded on record
    A
  • Snowflake
    1.70 ppb
    No federal limits exceeded on record
    A
  • Taylor
    Not detected
    No federal limits exceeded on record
    B
  • Heber-Overgaard
    Not detected
    No federal limits exceeded on record
    A
  • Pinetop Country Club
    Not detected
    No federal limits exceeded on record
    A
⚠ Needs Attention
  • Fort Apache
    1.00 ppb
    9 violations currently open
    F
  • Whiteriver
    1.00 ppb
    9 violations currently open
    F
  • Cibecue
    1.00 ppb
    2 violations currently open
    F
  • Rainbow City
    1.00 ppb
    9 violations currently open
    F
  • First Mesa
    1.00 ppb
    2 violations currently open
    F
County Lead Level — Median 1 ppb
Based on most recent 90th percentile lead tests across all reporting systems
0 ppb5 ppb10 ppb15 ppb
County median: 1 ppb — 6.7% of the federal action level
Systems by Lead Level
Under 5 ppb
16
5 – 10 ppb
3
10 – 15 ppb
1
No Data
14

All Cities in Navajo County

Show Low Not detected A
Winslow Not detected A
Snowflake 1.70 ppb A
Holbrook Not detected A
Whiteriver 1.00 ppb F
Taylor Not detected B
Lake of the Woods 7.80 ppb A
Heber-Overgaard Not detected A
Pinetop-Lakeside 10.00 ppb B
Joseph City Not detected B
White Mountain Lake Not detected C
Cibecue 1.00 ppb F
Linden Not detected B
Pinetop Country Club Not detected A
Rainbow City 1.00 ppb F
Wagon Wheel Not detected C
First Mesa 1.00 ppb F
Shongopovi 0.60 ppb D
East Fork 1.00 ppb F
North Fork 1.00 ppb F
Hotevilla-Bacavi 5.00 ppb F
Seven Mile 1.00 ppb F
Hondah 1.00 ppb D
Turkey Creek 1.00 ppb F
Kykotsmovi Village 1.60 ppb D
Clay Springs 2.80 ppb B
Pinedale Not detected D
Winslow West Not detected A
Second Mesa 5.00 ppb F
Shumway Not detected B
Woodruff 3.00 ppb D
Keams Canyon 1.10 ppb C
Sun Valley Not detected B
Fort Apache 1.00 ppb F
Showing 34 cities
No active violations Active violations

About Navajo County Drinking Water

Navajo County is served by 26 water systems covering 34 communities. 50% have no open violations.

Of the communities reporting lead results, 20 recorded a detection, with a median of 1.00 ppb — 7% of the federal action level. 14 reported none detected, which means below the laboratory limit rather than an absence of lead.

No community here has PFAS above the federal limit on record. State inspectors recorded significant deficiencies at 20 of them.

Frequently Asked Questions

Is Navajo County tap water safe to drink?▼
50% of communities have no open violation. No community has PFAS above the federal limit on record.
What is the lead level in Navajo County?▼
Among communities with a detection the median is 1.00 ppb, 7% of the 15 ppb action level. 14 reported none detected and 0 reported no result.
How many water systems serve Navajo County?▼
26 community water systems serve 34 communities here.
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