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Updated 2026-10-15
County water report

Yavapai County Water Quality: 4 Cities Ranked by the Records

Yavapai County, Arizona: 4 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.

Find my systemOpen on the mapPrivate wells in Yavapai County
Across the county's systems

Highest result for each contaminant

One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.

LithiumDetected in 4 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest52.5 µg/L
Perfluorooctanoic acid (PFOA)Detected in 1 system of 4 tested4.0 ng/L federal MCL (2024) · US EPAHighest11.4 ng/L
Perfluorooctanesulfonic acid (PFOS)Detected in 1 system of 4 tested4.0 ng/L federal MCL (2024) · US EPAHighest8.7 ng/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 1 system of 4 tested10 ng/L federal MCL (2024) · US EPAHighest6.5 ng/L
Perfluorobutanesulfonic acid (PFBS)Detected in 1 system of 4 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest7.5 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 1 system of 4 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest12.6 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 4 testedNo federal or state limit; shown for transparencyHighest3.6 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 4 testedNo federal or state limit; shown for transparencyHighest14.9 ng/L
23 substances tested, none detected in any systemShow

Tested in these 4 systems: COTTONWOOD MUNICIPAL WATER CW1, PRESCOTT CITY OF, TOWN OF CAMP VERDE UTILITIES, TOWN OF PRESCOTT VALLEY

  • 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
  • 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
  • 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
  • 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
  • 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
  • Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
  • Lead (90th percentile)
  • N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
  • N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
  • Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
  • Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
  • Perfluoro-3-methoxypropanoic acid (PFMPA)
  • Perfluoro-4-methoxybutanoic acid (PFMBA)
  • Perfluorobutanoic acid (PFBA)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorononanoic acid (PFNA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
4 cities

Cities ranked by the records

Showing 4 of 4 cities · scores are system-level, not tap tests

Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.

PFAS in Yavapai County1 of 4 city reports had a PFAS sample above a 2024 EPA limit
  1. Prescott8.7 ng/L
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Arizona
Lead

0of 4 cities above the 15 µg/L action level

Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.

Lead in Arizona
Who supplies the county

Largest water systems

  1. Prescott ValleyTOWN OF PRESCOTT VALLEY · AZ0413048
    57,048 served
  2. PrescottPRESCOTT CITY OF · AZ0413045
    42,217 served
  3. CottonwoodCOTTONWOOD MUNICIPAL WATER CW1 · AZ0413025
    11,288 served
  4. Camp VerdeTOWN OF CAMP VERDE UTILITIES · AZ0413015
    5,380 served
Questions

Frequently asked

How does Yavapai County tap water compare across cities?

PurityMap ranks 4 cities in Yavapai County by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Prescott Valley's main water system: TOWN OF PRESCOTT VALLEY · PWSID AZ0413048 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.

How many Yavapai County cities had a PFAS sample above a 2024 EPA limit?

1 of 4 Yavapai County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing, including Prescott (PFOA 11.4 ng/L). That limit is judged on a yearly average, and water systems have until 2029 to meet it, so a single sample is not a violation. PFAS were detected at any level in 2.

Is there lead in Yavapai County tap water?

Utilities report lead as a 90th-percentile result from home taps. 0 of 4 Yavapai County cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.

Have Yavapai County water systems had drinking-water violations?

1 city in Yavapai County has a health-based violation in the federal SDWIS record within about the last ten years. Each city report lists the contaminant, year and whether it was resolved.

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