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Updated 2026-10-15
County water report

Pinal County Water Quality: 7 Cities Ranked by the Records

Pinal County, Arizona: 7 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 Pinal 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 7 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest796 µg/L
Perfluorohexanesulfonic acid (PFHxS)Detected in 2 systems of 7 tested10 ng/L federal MCL (2024) · US EPAHighest7 ng/L
Perfluorobutanesulfonic acid (PFBS)Detected in 2 systems of 7 tested2,000 ng/L EPA health advisory (screening, not a legal limit) · US EPAHighest91.1 ng/L
Perfluorohexanoic acid (PFHxA)Detected in 2 systems of 7 tested400,000 ng/L Michigan EGLE state MCL (strictest US state) · Michigan EGLEHighest18.6 ng/L
Perfluorobutanoic acid (PFBA)Detected in 2 systems of 7 testedNo federal or state limit; shown for transparencyHighest19.9 ng/L
Perfluoroheptanoic acid (PFHpA)Detected in 1 system of 7 testedNo federal or state limit; shown for transparencyHighest9.4 ng/L
Perfluoropentanoic acid (PFPeA)Detected in 2 systems of 7 testedNo federal or state limit; shown for transparencyHighest20.8 ng/L
24 substances tested, none detected in any systemShow

Tested in these 7 systems: ARIZONA WATER CO - APACHE JUNCTION, ARIZONA WATER CO - PINAL VALLEY, EPCOR - SAN TAN, FLORENCE WATER COMPANY, GW SANTA CRUZ WATER CO, LAGO DEL ORO WATER COMPANY, QUEEN CREEK TOWN OF

  • 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)
  • Perfluorodecanoic acid (PFDA)
  • Perfluorododecanoic acid (PFDoA)
  • Perfluoroheptanesulfonic acid (PFHpS)
  • Perfluorononanoic acid (PFNA)
  • Perfluorooctanesulfonic acid (PFOS)
  • Perfluorooctanoic acid (PFOA)
  • Perfluoropentanesulfonic acid (PFPeS)
  • Perfluorotetradecanoic acid (PFTA)
  • Perfluorotridecanoic acid (PFTrDA)
  • Perfluoroundecanoic acid (PFUnA)
7 cities

Cities ranked by the records

Showing 6 of 7 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 Pinal CountyPFAS detected in 3 of 7 cities; none had a sample above a 2024 EPA limit
4.0 ng/L federal MCL · PFOS, ng/LPFAS in Arizona
Lead

0of 7 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. Casa GrandeARIZONA WATER CO - PINAL VALLEY · AZ0411009
    134,432 served
  2. Queen CreekQUEEN CREEK TOWN OF · AZ0407033
    95,502 served
  3. San Tan ValleyEPCOR - SAN TAN · AZ0411128
    87,435 served
  4. MaricopaGW SANTA CRUZ WATER CO · AZ0411131
    84,000 served
  5. Apache JunctionARIZONA WATER CO - APACHE JUNCTION · AZ0411004
    62,055 served
  6. SaddlebrookeLAGO DEL ORO WATER COMPANY · AZ0411117
    18,132 served
  7. FlorenceFLORENCE WATER COMPANY · AZ0411017
    14,593 served
Questions

Frequently asked

How does Pinal County tap water compare across cities?

PurityMap ranks 7 cities in Pinal 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 Queen Creek's main water system: QUEEN CREEK TOWN OF · PWSID AZ0407033 · 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 Pinal County cities had a PFAS sample above a 2024 EPA limit?

None of the 7 Pinal County city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 3.

Is there lead in Pinal County tap water?

Utilities report lead as a 90th-percentile result from home taps. 0 of 7 Pinal 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 Pinal County water systems had drinking-water violations?

3 cities in Pinal County have 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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