ZIP Code 85309
High RiskPFAS above EPA limits detected
5 compounds exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.
17
PFAS Detected
5
Above EPA Limits
2
Water Systems
353%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 353% of limit
Detected: 14.10 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 255% of limit
Detected: 10.20 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 189% of limit
Detected: 18.90 ppt
LIBERTY WATER LPSCO
AZ0407046 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
3
State
Arizona
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 14.10ppt | 353% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 10.20ppt | 255% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 18.90ppt | 189% of limit
| 10 ppt | ⚠ Exceeds MCL |
lithium | 166000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 54.60ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 23.20ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 20.30ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 8.40ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 6.10 ppt | No federal limit |
USAF LUKE AIR FORCE BASE
AZ0407305 High RiskWater Type
Groundwater
PFAS Detected
8
Above MCL
2
State
Arizona
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 11.70ppt | 293% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 10.00ppt | 250% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 8.70ppt | 87% of limit
| 10 ppt | Below limit |
lithium | 129000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 12.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 8.10ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 6.50ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.80ppt | No federal limit | — | Unregulated |
Note: ZIP code 85309 is served by 2 separate water utilities.
Results above show data for each system independently.
Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.
UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.
Detection values represent the highest single-sample result measured at entry points to the distribution system.