ZIP Code 85648
High RiskPFAS above EPA limits detected
3 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.
7
PFAS Detected
3
Above EPA Limits
1
Water System
1023%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 1023% of limit
Detected: 40.90 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 250% of limit
Detected: 10.00 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 109% of limit
Detected: 10.90 ppt
LIBERTY WATER RIO RICO
AZ0412011 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
3
State
Arizona
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 40.90ppt | 1023% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 10.00ppt | 250% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 10.90ppt | 109% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFBS Perfluorobutane sulfonic acid | 20.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.00ppt | No federal limit | — | Unregulated |
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.