ZIP Code 85741
High RiskPFAS above EPA limits detected
2 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.
8
PFAS Detected
2
Above EPA Limits
3
Water Systems
575%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 575% of limit
Detected: 23.00 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 150% of limit
Detected: 15.00 ppt
METROPOLITAN DWID
AZ0410076 Low LevelWater Type
Groundwater
PFAS Detected
3
Above MCL
0
State
Arizona
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 3.90ppt | 39% of limit
| 10 ppt | Below limit |
lithium | 18300.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.80ppt | No federal limit | — | Unregulated |
TUCSON CITY OF
AZ0410112 Low LevelWater Type
Groundwater
PFAS Detected
2
Above MCL
0
State
Arizona
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 63700.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 8.10ppt | No federal limit | — | Unregulated |
MARANA MUNICIPAL - HARTMAN VISTAS
AZ0410329 High RiskWater Type
Groundwater
PFAS Detected
3
Above MCL
2
State
Arizona
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 23.00ppt | 575% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 15.00ppt | 150% of limit
| 10 ppt | ⚠ Exceeds MCL |
lithium | 17000.00ppt | No federal limit | — | Unregulated |
Note: ZIP code 85741 is served by 3 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.