ZIP Code 98371
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.
15
PFAS Detected
2
Above EPA Limits
6
Water Systems
223%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 223% of limit
Detected: 8.90 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 155% of limit
Detected: 6.20 ppt
MILTON CITY OF
WA5354950 Low LevelWater Type
Groundwater
PFAS Detected
4
Above MCL
0
State
Washington
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFPeA Perfluoropentanoic acid | 6.60ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.50ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 5.30ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.70ppt | No federal limit | — | Unregulated |
MOUNTAIN VIEW-EDGEWOOD WATER CO
WA5356820 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Washington
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFBS Perfluorobutane sulfonic acid | 3.60ppt | No federal limit | — | Unregulated |
PUYALLUP CITY OF
WA5370050 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Washington
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFBS Perfluorobutane sulfonic acid | 4.40ppt | No federal limit | — | Unregulated |
SOUTHWOOD WATER SYSTEM
WA5382844 High RiskWater Type
Groundwater
PFAS Detected
6
Above MCL
2
State
Washington
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 8.90ppt | 223% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 6.20ppt | 155% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFPeA Perfluoropentanoic acid | 110.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 48.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 14.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 6.70ppt | No federal limit | — | Unregulated |
SUMMIT WATER & SUPPLY CO
WA5385050 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Washington
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFPeA Perfluoropentanoic acid | 3.10ppt | No federal limit | — | Unregulated |
TACOMA WATER DIVISION CITY OF
WA5386800 Low LevelWater Type
Groundwater
PFAS Detected
2
Above MCL
0
State
Washington
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 5.10ppt | 51% of limit
| 10 ppt | Below limit |
PFBS Perfluorobutane sulfonic acid | 3.30ppt | No federal limit | — | Unregulated |
Note: ZIP code 98371 is served by 6 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.