CheckPFAS

ZIP Code 98374

High Risk
High Risk PFAS Risk Level

PFAS above EPA limits detected

4 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.

16
PFAS Detected
4
Above EPA Limits
5
Water Systems
223%
Highest % of MCL

Compounds Exceeding EPA Limits

PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 215% of limit
Detected: 8.60 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 110% of limit
Detected: 4.40 ppt

What this means for you

One or more PFAS compounds were measured above the EPA's enforceable drinking water limit at a utility serving ZIP 98374. The EPA set these limits because long-term exposure at higher concentrations is associated with health effects including immune suppression, thyroid changes, and cancer risk increases. Standard pitcher filters (Brita, PUR) are not certified to remove PFAS. The most reliable at-home options are under-sink reverse osmosis systems or activated carbon block filters with an NSF/ANSI 58 certification specifically listing PFOA/PFOS reduction. Your water utility is required to bring levels into compliance by 2029 — filtering at the tap is the practical interim step if you'd like additional protection now.

FIRGROVE MUTUAL INC

WA5325200 High Risk
Water Type
Groundwater
PFAS Detected
3
Above MCL
2
State
Washington
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOS
Perfluorooctane sulfonic acid
8.60ppt
215% of limit
4 ppt⚠ Exceeds MCL
PFOA
Perfluorooctanoic acid
4.40ppt
110% of limit
4 ppt⚠ Exceeds MCL
PFBS
Perfluorobutane sulfonic acid
5.40pptNo federal limitUnregulated

FRUITLAND MUTUAL WATER COMPANY

WA5326800 Low Level
Water Type
Groundwater
PFAS Detected
4
Above MCL
0
State
Washington
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOA
Perfluorooctanoic acid
4.00ppt
100% of limit
4 pptBelow limit
PFBS
Perfluorobutane sulfonic acid
5.10pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
3.40pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
3.40pptNo federal limitUnregulated

PUYALLUP CITY OF

WA5370050 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Washington
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFBS
Perfluorobutane sulfonic acid
4.40pptNo federal limitUnregulated

SOUTHWOOD WATER SYSTEM

WA5382844 High Risk
Water Type
Groundwater
PFAS Detected
6
Above MCL
2
State
Washington
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
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
110.00pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
48.00pptNo federal limitUnregulated
PFBA
Perfluorobutanoic acid
14.00pptNo federal limitUnregulated
PFBS
Perfluorobutane sulfonic acid
6.70pptNo federal limitUnregulated

TACOMA WATER DIVISION CITY OF

WA5386800 Low Level
Water Type
Groundwater
PFAS Detected
2
Above MCL
0
State
Washington
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFHxS
Perfluorohexane sulfonic acid
5.10ppt
51% of limit
10 pptBelow limit
PFBS
Perfluorobutane sulfonic acid
3.30pptNo federal limitUnregulated
Note: ZIP code 98374 is served by 5 separate water utilities. Results above show data for each system independently.
About this data
Source
EPA UCMR 5 (Unregulated Contaminant Monitoring Rule, 5th cycle)
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems serving > 25 people
Water systems (PWSID)
WA5325200, WA5326800, WA5370050, WA5382844, WA5386800
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor, not zero

Values shown are the highest single-sample concentration measured at entry points to the distribution system. Results reflect water quality at the treatment plant — aging pipes, building plumbing, and on-site storage can affect what actually reaches your tap.