CheckPFAS

ZIP Code 77346

Moderate
Moderate PFAS Risk Level
18
PFAS Detected
0
Above EPA Limits
11
Water Systems
N/A
Highest % of MCL
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CITY OF HOUSTON, TX

TX1010013 Moderate
Water Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
33900.00pptNo federal limit—Unregulated
6:2 FTS
6:2 Fluorotelomer sulfonic acid
42.60pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
10.60pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
6.70pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
5.10pptNo federal limit—Unregulated

HARRIS COUNTY MUD 132

TX1010616 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
15100.00pptNo federal limit—Unregulated

TRAIL OF THE LAKES MUD

TX1010617 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
25100.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 152

TX1010902 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
15900.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 46

TX1010903 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
15800.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 151

TX1010905 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
11800.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 153

TX1012133 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
15600.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 278

TX1012835 Low Level
Water Type
Surface Water
PFAS Detected
4
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
21000.00pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
6.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
5.80pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
4.20pptNo federal limit—Unregulated

HARRIS COUNTY MUD 106

TX1013160 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
16800.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 290

TX1013294 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
16000.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 400 - WEST

TX1013310 Low Level
Water Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
19900.00pptNo federal limit—Unregulated
Note: ZIP code 77346 is served by 11 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.

View raw EPA data →