CheckPFAS

ZIP Code 77377

Low Level
Low Level PFAS Risk Level
10
PFAS Detected
0
Above EPA Limits
4
Water Systems
N/A
Highest % of MCL

MALCOMSON ROAD UTILITY DISTRICT

TX1010495 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
23700.00pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
6.20pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
4.10pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
3.50pptNo federal limit—Unregulated

NORTHWEST HARRIS COUNTY MUD 5

TX1010884 Low Level
Water Type
MX
PFAS Detected
4
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
87400.00pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
19.20pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
11.90pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
6.00pptNo federal limit—Unregulated

NORTHWEST HARRIS COUNTY MUD 15

TX1011600 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
41700.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 281

TX1013178 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
66200.00pptNo federal limit—Unregulated
Note: ZIP code 77377 is served by 4 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 →