CheckPFAS

ZIP Code 77433

Moderate
Moderate PFAS Risk Level
21
PFAS Detected
0
Above EPA Limits
9
Water Systems
37%
Highest % of MCL
Find the right filter for your water
See our tested & reviewed PFAS-certified filters →

HARRIS COUNTY MUD 157

TX1011430 Moderate
Water Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFHxS
Perfluorohexane sulfonic acid
3.70ppt
37% of limit
10 pptBelow limit
lithium
20800.00pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
9.90pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
8.20pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
4.30pptNo federal limit—Unregulated

HARRIS COUNTY MUD 165

TX1012187 Low Level
Water Type
Groundwater
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
28400.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
4.70pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
4.10pptNo federal limit—Unregulated

CYPRESS HILL MUD 1

TX1012378 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
41600.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 322 FAIRFIELD VILLAGE

TX1012542 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
36300.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 354

TX1012965 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
25800.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 172

TX1012970 Low Level
Water Type
MX
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
15200.00pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
5.50pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
3.40pptNo federal limit—Unregulated

HARRIS COUNTY MUD 397

TX1013295 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
21200.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 419

TX1013335 Low Level
Water Type
Groundwater
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFBA
Perfluorobutanoic acid
6.10pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
4.40pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
4.10pptNo federal limit—Unregulated

HARRIS COUNTY MUD 374 CYPRESS CREEK LAKE

TX1013450 Low Level
Water Type
Groundwater
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFBA
Perfluorobutanoic acid
6.00pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
4.60pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
4.30pptNo federal limit—Unregulated
Note: ZIP code 77433 is served by 9 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 →