CheckPFAS

ZIP Code 77450

High Risk
High Risk PFAS Risk Level

PFAS above EPA limits detected

1 compound exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.

25
PFAS Detected
1
Above EPA Limits
13
Water Systems
105%
Highest % of MCL

Compounds Exceeding EPA Limits

PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 105% of limit
Detected: 4.20 ppt
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CINCO MUD 2

TX0790306 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

CINCO MUD 8

TX0790324 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
28500.00pptNo federal limit—Unregulated

CINCO MUD 7

TX0790343 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
32600.00pptNo federal limit—Unregulated

FORT BEND COUNTY MUD 142

TX0790429 High Risk
Water Type
Surface Water
PFAS Detected
8
Above MCL
1
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFOS
Perfluorooctane sulfonic acid
4.20ppt
105% of limit
4 ppt⚠ Exceeds MCL
PFHxS
Perfluorohexane sulfonic acid
3.80ppt
38% of limit
10 pptBelow limit
lithium
12200.00pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
9.10pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
8.80pptNo federal limit—Unregulated
6:2 FTS
6:2 Fluorotelomer sulfonic acid
7.90pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
7.60pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
4.00pptNo federal limit—Unregulated

MASON CREEK UTILITY DISTRICT

TX1010379 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
36000.00pptNo federal limit—Unregulated

WEST MEMORIAL MUD

TX1010540 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
22100.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 81

TX1010581 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
31900.00pptNo federal limit—Unregulated

HARRIS COUNTY MUD 61

TX1010721 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

MEMORIAL MUD

TX1011242 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
29000.00pptNo federal limit—Unregulated

CIMARRON MUD

TX1011410 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
20600.00pptNo federal limit—Unregulated

CORNERSTONES MUD

TX1011692 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
20300.00pptNo federal limit—Unregulated

INTERSTATE MUD

TX1012264 Moderate
Water Type
Groundwater
PFAS Detected
6
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFHxS
Perfluorohexane sulfonic acid
3.10ppt
31% of limit
10 pptBelow limit
lithium
26700.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
6.30pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
5.60pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
5.60pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
3.30pptNo federal limit—Unregulated

NOTTINGHAM COUNTRY MUD

TX1012315 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
26700.00pptNo federal limit—Unregulated
Note: ZIP code 77450 is served by 13 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 →