ZIP Code 77449

Moderate

PFAS Detected

Above EPA Limits

Water Systems

37%

Highest % of MCL

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WESTON MUD

TX1010634 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	26800.00ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 61

TX1010721 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	15100.00ppt	No federal limit	—	Unregulated

WEST HARRIS COUNTY MUD 2 CHASE

TX1011029 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	38400.00ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 105

TX1011227 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	45500.00ppt	No federal limit	—	Unregulated
PFBA Perfluorobutanoic acid	5.80ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	4.10ppt	No federal limit	—	Unregulated
PFHxA Perfluorohexanoic acid	3.80ppt	No federal limit	—	Unregulated

LANGHAM CREEK UTILITY DISTRICT

TX1011249 Moderate

Water Type

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
PFHxS Perfluorohexane sulfonic acid	3.30ppt	33% of limit	10 ppt	Below limit
lithium	33100.00ppt	No federal limit	—	Unregulated
PFBA Perfluorobutanoic acid	9.10ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	7.40ppt	No federal limit	—	Unregulated
PFHxA Perfluorohexanoic acid	6.30ppt	No federal limit	—	Unregulated
PFBS Perfluorobutane sulfonic acid	3.70ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 157

TX1011430 Moderate

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
PFHxS Perfluorohexane sulfonic acid	3.70ppt	37% of limit	10 ppt	Below limit
lithium	20800.00ppt	No federal limit	—	Unregulated
PFHxA Perfluorohexanoic acid	9.90ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	8.20ppt	No federal limit	—	Unregulated
PFBS Perfluorobutane sulfonic acid	4.30ppt	No federal limit	—	Unregulated

FRY ROAD MUD

TX1011679 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	38000.00ppt	No federal limit	—	Unregulated

CLAY ROAD MUD

TX1011681 Low Level

Water Type

Surface Water

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	11100.00ppt	No federal limit	—	Unregulated
PFBA Perfluorobutanoic acid	7.70ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	4.60ppt	No federal limit	—	Unregulated
PFHxA Perfluorohexanoic acid	4.30ppt	No federal limit	—	Unregulated

MAYDE CREEK MUD

TX1011689 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
PFBA Perfluorobutanoic acid	5.10ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	4.60ppt	No federal limit	—	Unregulated
PFHxA Perfluorohexanoic acid	4.00ppt	No federal limit	—	Unregulated

WESTERN PINES MHP

TX1011714 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	10200.00ppt	No federal limit	—	Unregulated
PFBA Perfluorobutanoic acid	5.60ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 71

TX1011823 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	50200.00ppt	No federal limit	—	Unregulated

NORTHWEST HARRIS COUNTY MUD 12

TX1011901 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	16000.00ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	5.00ppt	No federal limit	—	Unregulated
PFHxA Perfluorohexanoic acid	3.60ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 165

TX1012187 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	28400.00ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	4.70ppt	No federal limit	—	Unregulated
PFHxA Perfluorohexanoic acid	4.10ppt	No federal limit	—	Unregulated

RICEWOOD MUD

TX1012227 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	12200.00ppt	No federal limit	—	Unregulated

WEST HARRIS COUNTY MUD 7

TX1012228 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	11700.00ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 127

TX1012229 Low Level

Water Type

Surface Water

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	9250.00ppt	No federal limit	—	Unregulated
PFBA Perfluorobutanoic acid	5.90ppt	No federal limit	—	Unregulated
PFPeA Perfluoropentanoic acid	3.30ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 239

TX1012392 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	30300.00ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 167

TX1012842 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	24500.00ppt	No federal limit	—	Unregulated

HARRIS COUNTY MUD 287

TX1013385 Low Level

Water Type

Groundwater

PFAS Detected

Above MCL

State

Texas

Data Period

2023–2025

PFAS Test Results

Compound	Detected	vs. EPA Limit	EPA Limit	Status
lithium	43000.00ppt	No federal limit	—	Unregulated

Note: ZIP code 77449 is served by 19 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 →

Recommended Filtration

Activated Carbon Pitcher or Under-Sink Filter

Effective for the lower PFAS levels detected in your water.

Look for:NSF/ANSI 53 certified for PFAS reduction

Top brands:Clearly Filtered, ZeroWater

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Filter links may be affiliate links — we earn a small commission at no extra cost to you. Always verify NSF certification before purchasing.

About PFAS MCLs

● PFOA & PFOS limits: 4 ppt
● PFNA, PFHxS, GenX limits: 10 ppt
● "ppt" = parts per trillion = nanograms per liter
● EPA set these limits in April 2024 — the first-ever enforceable PFAS standards

Full PFAS guide →

Get Your Water Tested

UCMR 5 tests water at the utility entry point. Aging pipes can add contamination. For the most accurate assessment of your tap water, get a certified lab test.

Find certified labs →

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