CheckPFAS

ZIP 77066 · Texas

Houston, TX

Low Level
See the full Houston overview — all utilities & ZIP codes →

6 compounds detected

Trace detections — well below EPA limits

lithium no federal limit
22200.00 ppt
0 33300 ppt
6:2 FTS no federal limit
104.00 ppt
0 156 ppt
PFBA no federal limit
8.60 ppt
0 12.9 ppt
PFPeA no federal limit
6.90 ppt
0 10.4 ppt
PFHxA no federal limit
5.50 ppt
0 8.3 ppt
PFBS no federal limit
4.60 ppt
0 6.9 ppt
Above EPA limit Below EPA limit No federal limit EPA MCL
PFAS Detected
19
Above EPA Limits
0
Water Systems
10
Highest % of MCL
N/A

Plain English

01What this means for you

Very low PFAS concentrations were detected — well below the EPA's Maximum Contaminant Level. For most healthy adults, this represents a minimal incremental risk from drinking water. The most proportionate response is to note the result and check your utility's Consumer Confidence Report again next year. If you have specific health concerns or vulnerable household members, speaking with your doctor and optionally installing a certified point-of-use filter is a reasonable step.

How to read your annual CCR → PFAS health background →

02FALLBROOK UTILITY DISTRICT

Low Level

PWSID · TX1010340

Water Type
Groundwater
PFAS Detected
2
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
22200.00pptNo federal limit—Unregulated
6:2 FTS
6:2 Fluorotelomer sulfonic acid
104.00pptNo federal limit—Unregulated

03HARRIS COUNTY WCID 109

Low Level

PWSID · TX1010359

Water Type
Surface Water
PFAS Detected
2
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
15600.00pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
8.60pptNo federal limit—Unregulated

04FOUNTAINHEAD MUD

Low Level

PWSID · TX1010435

Water Type
Surface Water
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFBA
Perfluorobutanoic acid
8.20pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
4.10pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
3.60pptNo federal limit—Unregulated

05HARRIS COUNTY MUD 109

Low Level

PWSID · TX1010620

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
11300.00pptNo federal limit—Unregulated

06HARRIS COUNTY MUD 148 KINGSLAKE

Low Level

PWSID · TX1010938

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFBA
Perfluorobutanoic acid
8.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
6.70pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
5.00pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
4.60pptNo federal limit—Unregulated

07HARRIS COUNTY MUD 33

Low Level

PWSID · TX1011162

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
18500.00pptNo federal limit—Unregulated

08HARRIS COUNTY MUD 150

Low Level

PWSID · TX1011250

Water Type
Surface Water
PFAS Detected
3
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFPeA
Perfluoropentanoic acid
6.90pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
6.60pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
5.50pptNo federal limit—Unregulated

09CY CHAMP PUD

Low Level

PWSID · TX1011522

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFBA
Perfluorobutanoic acid
6.30pptNo federal limit—Unregulated

010HARRIS COUNTY MUD 180

Low Level

PWSID · TX1011799

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
15400.00pptNo federal limit—Unregulated

011CITY OF HOUSTON WILLOW CHASE

Low Level

PWSID · TX1011902

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
14000.00pptNo federal limit—Unregulated

Note: ZIP code 77066 is served by 10 separate water utilities. Results above show data for each system independently.

Source & Methodology

About this data

Source
EPA UCMR 5
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems
Water systems (PWSID)
TX1010340 · TX1010359 · TX1010435 · TX1010620 · TX1010938 · TX1011162 · TX1011250 · TX1011522 · TX1011799 · TX1011902
Detection threshold (MRL)
~1.5–2 ppt

Values shown are the highest single-sample concentration measured at entry points to the distribution system. Results reflect water quality at the treatment plant — aging pipes, building plumbing, and on-site storage can affect what actually reaches your tap. "Not detected" means below the MRL, not literally zero.

View raw EPA UCMR 5 occurrence data →

Related

More resources for your area

  1. 01

    How to read your utility's CCR

    Decode your annual Consumer Confidence Report

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  2. 02

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  3. 03

    All water systems in Texas

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  4. 04

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    Compare every method by removal rate & NSF certification

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  5. 05

    PFAS health effects

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  6. 06

    PFAS compound guide

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    →