CheckPFAS

ZIP 77070 · Texas

Houston, TX

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

5 compounds detected

Detected — below EPA limits

lithium no federal limit
67500.00 ppt
0 101250 ppt
PFPeA no federal limit
15.00 ppt
0 22.5 ppt
PFHxA no federal limit
8.70 ppt
0 13.1 ppt
PFBA no federal limit
6.20 ppt
0 9.3 ppt
PFBS no federal limit
4.30 ppt
0 6.5 ppt
Above EPA limit Below EPA limit No federal limit EPA MCL
PFAS Detected
34
Above EPA Limits
0
Water Systems
12
Highest % of MCL
N/A

Plain English

01What this means for you

PFAS were detected at this water system, but below the EPA's Maximum Contaminant Level. "Below the limit" doesn't mean no risk — it means EPA considers the concentration acceptable across a lifetime of consumption at that level. Some people, particularly pregnant women, infants, and those with compromised immune systems, may wish to take additional precaution. Using a filter certified NSF/ANSI 58 for PFOA/PFOS reduction is a reasonable step that costs little and eliminates this variable entirely. Continue reading your utility's annual Consumer Confidence Report for year-to-year trends.

NSF-certified filter options → How to read your CCR →

What to do next

02Three concrete steps

  1. 01

    Install a certified filter

    A reverse osmosis or NSF/ANSI 58-certified carbon block at your kitchen tap is the most reliable solution. Standard pitcher filters (Brita, PUR) don't remove PFAS unless explicitly certified for it. See certified filter picks →

  2. 02

    Read your utility's CCR

    Your water utility publishes an annual Consumer Confidence Report covering the previous year's water quality, including their PFAS treatment plan if any. More detailed than this site's summary. How to read a CCR →

  3. 03

    Reduce other exposure routes

    Water isn't the only input. Replace badly-scratched non-stick pans, skip microwave popcorn bags and greaseproof fast-food wrappers, and choose stainless or cast iron cookware. Full action plan on the FAQ →

Filter Recommendations

Find the right filter for your water
See our tested & reviewed PFAS-certified filters, ranked by CheckPFAS Score

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02PRESTONWOOD FOREST UTILITY DISTRICT

Low Level

PWSID · TX1010467

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
28900.00pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
5.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
3.90pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
3.30pptNo federal limit—Unregulated

03LAKE FOREST UTILITY DISTRICT

Low Level

PWSID · TX1010494

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFPeA
Perfluoropentanoic acid
5.30pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
5.20pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
3.70pptNo federal limit—Unregulated

04MALCOMSON ROAD UTILITY DISTRICT

Low Level

PWSID · TX1010495

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

05HARRIS COUNTY WCID 119

Moderate

PWSID · TX1010509

Water Type
Surface Water
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
67500.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
12.60pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
8.70pptNo federal limit—Unregulated
PFBA
Perfluorobutanoic acid
5.40pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
4.30pptNo federal limit—Unregulated

06HARRIS COUNTY MUD 18 HEATHERWOOD HUNTERS

Low Level

PWSID · TX1010512

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
29200.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
6.00pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
4.00pptNo federal limit—Unregulated

07EMERALD FOREST UTILITY DISTRICT

Low Level

PWSID · TX1010541

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFPeA
Perfluoropentanoic acid
4.00pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
3.00pptNo federal limit—Unregulated

08CHARTERWOOD MUD

Low Level

PWSID · TX1010632

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
6.20pptNo federal limit—Unregulated

09CYPRESS FOREST PUD

Low Level

PWSID · TX1010919

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
5.20pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
5.10pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
3.80pptNo federal limit—Unregulated

010MILLS ROAD MUD

Low Level

PWSID · TX1011107

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
37800.00pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
3.70pptNo 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

012HARRIS COUNTY MUD 230

Low Level

PWSID · TX1012740

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

PFAS test results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFPeA
Perfluoropentanoic acid
15.00pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
8.50pptNo federal limit—Unregulated
PFBS
Perfluorobutane sulfonic acid
4.30pptNo federal limit—Unregulated

013HARRIS COUNTY MUD 468

Low Level

PWSID · TX1013369

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
5.80pptNo federal limit—Unregulated
PFPeA
Perfluoropentanoic acid
4.60pptNo federal limit—Unregulated
PFHxA
Perfluorohexanoic acid
3.60pptNo federal limit—Unregulated

Note: ZIP code 77070 is served by 12 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)
TX1010467 · TX1010494 · TX1010495 · TX1010509 · TX1010512 · TX1010541 · TX1010632 · TX1010919 · TX1011107 · TX1011902 · TX1012740 · TX1013369
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

    →
  2. 02

    On a private well?

    PFAS testing guide for well owners — EPA rules don't apply

    →
  3. 03

    All water systems in Texas

    Compare utilities statewide

    →
  4. 04

    Which filter removes PFAS?

    Compare every method by removal rate & NSF certification

    →
  5. 05

    PFAS health effects

    What the science shows, condition by condition

    →
  6. 06

    PFAS compound guide

    Health effects & EPA limits for each compound

    →