CheckPFAS

ZIP Code 77064

Moderate
Moderate PFAS Risk Level
19
PFAS Detected
0
Above EPA Limits
9
Water Systems
36%
Highest % of MCL

What 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.

CITY OF HOUSTON, TX

TX1010013 Moderate
Water Type
Groundwater
PFAS Detected
5
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
lithium
33900.00pptNo federal limitUnregulated
6:2 FTS
6:2 Fluorotelomer sulfonic acid
42.60pptNo federal limitUnregulated
PFBA
Perfluorobutanoic acid
10.60pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
6.70pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
5.10pptNo federal limitUnregulated

HARRIS COUNTY MUD 6 CARRIAGE LANE

TX1010496 Moderate
Water Type
Surface Water
PFAS Detected
6
Above MCL
0
State
Texas
Data Period
2023–2025

PFAS Test Results

CompoundDetectedvs. EPA LimitEPA LimitStatus
PFHxS
Perfluorohexane sulfonic acid
3.60ppt
36% of limit
10 pptBelow limit
lithium
27000.00pptNo federal limitUnregulated
PFBA
Perfluorobutanoic acid
10.50pptNo federal limitUnregulated
PFPeA
Perfluoropentanoic acid
8.10pptNo federal limitUnregulated
PFHxA
Perfluorohexanoic acid
7.40pptNo federal limitUnregulated
PFBS
Perfluorobutane sulfonic acid
3.70pptNo federal limitUnregulated

EMERALD FOREST UTILITY DISTRICT

TX1010541 Low Level
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 limitUnregulated
PFHxA
Perfluorohexanoic acid
3.00pptNo federal limitUnregulated

REID ROAD MUD 1

TX1010872 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
35100.00pptNo federal limitUnregulated

WEST HARRIS COUNTY MUD 9

TX1011798 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
14100.00pptNo federal limitUnregulated

CITY OF HOUSTON WILLOW CHASE

TX1011902 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
14000.00pptNo federal limitUnregulated

REID ROAD MUD 2

TX1011928 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
14000.00pptNo federal limitUnregulated

WEST HARRIS COUNTY MUD 10

TX1012068 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
37200.00pptNo federal limitUnregulated

WEST HARRIS COUNTY MUD 11

TX1012858 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
35900.00pptNo federal limitUnregulated
Note: ZIP code 77064 is served by 9 separate water utilities. Results above show data for each system independently.
About this data
Source
EPA UCMR 5 (Unregulated Contaminant Monitoring Rule, 5th cycle)
Data released
January 2026
Sampling period
January 2023 – December 2025
Systems tested
~10,000 public water systems serving > 25 people
Water systems (PWSID)
TX1010013, TX1010496, TX1010541, TX1010872, TX1011798, TX1011902, TX1011928, TX1012068, TX1012858
Detection threshold (MRL)
~1.5–2 ppt — "Not detected" means below this floor, not zero

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.