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HARRIS COUNTY WCID 36

PWS ID: TX1010239 · HOUSTON, Texas 77015-4649

PFAS Detected

6 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
11,073
Total Violations
8
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
3,691
County
Harris
School/Daycare
No
MCL Violations
4
Monitoring Violations
4
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 4 2011
E. COLI MR 4 2012

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 18 of 360 samples detected PFAS.

Contaminant Date Result MRL Status
PFPeA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 7/18/2024 11.0000 µg/L 9 µg/L Detected
NMeFOSAA 7/18/2024 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 7/18/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 7/18/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFDoA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 7/18/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFMBA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 7/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFMPA 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 7/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 7/18/2024 0.0036 µg/L 0.003 µg/L Detected
PFUnA 7/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 7/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 7/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
ADONA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 7/18/2024 0.0039 µg/L 0.003 µg/L Detected
lithium 7/18/2024 <9 µg/L 9 µg/L Not Detected
PFEESA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 7/18/2024 0.0040 µg/L 0.004 µg/L Detected
PFHpA 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 7/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 7/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.