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States → Texas

CITY OF SAN JUAN

PWS ID: TX1080010 · SAN JUAN, Texas 78589-2822

PFAS Detected

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

Population Served
30,000
Total Violations
36
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
7,317
County
Hidalgo
School/Daycare
No
MCL Violations
4
Monitoring Violations
21
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 6 2016
Lead and Copper Rule MR 5 2016
Chlorite MR 5 2017
TTHM MCL 4 1996
Coliform (TCR) MR 4 2012
Public Notice Other 4 2017
CARBON, TOTAL MR 1 2015

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 35 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
NFDHA 8/27/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/27/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 8/27/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 8/27/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFMBA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/27/2025 0.0056 µg/L 0.003 µg/L Detected
PFMPA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/27/2025 0.0061 µg/L 0.005 µg/L Detected
HFPO-DA 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHxS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/27/2025 44.2000 µg/L 9 µg/L Detected
PFHpA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFUnA 8/27/2025 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 8/27/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 8/27/2025 0.0051 µg/L 0.003 µg/L Detected
PFDoA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/27/2025 43.4000 µg/L 9 µg/L Detected
HFPO-DA 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/27/2025 0.0059 µg/L 0.005 µg/L Detected
6:2 FTS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/27/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/27/2025 0.0057 µg/L 0.003 µg/L Detected
NFDHA 8/27/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFHpS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/27/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/27/2025 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 8/27/2025 <0.006 µg/L 0.006 µg/L Not Detected
NEtFOSAA 8/27/2025 <0.005 µg/L 0.005 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.