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States → Virginia

HERNDON, TOWN OF

PWS ID: VA6059550 · HERNDON, Virginia 20170

PFAS Detected

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

Population Served
24,601
Total Violations
6
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
5,595
County
Fairfax
School/Daycare
No
MCL Violations
4
Monitoring Violations
0
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 4 2007

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
NMeFOSAA 8/9/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFNA 8/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 8/9/2023 0.0031 µg/L 0.003 µg/L Detected
PFDoA 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/9/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFUnA 8/9/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFTrDA 8/9/2023 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 8/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
lithium 8/9/2023 <9 µg/L 9 µg/L Not Detected
11Cl-PF3OUdS 8/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 8/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 8/9/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFEESA 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/9/2023 0.0039 µg/L 0.003 µg/L Detected
PFMPA 8/9/2023 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 8/9/2023 <0.002 µg/L 0.002 µg/L Not Detected
4:2 FTS 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/9/2023 0.0068 µg/L 0.005 µg/L Detected
HFPO-DA 8/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/9/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/9/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 5/16/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/16/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFPeA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
lithium 5/16/2023 <9 µg/L 9 µg/L Not Detected
PFHpS 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 5/16/2023 <0.02 µg/L 0.02 µg/L Not Detected
PFBS 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/16/2023 0.0056 µg/L 0.005 µg/L Detected
HFPO-DA 5/16/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 5/16/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 5/16/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 5/16/2023 <0.006 µg/L 0.006 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.