PlainWater
States → Navajo Nation

Farmington Rural-Shiprock-Beclabito NTUA

PWS ID: NN3500245 · Ft Defiance, Navajo Nation 86504

PFAS Detected

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

Population Served
15,233
Total Violations
154
Health-Based Violations
17
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
4,454
School/Daycare
No
MCL Violations
13
Monitoring Violations
41
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 13 2009
Revised Total Coliform Rule MON 13 2024
Coliform (TCR) MR 11 2012
TTHM MR 7 2018
Total Haloacetic Acids (HAA5) MR 7 2018
Revised Total Coliform Rule TT 4 2018
Public Notice Other 3 2024
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 2 2013
Lead and Copper Rule MR 1 2004

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFDA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 8/20/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFDoA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/20/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/20/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 8/20/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFTrDA 8/20/2024 <0.007 µg/L 0.007 µg/L Not Detected
lithium 8/20/2024 40.6000 µg/L 9 µg/L Detected
ADONA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 8/20/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 8/20/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 8/20/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/20/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFTA 5/28/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFMPA 5/28/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/28/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 5/28/2024 <0.004 µg/L 0.004 µg/L Not Detected
4:2 FTS 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/28/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 5/28/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/28/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/28/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 5/28/2024 45.6000 µg/L 9 µg/L Detected
PFOA 5/28/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/28/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/28/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 5/28/2024 <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.