PlainWater
States → Montana

FAIRFIELD TOWN OF

PWS ID: MT0000212 · FAIRFIELD, Montana 59436

PFAS Detected

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

Population Served
718
Total Violations
368
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
371
County
Teton
School/Daycare
No
MCL Violations
0
Monitoring Violations
364
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 27 2005
Nitrate-Nitrite MR 25 2019
Di(2-ethylhexyl) adipate MR 8 2017
Benzo(a)pyrene MR 8 2017
Simazine MR 8 2017
OXAMYL MR 8 2017
Heptachlor epoxide MR 8 2017
Heptachlor MR 8 2017
Carbofuran MR 8 2017
LASSO MR 8 2017
BHC-GAMMA MR 8 2017
Methoxychlor MR 8 2017
Endrin MR 8 2017
Atrazine MR 8 2017
Gross Alpha, Excl. Radon and U MR 8 2017
Combined Radium (-226 and -228) MR 8 2017
Toxaphene MR 8 2017
Chlordane MR 8 2017
Dalapon MR 7 2017
Di(2-ethylhexyl) phthalate MR 7 2017
2,4-D MR 7 2017
2,4,5-TP MR 7 2017
HEXACHLOROBENZENE MR 7 2017
Pentachlorophenol MR 7 2017
Picloram MR 7 2017
Dinoseb MR 7 2017
Hexachlorocyclopentadiene MR 7 2017
Coliform (TCR) MR 5 2008
Aldicarb sulfoxide MR 4 2011
Aldicarb MR 4 2011

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 10 of 300 samples detected PFAS.

Contaminant Date Result MRL Status
4:2 FTS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
9Cl-PF3ONS 8/18/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
lithium 8/18/2025 24.5000 µg/L 9 µg/L Detected
PFTrDA 8/18/2025 <0.007 µg/L 0.007 µg/L Not Detected
NFDHA 8/18/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFBA 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/18/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 8/18/2025 <0.008 µg/L 0.008 µg/L Not Detected
HFPO-DA 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
NMeFOSAA 8/18/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFNA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/18/2025 <0.02 µg/L 0.02 µg/L Not Detected
11Cl-PF3OUdS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
lithium 8/18/2025 15.2000 µg/L 9 µg/L Detected
PFHpA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 8/18/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 8/18/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFDA 8/18/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/18/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHxA 8/18/2025 <0.003 µg/L 0.003 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.