PlainWater

Community Water System · PWS MT0000212

Fairfield Town Of

Fairfield, Montana 59436 - drinking water served from groundwater sources to 718 people, tracked in EPA SDWIS and UCMR5.

718
People served
368
EPA violations
0
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 368 drinking-water violations at Fairfield Town Of - above the Montana per-system average.

368
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
718
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Fairfield Town Of

Fairfield Town Of is a local-owned community water system that delivers drinking water to 718 residents in Fairfield, Montana (Teton County) through 371 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 368 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 364 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 27 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Montana, EPA tracks 2,263 public water systems serving 1,112,267 people, with 297,270 cumulative violations and 25,922 health-based violations on record. About 95% of systems in the state carry at least one violation, and state-wide the average per system is 131.4 violations. Statewide, 28 of 45 UCMR5-tested systems have reported PFAS detections (62.2%).

Fairfield Town Of's 368 violations sit above the Montana average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

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. 0 of 290 samples detected PFAS.

Contaminant Date Result MRL Status
4:2 FTS 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFPeA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
PFPeS 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
9Cl-PF3ONS 8/18/2025 <2.00 ppt 2.00 ppt Not Detected
PFHpS 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/18/2025 <7.00 ppt 7.00 ppt Not Detected
NFDHA 8/18/2025 <20.00 ppt 20.00 ppt Not Detected
PFBA 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
NEtFOSAA 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
ADONA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
PFUnA 8/18/2025 <2.00 ppt 2.00 ppt Not Detected
PFHxA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFDoA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFNA 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFBS 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/18/2025 <8.00 ppt 8.00 ppt Not Detected
HFPO-DA 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
PFOS 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
NMeFOSAA 8/18/2025 <6.00 ppt 6.00 ppt Not Detected
PFNA 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFPeA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFMBA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFEESA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/18/2025 <20.00 ppt 20.00 ppt Not Detected
11Cl-PF3OUdS 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
PFHpS 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFMPA 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFHxS 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFPeS 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFHpA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
NEtFOSAA 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
PFUnA 8/18/2025 <2.00 ppt 2.00 ppt Not Detected
PFBS 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/18/2025 <5.00 ppt 5.00 ppt Not Detected
PFDA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFOA 8/18/2025 <4.00 ppt 4.00 ppt Not Detected
PFHxA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected
PFTrDA 8/18/2025 <7.00 ppt 7.00 ppt Not Detected
PFDoA 8/18/2025 <3.00 ppt 3.00 ppt Not Detected

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Fairfield Town Of.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID MT0000212 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Montana Drinking Water Authority

Montana's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find MT regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2020 Revised Total Coliform Rule MON 4 SDWIS / MT0000212 / 8000
2019 Nitrate-Nitrite MR 25 SDWIS / MT0000212 / 1038
2017 Di(2-ethylhexyl) adipate MR 8 SDWIS / MT0000212 / 2035
2017 Benzo(a)pyrene MR 8 SDWIS / MT0000212 / 2306
2017 Simazine MR 8 SDWIS / MT0000212 / 2037
2017 OXAMYL MR 8 SDWIS / MT0000212 / 2036
2017 Heptachlor epoxide MR 8 SDWIS / MT0000212 / 2067
2017 Heptachlor MR 8 SDWIS / MT0000212 / 2065
2017 Carbofuran MR 8 SDWIS / MT0000212 / 2046
2017 LASSO MR 8 SDWIS / MT0000212 / 2051
2017 BHC-GAMMA MR 8 SDWIS / MT0000212 / 2010
2017 Methoxychlor MR 8 SDWIS / MT0000212 / 2015
2017 Endrin MR 8 SDWIS / MT0000212 / 2005
2017 Atrazine MR 8 SDWIS / MT0000212 / 2050
2017 Gross Alpha, Excl. Radon and U MR 8 SDWIS / MT0000212 / 4000

How Fairfield Town Of Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Fairfield Town Of Montana avg Federal benchmark
Total violations 368 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 11.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 62.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 718 492 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 2,263 regulated public water systems in Montana.

Federal MCL reference, Safe Drinking Water Act thresholds
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Fairfield Town Of water safe to drink?
Fairfield Town Of (PWS ID: MT0000212) has 368 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 718 people using Groundwater sources.
How many people does Fairfield Town Of serve?
Fairfield Town Of serves 718 people in Fairfield, Montana. It is a Local-owned system using Groundwater water sources with 371 service connections.
What type of violations does Fairfield Town Of have?
Fairfield Town Of has 368 total violations: 0 health-based violations (MCL exceedances or treatment failures), 364 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Fairfield Town Of water?
No. Fairfield Town Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Fairfield Town Of use?
Fairfield Town Of uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from?
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
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.
Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.