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Transient Non-Community Water System · PWS MT0000993

A Bar

Bigfork, Montana 59911 - drinking water served from groundwater sources to 77 people, tracked in EPA SDWIS and UCMR5.

77
People served
179
EPA violations
27
Health-based
Untested
UCMR5 result

The verdict

EPA records 179 drinking-water violations at A Bar, 15% of them health-based - above the Montana per-system average.

179
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
77
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: A Bar

A Bar is a private-owned transient non-community water system that delivers drinking water to 77 residents in Bigfork, Montana (Lake County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 179 total violations for this system , of which 27 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 146 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 Coliform (TCR), recorded in 100 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

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%).

A Bar's 179 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
77
Total Violations
179
Health-Based Violations
27
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
2
County
Lake
School/Daycare
No
MCL Violations
24
Monitoring Violations
146
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 100 2016
Revised Total Coliform Rule MON 33 2020
Coliform (TCR) MCL 24 2008
Nitrate-Nitrite MR 6 2012
E. COLI MR 6 2017
Revised Total Coliform Rule TT 3 2017
Revised Total Coliform Rule Other 3 2016
Nitrate MR 1 1993

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 A Bar.

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 MT0000993 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 33 SDWIS / MT0000993 / 8000
2017 E. COLI MR 6 SDWIS / MT0000993 / 3014
2017 Revised Total Coliform Rule TT 3 SDWIS / MT0000993 / 8000
2016 Coliform (TCR) MR 100 SDWIS / MT0000993 / 3100
2016 Revised Total Coliform Rule Other 3 SDWIS / MT0000993 / 8000
2012 Nitrate-Nitrite MR 6 SDWIS / MT0000993 / 1038
2008 Coliform (TCR) MCL 24 SDWIS / MT0000993 / 3100
1993 Nitrate MR 1 SDWIS / MT0000993 / 1040

How A Bar Compares

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

Metric A Bar Montana avg Federal benchmark
Total violations 179 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 27 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 77 492 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 A Bar water safe to drink? ▼
A Bar (PWS ID: MT0000993) has 179 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 77 people using Groundwater sources.
How many people does A Bar serve? ▼
A Bar serves 77 people in Bigfork, Montana. It is a Private-owned system using Groundwater water sources with 2 service connections.
What type of violations does A Bar have? ▼
A Bar has 179 total violations: 27 health-based violations (MCL exceedances or treatment failures), 146 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in A Bar water? ▼
No PFAS testing data is available for A Bar under the EPA's UCMR5 monitoring program.
What water source does A Bar use? ▼
A Bar uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

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.