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Community Water System · PWS MT0000258

Judith Gap Town Of

Judith Gap, Montana 59453 - drinking water served from groundwater sources to 126 people, tracked in EPA SDWIS and UCMR5.

126
People served
64
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 64 drinking-water violations at Judith Gap Town Of, 6% of them health-based - below the Montana per-system average.

64
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
126
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Judith Gap Town Of

Judith Gap Town Of is a local-owned community water system that delivers drinking water to 126 residents in Judith Gap, Montana (Wheatland County) through 79 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 64 total violations for this system , of which 4 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 52 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 15 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%).

Judith Gap Town Of's 64 violations sit below 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
126
Total Violations
64
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
79
County
Wheatland
School/Daycare
No
MCL Violations
4
Monitoring Violations
52
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 15 2020
Consumer Confidence Rule Other 4 2021
Arsenic MR 4 1999
Coliform (TCR) MCL 4 1999
Nitrate MR 3 1996
Nitrate-Nitrite MR 3 2000
Antimony, Total MR 3 1999
Beryllium, Total MR 3 1999
Revised Total Coliform Rule MON 3 2017
TTHM MR 3 2017
Thallium, Total MR 3 1999
Total Haloacetic Acids (HAA5) MR 3 2017
Nickel MR 3 1999
Cadmium MR 1 1984
Selenium MR 1 1984
Mercury MR 1 1984
Fluoride MR 1 1984
Chromium MR 1 1984
Barium MR 1 1984

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 Judith Gap 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 MT0000258 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
2021 Consumer Confidence Rule Other 4 SDWIS / MT0000258 / 7000
2020 Lead and Copper Rule MR 15 SDWIS / MT0000258 / 5000
2017 Revised Total Coliform Rule MON 3 SDWIS / MT0000258 / 8000
2017 TTHM MR 3 SDWIS / MT0000258 / 2950
2017 Total Haloacetic Acids (HAA5) MR 3 SDWIS / MT0000258 / 2456
2000 Nitrate-Nitrite MR 3 SDWIS / MT0000258 / 1038
1999 Arsenic MR 4 SDWIS / MT0000258 / 1005
1999 Coliform (TCR) MCL 4 SDWIS / MT0000258 / 3100
1999 Antimony, Total MR 3 SDWIS / MT0000258 / 1074
1999 Beryllium, Total MR 3 SDWIS / MT0000258 / 1075
1999 Thallium, Total MR 3 SDWIS / MT0000258 / 1085
1999 Nickel MR 3 SDWIS / MT0000258 / 1036
1996 Nitrate MR 3 SDWIS / MT0000258 / 1040
1984 Cadmium MR 1 SDWIS / MT0000258 / 1015
1984 Selenium MR 1 SDWIS / MT0000258 / 1045

How Judith Gap Town Of Compares

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

Metric Judith Gap Town Of Montana avg Federal benchmark
Total violations 64 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 126 492 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 Judith Gap Town Of water safe to drink? ▼
Judith Gap Town Of (PWS ID: MT0000258) has 64 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 126 people using Groundwater sources.
How many people does Judith Gap Town Of serve? ▼
Judith Gap Town Of serves 126 people in Judith Gap, Montana. It is a Local-owned system using Groundwater water sources with 79 service connections.
What type of violations does Judith Gap Town Of have? ▼
Judith Gap Town Of has 64 total violations: 4 health-based violations (MCL exceedances or treatment failures), 52 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Judith Gap Town Of water? ▼
No PFAS testing data is available for Judith Gap Town Of under the EPA's UCMR5 monitoring program.
What water source does Judith Gap Town Of use? ▼
Judith Gap 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. 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.