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Community Water System · PWS MT0000338

Sunburst Town Of

Sunburst, Montana 59482 - drinking water served from groundwater sources to 459 people, tracked in EPA SDWIS and UCMR5.

459
People served
243
EPA violations
13
Health-based
Untested
UCMR5 result

The verdict

EPA records 243 drinking-water violations at Sunburst Town Of, 5% of them health-based - above the Montana per-system average.

243
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
459
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Sunburst Town Of

Sunburst Town Of is a local-owned community water system that delivers drinking water to 459 residents in Sunburst, Montana (Toole County) through 180 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 243 total violations for this system , of which 13 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 219 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 75 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%).

Sunburst Town Of's 243 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
459
Total Violations
243
Health-Based Violations
13
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
180
County
Toole
School/Daycare
No
MCL Violations
13
Monitoring Violations
219
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 75 2008
Coliform (TCR) MR 48 2014
Gross Alpha, Excl. Radon and U MR 32 2009
Combined Radium (-226 and -228) MR 28 2009
Chlorine MR 15 2014
Coliform (TCR) MCL 13 2001
E. COLI MR 9 2011
Revised Total Coliform Rule MON 6 2019
Consumer Confidence Rule Other 5 2025
TTHM MR 3 2014
Total Haloacetic Acids (HAA5) MR 3 2014
Revised Total Coliform Rule Other 3 2016

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 Sunburst 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 MT0000338 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
2025 Consumer Confidence Rule Other 5 SDWIS / MT0000338 / 7000
2019 Revised Total Coliform Rule MON 6 SDWIS / MT0000338 / 8000
2016 Revised Total Coliform Rule Other 3 SDWIS / MT0000338 / 8000
2014 Coliform (TCR) MR 48 SDWIS / MT0000338 / 3100
2014 Chlorine MR 15 SDWIS / MT0000338 / 0999
2014 TTHM MR 3 SDWIS / MT0000338 / 2950
2014 Total Haloacetic Acids (HAA5) MR 3 SDWIS / MT0000338 / 2456
2011 E. COLI MR 9 SDWIS / MT0000338 / 3014
2009 Gross Alpha, Excl. Radon and U MR 32 SDWIS / MT0000338 / 4000
2009 Combined Radium (-226 and -228) MR 28 SDWIS / MT0000338 / 4010
2008 Lead and Copper Rule MR 75 SDWIS / MT0000338 / 5000
2001 Coliform (TCR) MCL 13 SDWIS / MT0000338 / 3100

How Sunburst Town Of Compares

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

Metric Sunburst Town Of Montana avg Federal benchmark
Total violations 243 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 13 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 459 492 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 Sunburst Town Of water safe to drink? ▼
Sunburst Town Of (PWS ID: MT0000338) has 243 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 459 people using Groundwater sources.
How many people does Sunburst Town Of serve? ▼
Sunburst Town Of serves 459 people in Sunburst, Montana. It is a Local-owned system using Groundwater water sources with 180 service connections.
What type of violations does Sunburst Town Of have? ▼
Sunburst Town Of has 243 total violations: 13 health-based violations (MCL exceedances or treatment failures), 219 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Sunburst Town Of water? ▼
No PFAS testing data is available for Sunburst Town Of under the EPA's UCMR5 monitoring program.
What water source does Sunburst Town Of use? ▼
Sunburst 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.