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Non-Transient Non-Community Water System · PWS MT0001170

Trego School Dist 53

Trego, Montana 59934 - drinking water served from groundwater sources to 47 people, tracked in EPA SDWIS and UCMR5.

47
People served
119
EPA violations
26
Health-based
Untested
UCMR5 result

The verdict

EPA records 119 drinking-water violations at Trego School Dist 53, 22% of them health-based - below the Montana per-system average.

119
Total EPA violations on record
22%
Health-based (MCL / treatment failure)
47
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Trego School Dist 53

Trego School Dist 53 is a local-owned non-transient non-community water system that delivers drinking water to 47 residents in Trego, Montana (Lincoln County) through 3 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 119 total violations for this system , of which 26 (22%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 90 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 26 violations (MCL, health-based). 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, 5 of 45 UCMR5-tested systems have reported PFAS detections (11.1%).

Trego School Dist 53's 119 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
47
Total Violations
119
Health-Based Violations
26
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
3
County
Lincoln
School/Daycare
Yes
MCL Violations
26
Monitoring Violations
90
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 26 2013
Lead and Copper Rule MR 9 2007
Coliform (TCR) MR 7 2014
Asbestos MR 4 2011
1,2,4-Trichlorobenzene MR 3 2002
Xylenes, Total MR 3 2002
o-Dichlorobenzene MR 3 2002
p-Dichlorobenzene MR 3 2002
trans-1,2-Dichloroethylene MR 3 2002
1,2-Dichloroethane MR 3 2002
1,1,2-Trichloroethane MR 3 2002
Tetrachloroethylene MR 3 2002
CHLOROBENZENE MR 3 2002
Styrene MR 3 2002
Fluoride MR 3 2011
Trichloroethylene MR 3 2002
Ethylbenzene MR 3 2002
Benzene MR 3 2002
1,1,1-Trichloroethane MR 3 2002
Revised Total Coliform Rule MON 3 2019
1,1-Dichloroethylene MR 3 2002
Vinyl chloride MR 3 2002
Carbon tetrachloride MR 3 2002
DICHLOROMETHANE MR 3 2002
1,2-Dichloropropane MR 3 2002
cis-1,2-Dichloroethylene MR 3 2002
Toluene MR 3 2002
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 Trego School Dist 53.

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 MT0001170 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
2019 Revised Total Coliform Rule MON 3 SDWIS / MT0001170 / 8000
2014 Coliform (TCR) MR 7 SDWIS / MT0001170 / 3100
2013 Coliform (TCR) MCL 26 SDWIS / MT0001170 / 3100
2011 Asbestos MR 4 SDWIS / MT0001170 / 1094
2011 Fluoride MR 3 SDWIS / MT0001170 / 1025
2007 Lead and Copper Rule MR 9 SDWIS / MT0001170 / 5000
2002 1,2,4-Trichlorobenzene MR 3 SDWIS / MT0001170 / 2378
2002 Xylenes, Total MR 3 SDWIS / MT0001170 / 2955
2002 o-Dichlorobenzene MR 3 SDWIS / MT0001170 / 2968
2002 p-Dichlorobenzene MR 3 SDWIS / MT0001170 / 2969
2002 trans-1,2-Dichloroethylene MR 3 SDWIS / MT0001170 / 2979
2002 1,2-Dichloroethane MR 3 SDWIS / MT0001170 / 2980
2002 1,1,2-Trichloroethane MR 3 SDWIS / MT0001170 / 2985
2002 Tetrachloroethylene MR 3 SDWIS / MT0001170 / 2987
2002 CHLOROBENZENE MR 3 SDWIS / MT0001170 / 2989

How Trego School Dist 53 Compares

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

Metric Trego School Dist 53 Montana avg Federal benchmark
Total violations 119 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 26 11.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 11.1% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 47 492 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 Trego School Dist 53 water safe to drink? ▼
Trego School Dist 53 (PWS ID: MT0001170) has 119 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 47 people using Groundwater sources.
How many people does Trego School Dist 53 serve? ▼
Trego School Dist 53 serves 47 people in Trego, Montana. It is a Local-owned system using Groundwater water sources with 3 service connections.
What type of violations does Trego School Dist 53 have? ▼
Trego School Dist 53 has 119 total violations: 26 health-based violations (MCL exceedances or treatment failures), 90 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Trego School Dist 53 water? ▼
No PFAS testing data is available for Trego School Dist 53 under the EPA's UCMR5 monitoring program.
What water source does Trego School Dist 53 use? ▼
Trego School Dist 53 uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.