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Non-Transient Non-Community Water System · PWS MT0003416

Arlee Junior High School

Arlee, Montana 59821 - drinking water served from groundwater sources to 175 people, tracked in EPA SDWIS and UCMR5.

175
People served
236
EPA violations
5
Health-based
Untested
UCMR5 result

The verdict

EPA records 236 drinking-water violations at Arlee Junior High School, 2% of them health-based - above the Montana per-system average.

236
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
175
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Arlee Junior High School

Arlee Junior High School is a local-owned non-transient non-community water system that delivers drinking water to 175 residents in Arlee, Montana (Lake County) through 3 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 236 total violations for this system , of which 5 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 231 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 9 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%).

Arlee Junior High School's 236 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
175
Total Violations
236
Health-Based Violations
5
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
3
County
Lake
School/Daycare
Yes
MCL Violations
5
Monitoring Violations
231
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 9 2012
Di(2-ethylhexyl) phthalate MR 7 2008
Coliform (TCR) MCL 5 2012
cis-1,2-Dichloroethylene MR 4 1999
o-Dichlorobenzene MR 4 1999
p-Dichlorobenzene MR 4 1999
1,2-Dichloroethane MR 4 1999
Carbon tetrachloride MR 4 1999
1,1,2-Trichloroethane MR 4 1999
Tetrachloroethylene MR 4 1999
CHLOROBENZENE MR 4 1999
Toluene MR 4 1999
Styrene MR 4 1999
Endrin MR 4 1999
BHC-GAMMA MR 4 1999
Methoxychlor MR 4 1999
Toxaphene MR 4 1999
Dalapon MR 4 1999
Diquat MR 4 1999
Endothall MR 4 1999
Glyphosate MR 4 1999
Di(2-ethylhexyl) adipate MR 4 1999
OXAMYL MR 4 1999
Simazine MR 4 1999
Picloram MR 4 1999
Dinoseb MR 4 1999
Carbofuran MR 4 1999
Aldicarb MR 4 1999
Atrazine MR 4 1999
LASSO MR 4 1999

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 Arlee Junior High School.

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 MT0003416 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
2024 Lead and Copper Rule MR 2 SDWIS / MT0003416 / 5000
2012 Coliform (TCR) MR 9 SDWIS / MT0003416 / 3100
2012 Coliform (TCR) MCL 5 SDWIS / MT0003416 / 3100
2008 Di(2-ethylhexyl) phthalate MR 7 SDWIS / MT0003416 / 2039
1999 cis-1,2-Dichloroethylene MR 4 SDWIS / MT0003416 / 2380
1999 o-Dichlorobenzene MR 4 SDWIS / MT0003416 / 2968
1999 p-Dichlorobenzene MR 4 SDWIS / MT0003416 / 2969
1999 1,2-Dichloroethane MR 4 SDWIS / MT0003416 / 2980
1999 Carbon tetrachloride MR 4 SDWIS / MT0003416 / 2982
1999 1,1,2-Trichloroethane MR 4 SDWIS / MT0003416 / 2985
1999 Tetrachloroethylene MR 4 SDWIS / MT0003416 / 2987
1999 CHLOROBENZENE MR 4 SDWIS / MT0003416 / 2989
1999 Toluene MR 4 SDWIS / MT0003416 / 2991
1999 Styrene MR 4 SDWIS / MT0003416 / 2996
1999 Endrin MR 4 SDWIS / MT0003416 / 2005

How Arlee Junior High School Compares

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

Metric Arlee Junior High School Montana avg Federal benchmark
Total violations 236 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 5 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 175 492 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 Arlee Junior High School water safe to drink? ▼
Arlee Junior High School (PWS ID: MT0003416) has 236 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 175 people using Groundwater sources.
How many people does Arlee Junior High School serve? ▼
Arlee Junior High School serves 175 people in Arlee, Montana. It is a Local-owned system using Groundwater water sources with 3 service connections.
What type of violations does Arlee Junior High School have? ▼
Arlee Junior High School has 236 total violations: 5 health-based violations (MCL exceedances or treatment failures), 231 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Arlee Junior High School water? ▼
No PFAS testing data is available for Arlee Junior High School under the EPA's UCMR5 monitoring program.
What water source does Arlee Junior High School use? ▼
Arlee Junior High School 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.