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Non-Transient Non-Community Water System · PWS MT0004578

Montessori Island School

Livingston, Montana 59047 - drinking water served from groundwater sources to 64 people, tracked in EPA SDWIS and UCMR5.

64
People served
96
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 96 drinking-water violations at Montessori Island School - below the Montana per-system average.

96
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
64
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Montessori Island School

Montessori Island School is a private-owned non-transient non-community water system that delivers drinking water to 64 residents in Livingston, Montana (Park County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 96 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 96 monitoring and reporting violations are on file. The most recent violation on record dates to 2011.

The most frequently cited contaminant at this system is 1,2-Dichloroethane, recorded in 4 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%).

Montessori Island School's 96 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
64
Total Violations
96
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Park
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
96
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2-Dichloroethane MR 4 2008
Carbon tetrachloride MR 4 2008
1,2-Dichloropropane MR 4 2008
1,1,2-Trichloroethane MR 4 2008
Tetrachloroethylene MR 4 2008
Toluene MR 4 2008
Ethylbenzene MR 4 2008
cis-1,2-Dichloroethylene MR 4 2008
Styrene MR 4 2008
o-Dichlorobenzene MR 4 2008
p-Dichlorobenzene MR 4 2008
Vinyl chloride MR 4 2008
1,1-Dichloroethylene MR 4 2008
1,2,4-Trichlorobenzene MR 4 2008
DICHLOROMETHANE MR 4 2008
CHLOROBENZENE MR 4 2008
Trichloroethylene MR 4 2008
Xylenes, Total MR 4 2008
1,1,1-Trichloroethane MR 4 2008
Benzene MR 4 2008
trans-1,2-Dichloroethylene MR 4 2008
Antimony, Total MR 3 2011
Beryllium, Total MR 3 2011
Thallium, Total MR 3 2011
Nickel MR 3 2011

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 Montessori Island 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 MT0004578 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
2011 Antimony, Total MR 3 SDWIS / MT0004578 / 1074
2011 Beryllium, Total MR 3 SDWIS / MT0004578 / 1075
2011 Thallium, Total MR 3 SDWIS / MT0004578 / 1085
2011 Nickel MR 3 SDWIS / MT0004578 / 1036
2008 1,2-Dichloroethane MR 4 SDWIS / MT0004578 / 2980
2008 Carbon tetrachloride MR 4 SDWIS / MT0004578 / 2982
2008 1,2-Dichloropropane MR 4 SDWIS / MT0004578 / 2983
2008 1,1,2-Trichloroethane MR 4 SDWIS / MT0004578 / 2985
2008 Tetrachloroethylene MR 4 SDWIS / MT0004578 / 2987
2008 Toluene MR 4 SDWIS / MT0004578 / 2991
2008 Ethylbenzene MR 4 SDWIS / MT0004578 / 2992
2008 cis-1,2-Dichloroethylene MR 4 SDWIS / MT0004578 / 2380
2008 Styrene MR 4 SDWIS / MT0004578 / 2996
2008 o-Dichlorobenzene MR 4 SDWIS / MT0004578 / 2968
2008 p-Dichlorobenzene MR 4 SDWIS / MT0004578 / 2969

How Montessori Island School Compares

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

Metric Montessori Island School Montana avg Federal benchmark
Total violations 96 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 64 492 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 Montessori Island School water safe to drink? ▼
Montessori Island School (PWS ID: MT0004578) has 96 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 64 people using Groundwater sources.
How many people does Montessori Island School serve? ▼
Montessori Island School serves 64 people in Livingston, Montana. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Montessori Island School have? ▼
Montessori Island School has 96 total violations: 0 health-based violations (MCL exceedances or treatment failures), 96 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Montessori Island School water? ▼
No PFAS testing data is available for Montessori Island School under the EPA's UCMR5 monitoring program.
What water source does Montessori Island School use? ▼
Montessori Island 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.