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Non-Transient Non-Community Water System · PWS MT0004105

Kalispell Montessori School

Bigfork, Montana 59911 - drinking water served from groundwater sources to 200 people, tracked in EPA SDWIS and UCMR5.

200
People served
47
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 47 drinking-water violations at Kalispell Montessori School, 15% of them health-based - below the Montana per-system average.

47
Total EPA violations on record
15%
Health-based (MCL / treatment failure)
200
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Kalispell Montessori School

Kalispell Montessori School is a private-owned non-transient non-community water system that delivers drinking water to 200 residents in Bigfork, Montana (Flathead County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 47 total violations for this system , of which 7 (15%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 34 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 22 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%).

Kalispell Montessori School's 47 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
200
Total Violations
47
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Flathead
School/Daycare
Yes
MCL Violations
7
Monitoring Violations
34
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 22 2015
Di(2-ethylhexyl) phthalate MR 7 2014
Revised Total Coliform Rule RPT 6 2019
Coliform (TCR) MCL 4 2003
Revised Total Coliform Rule MON 4 2017
Di(2-ethylhexyl) phthalate MCL 3 2002
Lead and Copper Rule MR 1 2001

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 Kalispell Montessori 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 MT0004105 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 RPT 6 SDWIS / MT0004105 / 8000
2017 Revised Total Coliform Rule MON 4 SDWIS / MT0004105 / 8000
2015 Coliform (TCR) MR 22 SDWIS / MT0004105 / 3100
2014 Di(2-ethylhexyl) phthalate MR 7 SDWIS / MT0004105 / 2039
2003 Coliform (TCR) MCL 4 SDWIS / MT0004105 / 3100
2002 Di(2-ethylhexyl) phthalate MCL 3 SDWIS / MT0004105 / 2039
2001 Lead and Copper Rule MR 1 SDWIS / MT0004105 / 5000

How Kalispell Montessori School Compares

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

Metric Kalispell Montessori School Montana avg Federal benchmark
Total violations 47 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 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 200 492 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 Kalispell Montessori School water safe to drink? ▼
Kalispell Montessori School (PWS ID: MT0004105) has 47 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 200 people using Groundwater sources.
How many people does Kalispell Montessori School serve? ▼
Kalispell Montessori School serves 200 people in Bigfork, Montana. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Kalispell Montessori School have? ▼
Kalispell Montessori School has 47 total violations: 7 health-based violations (MCL exceedances or treatment failures), 34 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Kalispell Montessori School water? ▼
No PFAS testing data is available for Kalispell Montessori School under the EPA's UCMR5 monitoring program.
What water source does Kalispell Montessori School use? ▼
Kalispell Montessori 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.