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Community Water System · PWS MT0004367

Aspen Knoll

Kalispell, Montana 59901 - drinking water served from groundwater sources to 75 people, tracked in EPA SDWIS and UCMR5.

75
People served
228
EPA violations
6
Health-based
Untested
UCMR5 result

The verdict

EPA records 228 drinking-water violations at Aspen Knoll, 3% of them health-based - above the Montana per-system average.

228
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
75
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Aspen Knoll

Aspen Knoll is a private-owned community water system that delivers drinking water to 75 residents in Kalispell, Montana (Flathead County) through 27 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 228 total violations for this system , of which 6 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 218 monitoring and reporting violations are on file. The most recent violation on record dates to 2013.

The most frequently cited contaminant at this system is DICHLOROMETHANE, recorded in 10 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, 5 of 45 UCMR5-tested systems have reported PFAS detections (11.1%).

Aspen Knoll's 228 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
75
Total Violations
228
Health-Based Violations
6
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
27
County
Flathead
School/Daycare
No
MCL Violations
6
Monitoring Violations
218
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
DICHLOROMETHANE MR 10 2006
o-Dichlorobenzene MR 10 2006
1,1-Dichloroethylene MR 10 2006
trans-1,2-Dichloroethylene MR 10 2006
1,2-Dichloroethane MR 10 2006
Carbon tetrachloride MR 10 2006
1,2-Dichloropropane MR 10 2006
1,1,2-Trichloroethane MR 10 2006
Tetrachloroethylene MR 10 2006
CHLOROBENZENE MR 10 2006
Benzene MR 10 2006
Toluene MR 10 2006
Styrene MR 10 2006
1,2,4-Trichlorobenzene MR 10 2006
cis-1,2-Dichloroethylene MR 10 2006
Xylenes, Total MR 10 2006
p-Dichlorobenzene MR 10 2006
1,1,1-Trichloroethane MR 10 2006
Ethylbenzene MR 10 2006
Vinyl chloride MR 10 2006
Trichloroethylene MR 10 2006
Lead and Copper Rule MR 8 2007
Coliform (TCR) MCL 6 2004
Consumer Confidence Rule Other 4 2013

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 Aspen Knoll.

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 MT0004367 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
2013 Consumer Confidence Rule Other 4 SDWIS / MT0004367 / 7000
2007 Lead and Copper Rule MR 8 SDWIS / MT0004367 / 5000
2006 DICHLOROMETHANE MR 10 SDWIS / MT0004367 / 2964
2006 o-Dichlorobenzene MR 10 SDWIS / MT0004367 / 2968
2006 1,1-Dichloroethylene MR 10 SDWIS / MT0004367 / 2977
2006 trans-1,2-Dichloroethylene MR 10 SDWIS / MT0004367 / 2979
2006 1,2-Dichloroethane MR 10 SDWIS / MT0004367 / 2980
2006 Carbon tetrachloride MR 10 SDWIS / MT0004367 / 2982
2006 1,2-Dichloropropane MR 10 SDWIS / MT0004367 / 2983
2006 1,1,2-Trichloroethane MR 10 SDWIS / MT0004367 / 2985
2006 Tetrachloroethylene MR 10 SDWIS / MT0004367 / 2987
2006 CHLOROBENZENE MR 10 SDWIS / MT0004367 / 2989
2006 Benzene MR 10 SDWIS / MT0004367 / 2990
2006 Toluene MR 10 SDWIS / MT0004367 / 2991
2006 Styrene MR 10 SDWIS / MT0004367 / 2996

How Aspen Knoll Compares

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

Metric Aspen Knoll Montana avg Federal benchmark
Total violations 228 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 6 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 75 492 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 Aspen Knoll water safe to drink? ▼
Aspen Knoll (PWS ID: MT0004367) has 228 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 75 people using Groundwater sources.
How many people does Aspen Knoll serve? ▼
Aspen Knoll serves 75 people in Kalispell, Montana. It is a Private-owned system using Groundwater water sources with 27 service connections.
What type of violations does Aspen Knoll have? ▼
Aspen Knoll has 228 total violations: 6 health-based violations (MCL exceedances or treatment failures), 218 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Aspen Knoll water? ▼
No PFAS testing data is available for Aspen Knoll under the EPA's UCMR5 monitoring program.
What water source does Aspen Knoll use? ▼
Aspen Knoll 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.