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Community Water System · PWS MT0000368

Tamarack Court

Missoula, Montana 59801 - drinking water served from groundwater sources to 75 people, tracked in EPA SDWIS and UCMR5.

75
People served
195
EPA violations
49
Health-based
Untested
UCMR5 result

The verdict

EPA records 195 drinking-water violations at Tamarack Court, 25% of them health-based - above the Montana per-system average.

195
Total EPA violations on record
25%
Health-based (MCL / treatment failure)
75
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Tamarack Court

Tamarack Court is a private-owned community water system that delivers drinking water to 75 residents in Missoula, Montana (Missoula County) through 26 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 195 total violations for this system , of which 49 (25%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 138 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 Groundwater Rule, recorded in 37 violations (TT, 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%).

Tamarack Court's 195 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
195
Health-Based Violations
49
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
26
County
Missoula
School/Daycare
No
MCL Violations
12
Monitoring Violations
138
Treatment Tech Violations
37

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule TT 37 2024
Groundwater Rule MR 27 2023
Coliform (TCR) MCL 12 2008
Chlorine MR 12 2014
Nitrate-Nitrite MR 10 2013
Lead and Copper Rule MR 6 2019
Coliform (TCR) MR 5 1999
Endrin MR 3 2011
BHC-GAMMA MR 3 2011
Methoxychlor MR 3 2011
Toxaphene MR 3 2011
Dalapon MR 3 2011
OXAMYL MR 3 2011
Simazine MR 3 2011
Picloram MR 3 2011
Carbofuran MR 3 2011
Aldicarb MR 3 2011
LASSO MR 3 2011
2,4-D MR 3 2011
HEXACHLOROBENZENE MR 3 2011
Benzo(a)pyrene MR 3 2011
Chlordane MR 3 2011
Heptachlor epoxide MR 3 2011
Heptachlor MR 3 2011
Aldicarb sulfone MR 3 2011
Hexachlorocyclopentadiene MR 3 2011
Dinoseb MR 3 2011
Aldicarb sulfoxide MR 3 2011
Pentachlorophenol MR 3 2011
Di(2-ethylhexyl) adipate 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 Tamarack Court.

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 MT0000368 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 Groundwater Rule TT 37 SDWIS / MT0000368 / 0700
2023 Groundwater Rule MR 27 SDWIS / MT0000368 / 0700
2019 Lead and Copper Rule MR 6 SDWIS / MT0000368 / 5000
2018 Consumer Confidence Rule Other 2 SDWIS / MT0000368 / 7000
2014 Chlorine MR 12 SDWIS / MT0000368 / 0999
2013 Nitrate-Nitrite MR 10 SDWIS / MT0000368 / 1038
2011 Endrin MR 3 SDWIS / MT0000368 / 2005
2011 BHC-GAMMA MR 3 SDWIS / MT0000368 / 2010
2011 Methoxychlor MR 3 SDWIS / MT0000368 / 2015
2011 Toxaphene MR 3 SDWIS / MT0000368 / 2020
2011 Dalapon MR 3 SDWIS / MT0000368 / 2031
2011 OXAMYL MR 3 SDWIS / MT0000368 / 2036
2011 Simazine MR 3 SDWIS / MT0000368 / 2037
2011 Picloram MR 3 SDWIS / MT0000368 / 2040
2011 Carbofuran MR 3 SDWIS / MT0000368 / 2046

How Tamarack Court Compares

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

Metric Tamarack Court Montana avg Federal benchmark
Total violations 195 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 49 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 Tamarack Court water safe to drink? ▼
Tamarack Court (PWS ID: MT0000368) has 195 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 Tamarack Court serve? ▼
Tamarack Court serves 75 people in Missoula, Montana. It is a Private-owned system using Groundwater water sources with 26 service connections.
What type of violations does Tamarack Court have? ▼
Tamarack Court has 195 total violations: 49 health-based violations (MCL exceedances or treatment failures), 138 monitoring/reporting violations, and 37 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Tamarack Court water? ▼
No PFAS testing data is available for Tamarack Court under the EPA's UCMR5 monitoring program.
What water source does Tamarack Court use? ▼
Tamarack Court 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.