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Community Water System · PWS MT0002393

Goodan Keil Co Water Dist

Missoula, Montana 59808 - drinking water served from groundwater sources to 207 people, tracked in EPA SDWIS and UCMR5.

207
People served
329
EPA violations
95
Health-based
Untested
UCMR5 result

The verdict

EPA records 329 drinking-water violations at Goodan Keil Co Water Dist, 29% of them health-based - above the Montana per-system average.

329
Total EPA violations on record
29%
Health-based (MCL / treatment failure)
207
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Goodan Keil Co Water Dist

Goodan Keil Co Water Dist is a local-owned community water system that delivers drinking water to 207 residents in Missoula, Montana (Missoula County) through 83 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 329 total violations for this system , of which 95 (29%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 230 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 92 violations (MCL, 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, 28 of 45 UCMR5-tested systems have reported PFAS detections (62.2%).

Goodan Keil Co Water Dist's 329 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
207
Total Violations
329
Health-Based Violations
95
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
83
County
Missoula
School/Daycare
No
MCL Violations
92
Monitoring Violations
230
Treatment Tech Violations
3

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 92 2015
Coliform (TCR) MR 52 1999
Barium MR 3 2002
Cadmium MR 3 2002
Fluoride MR 3 2002
Mercury MR 3 2002
Nickel MR 3 2002
Antimony, Total MR 3 2002
Endrin MR 3 2002
BHC-GAMMA MR 3 2002
Toxaphene MR 3 2002
Dalapon MR 3 2002
Dinoseb MR 3 2002
Hexachlorocyclopentadiene MR 3 2002
Aldicarb sulfoxide MR 3 2002
Carbofuran MR 3 2002
Atrazine MR 3 2002
Heptachlor MR 3 2002
2,4-D MR 3 2002
2,4,5-TP MR 3 2002
Benzo(a)pyrene MR 3 2002
o-Dichlorobenzene MR 3 2002
1,1-Dichloroethylene MR 3 2002
trans-1,2-Dichloroethylene MR 3 2002
1,1,1-Trichloroethane MR 3 2002
Carbon tetrachloride MR 3 2002
1,2-Dichloropropane MR 3 2002
Trichloroethylene MR 3 2002
Styrene MR 3 2002
Tetrachloroethylene MR 3 2002

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 Goodan Keil Co Water Dist.

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 MT0002393 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 TT 3 SDWIS / MT0002393 / 8000
2015 Coliform (TCR) MCL 92 SDWIS / MT0002393 / 3100
2006 Nitrate-Nitrite MR 3 SDWIS / MT0002393 / 1038
2002 Barium MR 3 SDWIS / MT0002393 / 1010
2002 Cadmium MR 3 SDWIS / MT0002393 / 1015
2002 Fluoride MR 3 SDWIS / MT0002393 / 1025
2002 Mercury MR 3 SDWIS / MT0002393 / 1035
2002 Nickel MR 3 SDWIS / MT0002393 / 1036
2002 Antimony, Total MR 3 SDWIS / MT0002393 / 1074
2002 Endrin MR 3 SDWIS / MT0002393 / 2005
2002 BHC-GAMMA MR 3 SDWIS / MT0002393 / 2010
2002 Toxaphene MR 3 SDWIS / MT0002393 / 2020
2002 Dalapon MR 3 SDWIS / MT0002393 / 2031
2002 Dinoseb MR 3 SDWIS / MT0002393 / 2041
2002 Hexachlorocyclopentadiene MR 3 SDWIS / MT0002393 / 2042

How Goodan Keil Co Water Dist Compares

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

Metric Goodan Keil Co Water Dist Montana avg Federal benchmark
Total violations 329 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 95 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 207 492 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 Goodan Keil Co Water Dist water safe to drink? ▼
Goodan Keil Co Water Dist (PWS ID: MT0002393) has 329 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 207 people using Groundwater sources.
How many people does Goodan Keil Co Water Dist serve? ▼
Goodan Keil Co Water Dist serves 207 people in Missoula, Montana. It is a Local-owned system using Groundwater water sources with 83 service connections.
What type of violations does Goodan Keil Co Water Dist have? ▼
Goodan Keil Co Water Dist has 329 total violations: 95 health-based violations (MCL exceedances or treatment failures), 230 monitoring/reporting violations, and 3 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Goodan Keil Co Water Dist water? ▼
No PFAS testing data is available for Goodan Keil Co Water Dist under the EPA's UCMR5 monitoring program.
What water source does Goodan Keil Co Water Dist use? ▼
Goodan Keil Co Water Dist 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.