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States → Montana

Non-Transient Non-Community Water System · PWS MT0003615

Potomac Greenough Community Center

Bonner, Montana 59823 - drinking water served from groundwater sources to 150 people, tracked in EPA SDWIS and UCMR5.

150
People served
801
EPA violations
29
Health-based
Untested
UCMR5 result

The verdict

EPA records 801 drinking-water violations at Potomac Greenough Community Center, 4% of them health-based - above the Montana per-system average.

801
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
150
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Potomac Greenough Community Center

Potomac Greenough Community Center is a private-owned non-transient non-community water system that delivers drinking water to 150 residents in Bonner, Montana (Missoula County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 801 total violations for this system , of which 29 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 766 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 71 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%).

Potomac Greenough Community Center's 801 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
150
Total Violations
801
Health-Based Violations
29
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Missoula
School/Daycare
Yes
MCL Violations
29
Monitoring Violations
766
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 71 2015
Lead and Copper Rule MR 33 2012
Arsenic MR 30 2016
Nitrate-Nitrite MR 27 2012
Coliform (TCR) MCL 25 2006
Barium MR 15 2002
Chromium MR 15 2002
Fluoride MR 15 2002
Mercury MR 15 2002
Nickel MR 15 2002
Beryllium, Total MR 15 2002
Cadmium MR 15 2002
Antimony, Total MR 15 2002
Thallium, Total MR 15 2002
Selenium MR 15 2002
Aldicarb sulfoxide MR 13 2005
Aldicarb sulfone MR 13 2005
Aldicarb MR 13 2005
Carbofuran MR 13 2005
OXAMYL MR 13 2005
Nitrate MR 11 1999
Endrin MR 10 1999
BHC-GAMMA MR 10 1999
Methoxychlor MR 10 1999
Simazine MR 10 1999
Dinoseb MR 10 1999
LASSO MR 10 1999
Heptachlor MR 10 1999
Heptachlor epoxide MR 10 1999
2,4-D MR 10 1999

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 Potomac Greenough Community Center.

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 MT0003615 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
2023 Revised Total Coliform Rule MON 9 SDWIS / MT0003615 / 8000
2019 Arsenic MCL 4 SDWIS / MT0003615 / 1005
2016 Arsenic MR 30 SDWIS / MT0003615 / 1005
2015 Coliform (TCR) MR 71 SDWIS / MT0003615 / 3100
2012 Lead and Copper Rule MR 33 SDWIS / MT0003615 / 5000
2012 Nitrate-Nitrite MR 27 SDWIS / MT0003615 / 1038
2006 Coliform (TCR) MCL 25 SDWIS / MT0003615 / 3100
2005 Aldicarb sulfoxide MR 13 SDWIS / MT0003615 / 2043
2005 Aldicarb sulfone MR 13 SDWIS / MT0003615 / 2044
2005 Aldicarb MR 13 SDWIS / MT0003615 / 2047
2005 Carbofuran MR 13 SDWIS / MT0003615 / 2046
2005 OXAMYL MR 13 SDWIS / MT0003615 / 2036
2002 Barium MR 15 SDWIS / MT0003615 / 1010
2002 Chromium MR 15 SDWIS / MT0003615 / 1020
2002 Fluoride MR 15 SDWIS / MT0003615 / 1025

How Potomac Greenough Community Center Compares

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

Metric Potomac Greenough Community Center Montana avg Federal benchmark
Total violations 801 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 29 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 150 492 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 Potomac Greenough Community Center water safe to drink? ▼
Potomac Greenough Community Center (PWS ID: MT0003615) has 801 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 150 people using Groundwater sources.
How many people does Potomac Greenough Community Center serve? ▼
Potomac Greenough Community Center serves 150 people in Bonner, Montana. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Potomac Greenough Community Center have? ▼
Potomac Greenough Community Center has 801 total violations: 29 health-based violations (MCL exceedances or treatment failures), 766 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Potomac Greenough Community Center water? ▼
No PFAS testing data is available for Potomac Greenough Community Center under the EPA's UCMR5 monitoring program.
What water source does Potomac Greenough Community Center use? ▼
Potomac Greenough Community Center 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.