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Community Water System · PWS MT0000467

Bonner Housing PWS System

Missoula, Montana 59806 - drinking water served from groundwater sources to 128 people, tracked in EPA SDWIS and UCMR5.

128
People served
82
EPA violations
35
Health-based
Untested
UCMR5 result

The verdict

EPA records 82 drinking-water violations at Bonner Housing PWS System, 43% of them health-based - below the Montana per-system average.

82
Total EPA violations on record
43%
Health-based (MCL / treatment failure)
128
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Bonner Housing PWS System

Bonner Housing PWS System is a private-owned community water system that delivers drinking water to 128 residents in Missoula, Montana (Missoula County) through 48 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 82 total violations for this system , of which 35 (43%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 46 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 35 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%).

Bonner Housing PWS System's 82 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
128
Total Violations
82
Health-Based Violations
35
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
48
County
Missoula
School/Daycare
No
MCL Violations
35
Monitoring Violations
46
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 35 2012
Coliform (TCR) MR 13 2010
Lead and Copper Rule MR 11 2003
Picloram MR 3 2005
Dinoseb MR 3 2005
2,4-D MR 3 2005
Pentachlorophenol MR 3 2005
2,4,5-TP MR 3 2005
E. COLI MR 3 2017
Dalapon MR 3 2005
Nitrate MR 1 1993

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 Bonner Housing PWS System.

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 MT0000467 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
2017 E. COLI MR 3 SDWIS / MT0000467 / 3014
2012 Coliform (TCR) MCL 35 SDWIS / MT0000467 / 3100
2010 Coliform (TCR) MR 13 SDWIS / MT0000467 / 3100
2005 Picloram MR 3 SDWIS / MT0000467 / 2040
2005 Dinoseb MR 3 SDWIS / MT0000467 / 2041
2005 2,4-D MR 3 SDWIS / MT0000467 / 2105
2005 Pentachlorophenol MR 3 SDWIS / MT0000467 / 2326
2005 2,4,5-TP MR 3 SDWIS / MT0000467 / 2110
2005 Dalapon MR 3 SDWIS / MT0000467 / 2031
2003 Lead and Copper Rule MR 11 SDWIS / MT0000467 / 5000
1993 Nitrate MR 1 SDWIS / MT0000467 / 1040

How Bonner Housing PWS System Compares

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

Metric Bonner Housing PWS System Montana avg Federal benchmark
Total violations 82 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 35 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 128 492 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 Bonner Housing PWS System water safe to drink? ▼
Bonner Housing PWS System (PWS ID: MT0000467) has 82 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 128 people using Groundwater sources.
How many people does Bonner Housing PWS System serve? ▼
Bonner Housing PWS System serves 128 people in Missoula, Montana. It is a Private-owned system using Groundwater water sources with 48 service connections.
What type of violations does Bonner Housing PWS System have? ▼
Bonner Housing PWS System has 82 total violations: 35 health-based violations (MCL exceedances or treatment failures), 46 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Bonner Housing PWS System water? ▼
No PFAS testing data is available for Bonner Housing PWS System under the EPA's UCMR5 monitoring program.
What water source does Bonner Housing PWS System use? ▼
Bonner Housing PWS System 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.