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Community Water System · PWS MT0000444

Valley West Trailer Court

Lolo, Montana 59847 - drinking water served from groundwater sources to 115 people, tracked in EPA SDWIS and UCMR5.

115
People served
54
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 54 drinking-water violations at Valley West Trailer Court - below the Montana per-system average.

54
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
115
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Valley West Trailer Court

Valley West Trailer Court is a private-owned community water system that delivers drinking water to 115 residents in Lolo, Montana (Missoula County) through 46 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 54 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 45 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Nitrate-Nitrite, recorded in 15 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%).

Valley West Trailer Court's 54 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
115
Total Violations
54
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
46
County
Missoula
School/Daycare
No
MCL Violations
0
Monitoring Violations
45
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate-Nitrite MR 15 2021
Consumer Confidence Rule Other 6 2006
2,4-D MR 3 2005
2,4,5-TP MR 3 2005
Coliform (TCR) MR 3 2010
Dinoseb MR 3 2005
Pentachlorophenol MR 3 2005
Dalapon MR 3 2005
Picloram MR 3 2005
Nitrate MR 2 1993
Arsenic MR 1 1981
Mercury MR 1 1981
Cadmium MR 1 1981
Barium MR 1 1981
Selenium MR 1 1981
Chromium MR 1 1981
Fluoride MR 1 1981

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 Valley West Trailer 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 MT0000444 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
2021 Nitrate-Nitrite MR 15 SDWIS / MT0000444 / 1038
2010 Coliform (TCR) MR 3 SDWIS / MT0000444 / 3100
2006 Consumer Confidence Rule Other 6 SDWIS / MT0000444 / 7000
2005 2,4-D MR 3 SDWIS / MT0000444 / 2105
2005 2,4,5-TP MR 3 SDWIS / MT0000444 / 2110
2005 Dinoseb MR 3 SDWIS / MT0000444 / 2041
2005 Pentachlorophenol MR 3 SDWIS / MT0000444 / 2326
2005 Dalapon MR 3 SDWIS / MT0000444 / 2031
2005 Picloram MR 3 SDWIS / MT0000444 / 2040
1993 Nitrate MR 2 SDWIS / MT0000444 / 1040
1981 Arsenic MR 1 SDWIS / MT0000444 / 1005
1981 Mercury MR 1 SDWIS / MT0000444 / 1035
1981 Cadmium MR 1 SDWIS / MT0000444 / 1015
1981 Barium MR 1 SDWIS / MT0000444 / 1010
1981 Selenium MR 1 SDWIS / MT0000444 / 1045

How Valley West Trailer Court Compares

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

Metric Valley West Trailer Court Montana avg Federal benchmark
Total violations 54 131.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 115 492 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 Valley West Trailer Court water safe to drink? ▼
Valley West Trailer Court (PWS ID: MT0000444) has 54 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 115 people using Groundwater sources.
How many people does Valley West Trailer Court serve? ▼
Valley West Trailer Court serves 115 people in Lolo, Montana. It is a Private-owned system using Groundwater water sources with 46 service connections.
What type of violations does Valley West Trailer Court have? ▼
Valley West Trailer Court has 54 total violations: 0 health-based violations (MCL exceedances or treatment failures), 45 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Valley West Trailer Court water? ▼
No PFAS testing data is available for Valley West Trailer Court under the EPA's UCMR5 monitoring program.
What water source does Valley West Trailer Court use? ▼
Valley West Trailer 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.