Public water system · MT0000416
ActiveMontana Aviation Research Co
At a glance
Montana Aviation Research Co (PWSID MT0000416) is an active non-transient non-community water system in Valley County, Montana. It reports serving 70 people through 5 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
70
Service connections
5
Primary source
SWP
Purchased surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Montana Aviation Research Co compare with other water systems in Valley County?
By EPA's size categories, Montana Aviation Research Co is a very small system (500 people or fewer). Valley County has 13 active public water systems. Its population served is well below the county average of 466 people per system, and accounts for 1.2% of the 6,060 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Montana Aviation Research Co is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Montana has 319 active non-transient non-community water systems, 13% of the state's 2,378 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 212 Montana systems (8.9%) list purchased surface water as their primary source.
Who owns and regulates Montana Aviation Research Co?
EPA lists Montana Aviation Research Co as privately owned. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 13 active systems in Valley County (31%) are also privately owned.
Does Montana Aviation Research Co have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2020. The violations listed here began between January 1994 and July 2020. By type: 8 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 10 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2020-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2017-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2014-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2008-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2003-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
All 10 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Montana Aviation Research Co: frequently asked questions
Who runs Montana Aviation Research Co?
Montana Aviation Research Co (PWSID MT0000416) is a non-transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Montana Aviation Research Co serve?
Montana Aviation Research Co reports serving 70 people through 5 service connections in Valley County, Montana.
Where does Montana Aviation Research Co get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Montana Aviation Research Co have any drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2020. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Montana Aviation Research Co's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 10 violations for this system; none is health-based, and the most recent began in July 2020. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Montana Aviation Research Co's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Montana Aviation Research Co is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Valley County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Glasgow City of | Valley | 3,253 | Community | Surface water |
| Fort Peck Rural County Water District | Valley | 663 | Community | Purchased surface water |
| North Valley County Water and Sewer Dist | Valley | 450 | Community | Purchased surface water |
| Nashua Town of | Valley | 300 | Community | Purchased surface water |
| Hinsdale Water Department | Valley | 250 | Community | Groundwater |
| Vandalia Glasgow West Rest Area | Valley | 250 | Transient non-community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Montana Aviation Research Co, PWSID MT0000416, Montana”, https://aquacensus.com/water-systems/montana/montana-aviation-research-co-mt0000416 (data as of October 1, 2026).