Public water system · MT0005200
ActiveGrass Valley Industrial Park
At a glance
Grass Valley Industrial Park (PWSID MT0005200) is an active non-transient non-community water system in Missoula County, Montana. It reports serving 1,400 people through 19 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,400
Service connections
19
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Grass Valley Industrial Park compare with other water systems in Missoula County?
By EPA's size categories, Grass Valley Industrial Park is a small system (501 to 3,300 people). Missoula County has 244 active public water systems. Its population served is about 143% above the county average of 576 people per system, and accounts for 1% of the 140,505 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 Grass Valley Industrial Park is about 3.3 times 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Grass Valley Industrial Park?
EPA lists Grass Valley Industrial Park 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. 201 of the 244 active systems in Missoula County (82%) are also privately owned.
Does Grass Valley Industrial Park have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Grass Valley Industrial Park. For the latest compliance status, check EPA ECHO for current compliance history.
Grass Valley Industrial Park: frequently asked questions
Who runs Grass Valley Industrial Park?
Grass Valley Industrial Park (PWSID MT0005200) is a non-transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Grass Valley Industrial Park serve?
Grass Valley Industrial Park reports serving 1,400 people through 19 service connections in Missoula County, Montana.
Where does Grass Valley Industrial Park get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Grass Valley Industrial Park have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Grass Valley Industrial Park'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Grass Valley Industrial Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Grass Valley Industrial Park 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 Missoula County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Missoula Water | Missoula | 68,200 | Community | Groundwater |
| University of Montana | Missoula | 15,000 | Non-transient non-community | Purchased groundwater |
| Lolo Water and Sewer Dist | Missoula | 3,315 | Community | Groundwater |
| Town Pump Bonner 1 | Missoula | 2,460 | Non-transient non-community | Groundwater |
| Clearwater Junction Rest Area | Missoula | 2,002 | Transient non-community | Groundwater |
| Seeley Lake Water District | Missoula | 1,575 | Community | Surface water |
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, “Grass Valley Industrial Park, PWSID MT0005200, Montana”, https://aquacensus.com/water-systems/montana/grass-valley-industrial-park-mt0005200 (data as of October 1, 2026).