Musselshell County, Montana — public water systems
At a glance
7 active public water systems are filed under Musselshell County, Montana in EPA's SDWIS records, together reporting 2,795 people served. The largest is Roundup Water Department, which reports serving 1,900 people. 4 are community water systems serving people where they live; the other 3 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
7
Population served
2.8K
Community systems
4
Groundwater share
100%
How does Musselshell County compare with other Montana counties?
Musselshell County has the 44th-most active public water systems among the 76 counties listed for active Montana systems in EPA records; among the 55 with 3 or more systems, the median has 16. Its systems report 2,795 people served in total, the 39th-largest county figure in the state and 0.2% of the statewide total. The average system here reports serving 399 people, about 18% below the Montana average of 489. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Musselshell County's drinking water come from?
By primary water source, Musselshell County's active systems draw on groundwater (5, 71%) and purchased groundwater (2, 29%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 89% and 11% across Montana. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Roundup Water Department, draws primarily on groundwater.
What kinds of water systems operate in Musselshell County?
Musselshell County's active systems break down as 4 community systems (57%), 1 non-transient non-community systems (14%) and 2 transient non-community systems (29%). A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. 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. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as private (57%) and local government (43%).
Water systems in Musselshell County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Roundup Water Department | Musselshell | 1,900 | Community | Groundwater |
| 2 | Picchionis Iga | Musselshell | 300 | Transient non-community | Purchased groundwater |
| 3 | Signal Peak Energy Bull Mountain Coal | Musselshell | 250 | Non-transient non-community | Groundwater |
| 4 | Melstone Town of | Musselshell | 170 | Community | Groundwater |
| 5 | Musselshell Community County Wsd | Musselshell | 75 | Community | Groundwater |
| 6 | Sunset Colony Unapproved | Musselshell | 75 | Community | Groundwater |
| 7 | Van Dykes Grocery Store - Sparkling Pure | Musselshell | 25 | Transient non-community | Purchased groundwater |
Musselshell County water systems: frequently asked questions
How many public water systems are in Musselshell County, Montana?
EPA's SDWIS records file 7 active public water systems under Musselshell County, Montana: 4 community systems (57%), 1 non-transient non-community systems (14%) and 2 transient non-community systems (29%).
Who supplies drinking water in Musselshell County, MT?
The largest community water systems filed under Musselshell County are Roundup Water Department (1,900 people served), Town of Melstone (170 people served) and Musselshell Community County Wsd (75 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Musselshell County's drinking water come from groundwater or surface water?
Of the 7 active public water systems in Musselshell County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Roundup Water Department, uses groundwater.
Where can I find a water quality report for Musselshell County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 4 community systems are filed under Musselshell County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Musselshell County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Montana water systems
- All Montana public water systems· 2,378 active
- Meagher County· 8 systems
- Judith Basin County· 8 systems
- Wheatland County· 8 systems
- Sheridan County· 8 systems
- Prairie County· 7 systems
- Bingham County· 6 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
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, “Public water systems in Musselshell County, Montana”, https://aquacensus.com/water-systems/montana/musselshell (data as of October 1, 2026).