Judith Basin County, Montana — public water systems
At a glance
8 active public water systems are filed under Judith Basin County, Montana in EPA's SDWIS records, together reporting 1,069 people served. The largest is Town of Stanford, which reports serving 425 people. 4 are community water systems serving people where they live; the other 4 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
8
Population served
1.1K
Community systems
4
Groundwater share
100%
How does Judith Basin County compare with other Montana counties?
Judith Basin County has the 41st-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 1,069 people served in total, the 50th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 134 people, well 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 Judith Basin County's drinking water come from?
By primary water source, Judith Basin County's active systems draw on groundwater (8, 100%). 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, Town of Stanford, draws primarily on groundwater.
What kinds of water systems operate in Judith Basin County?
Judith Basin County's active systems break down as 4 community systems (50%), 1 non-transient non-community systems (13%) and 3 transient non-community systems (38%). 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 (50%), local government (38%) and state government (13%).
Water systems in Judith Basin County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Stanford Town of | Judith Basin | 425 | Community | Groundwater |
| 2 | Hobson School | Judith Basin | 150 | Non-transient non-community | Groundwater |
| 3 | Geyser Judith Basin Cty Water Sewer Dist | Judith Basin | 125 | Community | Groundwater |
| 4 | Hobson Town of | Judith Basin | 125 | Community | Groundwater |
| 5 | Surprise Creek Colony | Judith Basin | 80 | Community | Groundwater |
| 6 | Tall Boys Tavern | Judith Basin | 60 | Transient non-community | Groundwater |
| 7 | Full Curl Smokers | Judith Basin | 54 | Transient non-community | Groundwater |
| 8 | Oxen Yoke Inn Inc. Utica | Judith Basin | 50 | Transient non-community | Groundwater |
Judith Basin County water systems: frequently asked questions
How many public water systems are in Judith Basin County, Montana?
EPA's SDWIS records file 8 active public water systems under Judith Basin County, Montana: 4 community systems (50%), 1 non-transient non-community systems (13%) and 3 transient non-community systems (38%).
Who supplies drinking water in Judith Basin County, MT?
The largest community water systems filed under Judith Basin County are Town of Stanford (425 people served), Geyser Judith Basin Cty Water Sewer Dist (125 people served) and Town of Hobson (125 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 Judith Basin County's drinking water come from groundwater or surface water?
Of the 8 active public water systems in Judith Basin County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Town of Stanford, uses groundwater.
Where can I find a water quality report for Judith Basin 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 Judith Basin 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 Judith Basin 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
- Phillips County· 12 systems
- Custer County· 11 systems
- Liberty County· 8 systems
- Meagher County· 8 systems
- Wheatland County· 8 systems
- Sheridan County· 8 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 Judith Basin County, Montana”, https://aquacensus.com/water-systems/montana/judith-basin (data as of October 1, 2026).