Stillwater County, Montana — public water systems

How does Stillwater County compare with other Montana counties?

Stillwater County has the 18th-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 8,352 people served in total, the 26th-largest county figure in the state and 0.7% of the statewide total. The average system here reports serving 278 people, about 43% 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 Stillwater County's drinking water come from?

By primary water source, Stillwater County's active systems draw on groundwater (27, 90%), purchased groundwater (2, 6.7%) and groundwater under influence of surface water (1, 3.3%). 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 Columbus, draws primarily on groundwater.

What kinds of water systems operate in Stillwater County?

Stillwater County's active systems break down as 7 community systems (23%), 3 non-transient non-community systems (10%) and 20 transient non-community systems (67%). 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 (70%), local government (17%), state government (6.7%) and federal government (6.7%).