Twin Falls County, Idaho — public water systems

How does Twin Falls County compare with other Idaho counties?

Twin Falls County has the 13th-most active public water systems among the 64 counties listed for active Idaho systems in EPA records; among the 47 with 3 or more systems, the median has 27. Its systems report 76,088 people served in total, the 6th-largest county figure in the state and 4.3% of the statewide total. The average system here reports serving 1,409 people, about 57% above the Idaho average of 899. 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 Twin Falls County's drinking water come from?

By primary water source, Twin Falls County's active systems draw on groundwater (53, 98%) and purchased groundwater (1, 1.9%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 96% and 4.1% across Idaho. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, City of Twin Falls, draws primarily on groundwater.

What kinds of water systems operate in Twin Falls County?

Twin Falls County's active systems break down as 13 community systems (24%), 9 non-transient non-community systems (17%) and 32 transient non-community systems (59%). 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 (67%), local government (30%) and federal government (3.7%).