Douglas County, Colorado — public water systems

How does Douglas County compare with other Colorado counties?

Douglas County has the 11th-most active public water systems among the 113 counties listed for active Colorado systems in EPA records; among the 65 with 3 or more systems, the median has 18. Its systems report 421,335 people served in total, the 8th-largest county figure in the state and 5.6% of the statewide total. The average system here reports serving 5,694 people, about 67% above the Colorado average of 3,400. 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 Douglas County's drinking water come from?

By primary water source, Douglas County's active systems draw on groundwater (53, 72%), purchased surface water (11, 15%), groundwater under influence of surface water (6, 8.1%) and surface water (4, 5.4%). Overall, 80% rely mainly on groundwater (including purchased groundwater) and 20% on surface water, compared with 74% and 26% across Colorado. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Town of Castle Rock, draws primarily on surface water.

What kinds of water systems operate in Douglas County?

Douglas County's active systems break down as 29 community systems (39%), 14 non-transient non-community systems (19%) and 31 transient non-community systems (42%). 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 (61%), local government (34%), state government (2.7%) and federal government (2.7%).