LaSalle County, Illinois — public water systems

How does LaSalle County compare with other Illinois counties?

LaSalle County has the 6th-most active public water systems among the 149 counties listed for active Illinois systems in EPA records; among the 104 with 3 or more systems, the median has 18. Its systems report 105,319 people served in total, the 16th-largest county figure in the state and 0.8% of the statewide total. The average system here reports serving 816 people, well below the Illinois average of 3,204. 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 LaSalle County's drinking water come from?

By primary water source, LaSalle County's active systems draw on groundwater (116, 90%), purchased groundwater (11, 8.5%), surface water (1, 0.8%) and purchased surface water (1, 0.8%). Overall, 98% rely mainly on groundwater (including purchased groundwater) and 1.6% on surface water, compared with 82% and 18% across Illinois. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Il American-Streator, draws primarily on surface water.

What kinds of water systems operate in LaSalle County?

LaSalle County's active systems break down as 35 community systems (27%), 19 non-transient non-community systems (15%) and 75 transient non-community systems (58%). 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 (77%), local government (16%), public/private partnership (4.7%) and state government (2.3%).