Richland County, Illinois — public water systems
At a glance
9 active public water systems are filed under Richland County, Illinois in EPA's SDWIS records, together reporting 11,075 people served. The largest is Olney, which reports serving 8,877 people. 7 are community water systems serving people where they live; the other 2 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
9
Population served
11.1K
Community systems
7
Groundwater share
33.3%
How does Richland County compare with other Illinois counties?
Richland County has the 82nd-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 11,075 people served in total, the 81st-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 1,231 people, about 62% 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 Richland County's drinking water come from?
By primary water source, Richland County's active systems draw on purchased surface water (5, 56%), groundwater (3, 33%) and surface water (1, 11%). Overall, 33% rely mainly on groundwater (including purchased groundwater) and 67% on surface water, compared with 82% and 18% across Illinois. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, Olney, draws primarily on surface water.
What kinds of water systems operate in Richland County?
Richland County's active systems break down as 7 community systems (78%) and 2 transient non-community systems (22%). 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 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 local government (67%) and private (33%).
Water systems in Richland County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Olney | Richland | 8,877 | Community | Surface water |
| 2 | Noble | Richland | 805 | Community | Purchased surface water |
| 3 | West Liberty-Dundas Water District | Richland | 563 | Community | Purchased surface water |
| 4 | Parkersburg | Richland | 356 | Community | Purchased surface water |
| 5 | Claremont | Richland | 190 | Community | Groundwater |
| 6 | Calhoun | Richland | 172 | Community | Groundwater |
| 7 | Acorn Acres MHP | Richland | 52 | Community | Purchased surface water |
| 8 | Lakeside Rv Park | Richland | 35 | Transient non-community | Groundwater |
| 9 | Icehouse Olney | Richland | 25 | Transient non-community | Purchased surface water |
Richland County water systems: frequently asked questions
How many public water systems are in Richland County, Illinois?
EPA's SDWIS records file 9 active public water systems under Richland County, Illinois: 7 community systems (78%) and 2 transient non-community systems (22%).
Who supplies drinking water in Richland County, IL?
The largest community water systems filed under Richland County are Olney (8,877 people served), Noble (805 people served) and West Liberty-Dundas Water District (563 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 Richland County's drinking water come from groundwater or surface water?
Of the 9 active public water systems in Richland County, 33% draw mainly on groundwater and 67% on surface water, counting purchased supplies. The largest system, Olney, uses surface water.
Where can I find a water quality report for Richland 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. 7 community systems are filed under Richland 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 Richland 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 Illinois water systems
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 Richland County, Illinois”, https://aquacensus.com/water-systems/illinois/richland (data as of October 1, 2026).