Corson County, South Dakota — public water systems
At a glance
3 active public water systems are filed under Corson County, South Dakota in EPA's SDWIS records, together reporting 727 people served. The largest is Mclaughlin, which reports serving 569 people. All 3 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
3
Population served
727
Community systems
3
Groundwater share
66.7%
How does Corson County compare with other South Dakota counties?
Corson County has the 48th-most active public water systems among the 73 counties listed for active South Dakota systems in EPA records; among the 48 with 3 or more systems, the median has 6. Its systems report 727 people served in total, the 57th-largest county figure in the state and less than 0.1% of the statewide total. The average system here reports serving 242 people, well below the South Dakota average of 1,387. 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 Corson County's drinking water come from?
By primary water source, Corson County's active systems draw on groundwater (2, 67%) and purchased surface water (1, 33%). Overall, 67% rely mainly on groundwater (including purchased groundwater) and 33% on surface water, compared with 76% and 24% across South Dakota. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Mclaughlin, draws primarily on purchased surface water.
What kinds of water systems operate in Corson County?
Corson County's active systems break down as 3 community systems (100%). 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. EPA lists their owner types as local government (100%).
Water systems in Corson County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Mclaughlin | Corson | 569 | Community | Purchased surface water |
| 2 | Mcintosh | Corson | 111 | Community | Groundwater |
| 3 | Morristown | Corson | 47 | Community | Groundwater |
Corson County water systems: frequently asked questions
How many public water systems are in Corson County, South Dakota?
EPA's SDWIS records file 3 active public water systems under Corson County, South Dakota: 3 community systems (100%).
Who supplies drinking water in Corson County, SD?
The largest community water systems filed under Corson County are Mclaughlin (569 people served), Mcintosh (111 people served) and Morristown (47 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 Corson County's drinking water come from groundwater or surface water?
Of the 3 active public water systems in Corson County, 67% draw mainly on groundwater and 33% on surface water, counting purchased supplies. The largest system, Mclaughlin, uses purchased surface water.
Where can I find a water quality report for Corson 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. 3 community systems are filed under Corson 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 Corson 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 South Dakota 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 Corson County, South Dakota”, https://aquacensus.com/water-systems/south-dakota/corson (data as of October 1, 2026).