Codington County, South Dakota — public water systems
At a glance
6 active public water systems are filed under Codington County, South Dakota in EPA's SDWIS records, together reporting 24,705 people served. The largest is Watertown Municipal Utilities, which reports serving 23,230 people. All 6 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
6
Population served
24.7K
Community systems
6
Groundwater share
100%
How does Codington County compare with other South Dakota counties?
Codington County has the 28th-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 24,705 people served in total, the 9th-largest county figure in the state and 2.5% of the statewide total. The average system here reports serving 4,118 people, about 197% above 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 Codington County's drinking water come from?
By primary water source, Codington County's active systems draw on purchased groundwater (3, 50%) and groundwater (3, 50%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 76% and 24% across South Dakota. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. The county's largest system, Watertown Municipal Utilities, draws primarily on groundwater.
What kinds of water systems operate in Codington County?
Codington County's active systems break down as 6 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 (83%) and private (17%).
Water systems in Codington County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Watertown Municipal Utilities | Codington | 23,230 | Community | Groundwater |
| 2 | Clark Rural Water-Kampeska | Codington + 1 more | 602 | Community | Groundwater |
| 3 | Florence | Codington | 337 | Community | Purchased groundwater |
| 4 | Henry | Codington | 256 | Community | Purchased groundwater |
| 5 | South Shore | Codington | 189 | Community | Groundwater |
| 6 | Wallace | Codington | 91 | Community | Purchased groundwater |
Also serving Codington County
These systems serve several counties, including Codington County. EPA lists another county first for them, so they are not included in the counts above.
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Grant-Roberts Rural Water System | Grant + 2 more | 5,050 | Community | Groundwater |
| Sioux Rural Water System | Hamlin + 3 more | 4,280 | Community | Groundwater |
| Clark Rural Water System | Clark + 3 more | 2,325 | Community | Groundwater |
Codington County water systems: frequently asked questions
How many public water systems are in Codington County, South Dakota?
EPA's SDWIS records file 6 active public water systems under Codington County, South Dakota: 6 community systems (100%). At least 3 more systems are listed under another county but also serve Codington County.
Who supplies drinking water in Codington County, SD?
The largest community water systems filed under Codington County are Watertown Municipal Utilities (23,230 people served), Clark Rural Water-Kampeska (602 people served) and Florence (337 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 Codington County's drinking water come from groundwater or surface water?
Of the 6 active public water systems in Codington County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Watertown Municipal Utilities, uses groundwater.
Where can I find a water quality report for Codington 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. 6 community systems are filed under Codington 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 Codington 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 Codington County, South Dakota”, https://aquacensus.com/water-systems/south-dakota/codington (data as of October 1, 2026).