Public water system · SD4600881
ActiveClark Rural Water System
At a glance
Clark Rural Water System (PWSID SD4600881) is an active community water system serving Clark, Codington, Day and Hamlin counties, South Dakota. It reports serving 2,325 people through 1,080 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2011.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,325
Service connections
1,080
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Clark Rural Water System compare with other water systems in South Dakota?
By EPA's size categories, Clark Rural Water System is a small system (501 to 3,300 people). Across South Dakota, the 699 active systems average 1,387 people each. Nationally, the average active community water system reports serving 6,703 people, so Clark Rural Water System is about 65% below that figure.
What does “community water system” mean?
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. South Dakota has 510 active community water systems, 73% of the state's 699 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 431 South Dakota systems (62%) list groundwater as their primary source.
Who owns and regulates Clark Rural Water System?
EPA lists Clark Rural Water System as privately owned. The SD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act.
Does Clark Rural Water System have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2011. The violations listed here began between January 1996 and December 2011. By type: 10 monitoring and reporting, 1 public notice, recordkeeping or other and 1 required treatment not met. The contaminants or rules involved are Acrylamide, Endrin, Polychlorinated biphenyls (PCBs), total and Aldicarb sulfone. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2011-12-19 | Public notice, recordkeeping or otherSanitary Survey (TCR) · code 28 | Not reported | No | Resolved |
| 2004-01-01 | Required treatment not metTreatment Techniques · code 07 | Acrylamidecode 2265 | Yes | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Endrincode 2005 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfonecode 2044 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Lindane (gamma-BHC)code 2010 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4,5-TP (Silvex)code 2110 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dalaponcode 2031 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Pentachlorophenolcode 2326 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Picloramcode 2040 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Atrazinecode 2050 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Heptachlor epoxidecode 2067 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Clark Rural Water System: frequently asked questions
Who runs Clark Rural Water System?
Clark Rural Water System (PWSID SD4600881) is a community water system privately owned. It is regulated by the SD state drinking water program.
How many people does Clark Rural Water System serve?
Clark Rural Water System reports serving 2,325 people through 1,080 service connections in Clark, Codington, Day and Hamlin counties, South Dakota.
Where does Clark Rural Water System get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Clark Rural Water System have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2011. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Clark Rural Water System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2011. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Clark Rural Water System's water quality report?
As a community water system, Clark Rural Water System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Clark County(the first county EPA lists for this system)
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Clark | Clark | 1,148 | Community | Purchased groundwater |
| Willow Lake | Clark | 255 | Community | Purchased groundwater |
| Fordham Colony | Clark | 142 | Community | Groundwater |
| Collins Colony | Clark | 95 | Community | Groundwater |
| Shamrock Colony | Clark | 75 | Community | Groundwater |
| Garden City | Clark | 33 | Community | Purchased groundwater |
Related pages
- All water systems in Clark County· 7 active
- All water systems in Codington County· 6 active
- All water systems in Day County· 6 active
- All water systems in Hamlin County· 6 active
- All South Dakota public water systems· 699 active
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
- What a drinking water violation notice means
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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, “Clark Rural Water System, PWSID SD4600881, South Dakota”, https://aquacensus.com/water-systems/south-dakota/clark-rural-water-system-sd4600881 (data as of October 1, 2026).