Public water system · SD4600310
ActiveSisseton
At a glance
Sisseton (PWSID SD4600310) is an active community water system in Roberts County, South Dakota. It reports serving 2,479 people through 950 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; none is health-based, and the most recent began in August 1998.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,479
Service connections
950
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sisseton compare with other water systems in Roberts County?
By EPA's size categories, Sisseton is a small system (501 to 3,300 people). Roberts County has 11 active public water systems, and Sisseton is the largest of them by population served. Its population served is about 4.4 times the county average of 565 people per system, and accounts for 40% of the 6,217 people reported by systems filed under the county. 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 Sisseton is about 63% 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 Sisseton?
EPA lists Sisseton as owned by a local government. 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. 7 of the 11 active systems in Roberts County (64%) are also owned by a local government.
Does Sisseton have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in August 1998. The violations listed here began between July 1976 and August 1998. By type: 4 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 5 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1998-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1995-01-09 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1994-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
All 5 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.
Sisseton: frequently asked questions
Who runs Sisseton?
Sisseton (PWSID SD4600310) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Sisseton serve?
Sisseton reports serving 2,479 people through 950 service connections in Roberts County, South Dakota.
Where does Sisseton 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 Sisseton have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in August 1998. 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 Sisseton'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. EPA's records list 5 violations for this system; none is health-based, and the most recent began in August 1998. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Sisseton's water quality report?
As a community water system, Sisseton 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 Roberts County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dot Rest Area - Whetstone Valley | Roberts | 1,000 | Transient non-community | Groundwater |
| Dot Rest Area 119 - Glacial Lakes | Roberts | 1,000 | Transient non-community | Groundwater |
| Wilmot | Roberts | 432 | Community | Purchased groundwater |
| Rosholt | Roberts | 379 | Community | Groundwater |
| Summit | Roberts | 288 | Community | Groundwater |
| New Effington | Roberts | 247 | Community | Purchased groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Sisseton, PWSID SD4600310, South Dakota”, https://aquacensus.com/water-systems/south-dakota/sisseton-sd4600310 (data as of October 1, 2026).