YANKTON, SD · Yankton County
YANKTON Water System
Consumer Confidence Report status
YANKTON must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for YANKTON.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace South Dakota’s official records. Always confirm current status with South Dakota before making decisions based on this information.
System facts
- System ID (PWSID)
- SD4600423
- System type
- Community Water System
- Population served
- 15,411
- Service connections
- 5,500
- Ownership
- local government
- Water source
- groundwater (wells)
YANKTON is among the 8 largest community water systems in South Dakota, serving 15,411 people from groundwater.
As of August 1, 2026, its federal record holds 4 entries between 1976 and 2020, all of which EPA lists as closed. Nothing has been added since 2020.
Of the 4, 2 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Radionuclides and Revised Rad Rule, the Stage 2 Disinfectants and Disinfection Byproducts Rule, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.
Violation history
Maximum Contaminant Level Violation, Average
Health-basedTTHM
January 1, 2020 – March 31, 2020
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTTHM
July 1, 2008 – September 30, 2008
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
July 1, 1976 – June 30, 1980
ArchivedMonitoring, Regular
—Combined Radium (-226 and -228)
July 1, 1976 – June 30, 1980
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| January 1, 2020 – March 31, 2020 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| July 1, 2008 – September 30, 2008 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| July 1, 1976 – June 30, 1980 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
| July 1, 1976 – June 30, 1980 | Monitoring, Regular | Combined Radium (-226 and -228) | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- January 21, 2020State Public Notification received72 linked violations
Common questions
Is YANKTON required to publish a Consumer Confidence Report?
- Yes. YANKTON is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is YANKTON’s next Consumer Confidence Report due?
- YANKTON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does YANKTON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for YANKTON.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
YANKTON
6056685272
YANKTON, SD 57078