JEFFERSON, SD · Union County
JEFFERSON Water System
Consumer Confidence Report status
JEFFERSON 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 JEFFERSON.
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)
- SD4600060
- System type
- Community Water System
- Population served
- 475
- Service connections
- 235
- Ownership
- local government
- Water source
- groundwater (wells)
JEFFERSON is one of 583 community water systems in South Dakota in the 500 or fewer people size category, serving 475 people from groundwater.
As of August 1, 2026, its federal record holds 4 entries between 1976 and 1994, all of which EPA lists as closed. Nothing has been added since 1994.
All 4 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, volatile organic chemicals, and inorganic chemicals.
Violation history
Monitoring, Regular
—Trichloroethylene
July 1, 1994 – September 30, 1994
ResolvedMonitoring, Regular
—Fluoride
January 10, 1990 – January 9, 1993
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 |
|---|---|---|---|---|
| July 1, 1994 – September 30, 1994 | Monitoring, Regular | Trichloroethylene | — | Resolved |
| January 10, 1990 – January 9, 1993 | Monitoring, Regular | Fluoride | — | 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
No enforcement actions on record for this system.
Common questions
Is JEFFERSON required to publish a Consumer Confidence Report?
- Yes. JEFFERSON 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 JEFFERSON’s next Consumer Confidence Report due?
- JEFFERSON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does JEFFERSON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for JEFFERSON.
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
JEFFERSON
6059665838
JEFFERSON, SD 57038