MADISON, SD · Lake County
MADISON Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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)
- SD4600199
- System type
- Community Water System
- Population served
- 6,191
- Service connections
- 2,687
- Ownership
- local government
- Water source
- groundwater (wells)
Violation history
Maximum Contaminant Level Violation, Average
Health-basedTTHM
January 1, 2013 – March 31, 2013
ResolvedMaximum Contaminant Level Violation, Average
Health-basedTTHM
July 1, 2012 – September 30, 2012
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, 2013 – March 31, 2013 | Maximum Contaminant Level Violation, Average | TTHM | Health-based | Resolved |
| July 1, 2012 – September 30, 2012 | 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 1, 2014State Intentional no-action115 linked violations
- August 20, 2013State Compliance achieved34 linked violations
- October 4, 2012State Public Notification received53 linked violations
Contact
MADISON
6052567515
MADISON, SD 57042