TIMBER LAKE, SD · Dewey County
TIMBER LAKE Water System
Consumer Confidence Report status
TIMBER LAKE 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 TIMBER LAKE.
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)
- SD4600411
- System type
- Community Water System
- Population served
- 499
- Service connections
- 210
- Ownership
- local government
- Water source
- groundwater (wells)
TIMBER LAKE is one of 583 community water systems in South Dakota in the 500 or fewer people size category, serving 499 people from groundwater.
As of August 1, 2026, its federal record holds 14 entries between 1976 and 2012, all of which EPA lists as closed. Nothing has been added since 2012.
Of the 14, 13 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 synthetic organic chemicals, volatile organic chemicals, and the Radionuclides and Revised Rad Rule.
Violation history
Treatment Technique No Certif. Operator
Health-basedStage 1 Disinfectants and Disinfection Byproducts Rule
November 26, 2012 – August 8, 2013
ResolvedMonitoring, Regular
—Toluene
January 1, 2012 – March 31, 2012
ResolvedMonitoring, Regular
—cis-1,2-Dichloroethylene
January 1, 2012 – March 31, 2012
ResolvedMonitoring, Regular
—DICHLOROMETHANE
January 1, 2012 – March 31, 2012
ResolvedMonitoring, Regular
—1,2-Dichloropropane
January 1, 2012 – March 31, 2012
ResolvedMonitoring, Regular
—Dinoseb
April 1, 2011 – June 30, 2011
ResolvedMonitoring, Regular
—Pentachlorophenol
April 1, 2011 – June 30, 2011
ResolvedMonitoring, Regular
—Total Polychlorinated Biphenyls (PCB)
April 1, 2011 – June 30, 2011
ResolvedMonitoring, Regular
—Di(2-ethylhexyl) adipate
April 1, 2011 – June 30, 2011
ResolvedMonitoring, Regular
—HEXACHLOROBENZENE
April 1, 2011 – June 30, 2011
ResolvedMonitoring, Regular
—Benzene
January 1, 2011 – March 31, 2011
ResolvedMonitoring, Regular
—Carbofuran
January 1, 2011 – March 31, 2011
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 |
|---|---|---|---|---|
| November 26, 2012 – August 8, 2013 | Treatment Technique No Certif. Operator | Stage 1 Disinfectants and Disinfection Byproducts Rule | Health-based | Resolved |
| January 1, 2012 – March 31, 2012 | Monitoring, Regular | Toluene | — | Resolved |
| January 1, 2012 – March 31, 2012 | Monitoring, Regular | cis-1,2-Dichloroethylene | — | Resolved |
| January 1, 2012 – March 31, 2012 | Monitoring, Regular | DICHLOROMETHANE | — | Resolved |
| January 1, 2012 – March 31, 2012 | Monitoring, Regular | 1,2-Dichloropropane | — | Resolved |
| April 1, 2011 – June 30, 2011 | Monitoring, Regular | Dinoseb | — | Resolved |
| April 1, 2011 – June 30, 2011 | Monitoring, Regular | Pentachlorophenol | — | Resolved |
| April 1, 2011 – June 30, 2011 | Monitoring, Regular | Total Polychlorinated Biphenyls (PCB) | — | Resolved |
| April 1, 2011 – June 30, 2011 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Resolved |
| April 1, 2011 – June 30, 2011 | Monitoring, Regular | HEXACHLOROBENZENE | — | Resolved |
| January 1, 2011 – March 31, 2011 | Monitoring, Regular | Benzene | — | Resolved |
| January 1, 2011 – March 31, 2011 | Monitoring, Regular | Carbofuran | — | 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
- April 24, 2012State Compliance achieved10 linked violations
- April 24, 2012State Compliance achieved16 linked violations
- April 24, 2012State Compliance achieved8 linked violations
- April 24, 2012State Compliance achieved19 linked violations
- April 24, 2012State Compliance achieved19 linked violations
- April 11, 2012State Compliance achieved28 linked violations
- April 10, 2012State Public Notification requested44 linked violations
Common questions
Is TIMBER LAKE required to publish a Consumer Confidence Report?
- Yes. TIMBER LAKE 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 TIMBER LAKE’s next Consumer Confidence Report due?
- TIMBER LAKE’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does TIMBER LAKE have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for TIMBER LAKE.
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
TIMBER LAKE
6058653790
TIMBER LAKE, SD 57656