BISON, SD · Perkins County
BISON Water System
Consumer Confidence Report status
BISON 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 BISON.
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)
- SD4600039
- System type
- Community Water System
- Population served
- 310
- Service connections
- 228
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
BISON is one of 583 community water systems in South Dakota in the 500 or fewer people size category, serving 310 people from surface water.
As of August 1, 2026, its federal record holds 4 entries between 1976 and 2015, all of which EPA lists as closed. Nothing has been added since 2015.
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, the Stage 2 Disinfectants and Disinfection Byproducts Rule, and the Stage 1 Disinfectants and Disinfection Byproducts Rule.
Violation history
Monitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
August 1, 2015 – September 30, 2015
ResolvedMonitoring and Reporting (DBP)
—Chlorine
October 1, 2010 – December 31, 2010
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 |
|---|---|---|---|---|
| August 1, 2015 – September 30, 2015 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| October 1, 2010 – December 31, 2010 | Monitoring and Reporting (DBP) | Chlorine | — | 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
- December 19, 2024State Compliance achieved20 linked violations
- October 31, 2016State Public Notification received19 linked violations
Common questions
Is BISON required to publish a Consumer Confidence Report?
- Yes. BISON 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 BISON’s next Consumer Confidence Report due?
- BISON’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does BISON have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for BISON.
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
BISON
6052445677
BISON, SD 57620