EGAN, SD · Moody County
BIG SIOUX COMMUNITY WATER SYSTEM Water System
Consumer Confidence Report status
BIG SIOUX COMMUNITY WATER SYSTEM 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 BIG SIOUX COMMUNITY WATER SYSTEM.
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)
- SD4600429
- System type
- Community Water System
- Population served
- 5,800
- Service connections
- 2,330
- Ownership
- privately owned
- Water source
- groundwater (wells)
BIG SIOUX COMMUNITY WATER SYSTEM is one of 30 community water systems in South Dakota in the 3,301 to 10,000 people size category, serving 5,800 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries in 1976, all of which EPA lists as closed. Nothing has been added since 1976.
All 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.
Violation history
Monitoring, 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
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| 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 |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- November 12, 2021State Public Notification received7 linked violations
Common questions
Is BIG SIOUX COMMUNITY WATER SYSTEM required to publish a Consumer Confidence Report?
- Yes. BIG SIOUX COMMUNITY WATER SYSTEM 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 BIG SIOUX COMMUNITY WATER SYSTEM’s next Consumer Confidence Report due?
- BIG SIOUX COMMUNITY WATER SYSTEM’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does BIG SIOUX COMMUNITY WATER SYSTEM have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for BIG SIOUX COMMUNITY WATER SYSTEM.
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
BIG SIOUX COMMUNITY WATER SYSTEM
6059972098
EGAN, SD 57024