ISABEL, SD · Dewey County

ISABEL 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): SD4600175
System type: Community Water System
Population served: 145
Service connections: 135
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
November 1, 2015 – November 30, 2015
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2008 – September 30, 2008
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
January 1, 2004 – November 19, 2004
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
October 1, 1999 – December 31, 1999
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
April 1, 1997 – April 30, 1997
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
March 1, 1997 – March 31, 1997
Resolved
Monitoring, Regular
—
Combined Radium (-226 and -228)
July 1, 1976 – June 30, 1980
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
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 1, 2015 – November 30, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
September 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
January 1, 2004 – November 19, 2004	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
October 1, 1999 – December 31, 1999	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 1997 – April 30, 1997	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
March 1, 1997 – March 31, 1997	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
July 1, 1976 – June 30, 1980	Monitoring, Regular	Combined Radium (-226 and -228)	—	Archived
July 1, 1976 – June 30, 1980	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	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, 2016State Compliance achieved4 linked violations
April 1, 2009State Compliance achieved1 linked violation
December 11, 2008State Public Notification received1 linked violation
October 2, 2008State Public Notification requested1 linked violation
September 4, 2007State Public Notification requested2 linked violations
July 3, 2007State Compliance achieved7 linked violations
July 3, 2007State Compliance achieved5 linked violations
July 3, 2007State Public Notification received4 linked violations
June 26, 2006State Violation/Reminder Notice2 linked violations
April 19, 2004State Public Notification received4 linked violations
July 3, 2003State Compliance achieved5 linked violations
February 12, 2002State Public Notification received2 linked violations
February 12, 2002State Public Notification received1 linked violation
January 29, 2002State Compliance achieved2 linked violations
January 29, 2002State Compliance achieved3 linked violations
January 29, 2002State Compliance achieved4 linked violations
January 29, 2002State Compliance achieved2 linked violations
January 10, 2002State Public Notification requested3 linked violations
December 11, 2001State Compliance achieved3 linked violations
February 29, 2000State Compliance achieved25 linked violations
January 26, 2000State Public Notification requested25 linked violations
February 2, 1999State Compliance achieved52 linked violations
May 21, 1997State Public Notification received11 linked violations
March 25, 1997State Public Notification requested23 linked violations
January 5, 1996State Public Notification requested36 linked violations
November 17, 1994State Public Notification requested102 linked violations

Contact

ISABEL

6054662177

ISABEL, SD 57633