BUFFALO GAP, SD · Custer County

BUFFALO GAP 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): SD4600077
System type: Community Water System
Population served: 126
Service connections: 93
Ownership: local government
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
December 1, 2023 – December 31, 2023
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
October 1, 2023 – October 31, 2023
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2023 – June 30, 2023
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2023 – March 31, 2023
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2018 – September 30, 2018
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
January 1, 2018 – February 28, 2019
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2018 – March 31, 2018
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
February 1, 2017 – March 29, 2017
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2016 – December 31, 2016
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
May 1, 2016 – May 31, 2016
Resolved
Sample Siting Plan Errors (RTCR)
—
Revised Total Coliform Rule
April 1, 2016 – July 18, 2016
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
April 1, 2016 – April 30, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2016 – March 31, 2016
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 16, 2016 – July 5, 2016
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
February 1, 2016 – July 29, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2016 – February 29, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 2016 – January 31, 2016
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2015 – December 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2015 – December 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2015 – March 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2014 – September 30, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
June 1, 2014 – June 30, 2014
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2014 – May 31, 2014
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2014 – June 30, 2014
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
February 1, 2014 – August 22, 2014
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2014 – March 31, 2014
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
February 1, 2011 – July 18, 2011
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 2, 2006 – January 19, 2007
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – August 3, 2006
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
May 2, 2006 – January 19, 2007
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 10, 2006 – January 19, 2007
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
January 9, 2006 – January 19, 2007
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2006 – March 31, 2006
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Uranium
January 1, 2006 – March 31, 2006
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Styrene
January 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2005 – December 31, 2005
Resolved
Monitoring, Regular
—
Nitrite
January 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2005 – December 31, 2005
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1998 – August 31, 1998
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 1998 – June 30, 1998
Resolved
Notification, Public
—
Coliform (TCR)
November 9, 1997 – December 8, 1997
Archived
Notification, Public
—
Coliform (TCR)
May 10, 1997 – June 9, 1997
Archived
Notification, Public
—
Coliform (TCR)
February 12, 1997 – March 11, 1997
Archived
Monitoring, Regular
—
Toluene
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Aldicarb sulfoxide
January 1, 1993 – December 31, 1995
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
July 1, 1976 – June 30, 1980
Archived
Monitoring, 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
December 1, 2023 – December 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
October 1, 2023 – October 31, 2023	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2023 – June 30, 2023	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2023 – March 31, 2023	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2018 – September 30, 2018	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2018 – February 28, 2019	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
January 1, 2018 – March 31, 2018	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
February 1, 2017 – March 29, 2017	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
October 1, 2016 – December 31, 2016	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
May 1, 2016 – May 31, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2016 – July 18, 2016	Sample Siting Plan Errors (RTCR)	Revised Total Coliform Rule	—	Resolved
April 1, 2016 – April 30, 2016	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
March 1, 2016 – March 31, 2016	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 16, 2016 – July 5, 2016	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
February 1, 2016 – July 29, 2016	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
February 1, 2016 – February 29, 2016	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2016 – January 31, 2016	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
December 1, 2015 – December 31, 2015	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2015 – December 31, 2015	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2015 – March 31, 2015	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2014 – September 30, 2014	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
June 1, 2014 – June 30, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 2014 – May 31, 2014	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2014 – June 30, 2014	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
February 1, 2014 – August 22, 2014	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
January 1, 2014 – March 31, 2014	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
February 1, 2011 – July 18, 2011	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
July 2, 2006 – January 19, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 1, 2006 – August 3, 2006	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
May 2, 2006 – January 19, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 10, 2006 – January 19, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 9, 2006 – January 19, 2007	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2006 – March 31, 2006	Maximum Contaminant Level Violation, Average	Combined Uranium	Health-based	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Styrene	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
October 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Nitrite	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
August 1, 1998 – August 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
June 1, 1998 – June 30, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
November 9, 1997 – December 8, 1997	Notification, Public	Coliform (TCR)	—	Archived
May 10, 1997 – June 9, 1997	Notification, Public	Coliform (TCR)	—	Archived
February 12, 1997 – March 11, 1997	Notification, Public	Coliform (TCR)	—	Archived
January 1, 1996 – December 31, 1996	Monitoring, Regular	Toluene	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 1993 – December 31, 1995	Monitoring, Regular	Aldicarb sulfoxide	—	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

October 31, 2025State Public Notification requested2 linked violations
July 7, 2025State Violation/Reminder Notice1 linked violation
August 7, 2024State Compliance achieved2 linked violations
April 10, 2024State Compliance achieved14 linked violations
April 10, 2024State Compliance achieved1 linked violation
December 5, 2023State Public Notification requested5 linked violations
May 5, 2023State Public Notification requested4 linked violations
May 5, 2023State Public Notification requested2 linked violations
April 21, 2023State Public Notification requested2 linked violations
July 10, 2019State Compliance achieved3 linked violations
December 26, 2018State Public Notification received1 linked violation
December 26, 2018State Public Notification received5 linked violations
October 20, 2016State Compliance achieved1 linked violation
July 29, 2016State Compliance achieved1 linked violation
July 18, 2016State Compliance achieved2 linked violations
July 18, 2016State Compliance achieved1 linked violation
July 18, 2016State Compliance achieved2 linked violations
July 18, 2016State Compliance achieved2 linked violations
July 18, 2016State Compliance achieved1 linked violation
July 18, 2016State Compliance achieved1 linked violation
July 18, 2016State Compliance achieved1 linked violation
July 5, 2016State Public Notification received2 linked violations
June 9, 2016State Public Notification requested1 linked violation
May 10, 2016State Violation/Reminder Notice1 linked violation
May 10, 2016State Public Notification requested1 linked violation
April 5, 2016State Public Notification requested1 linked violation
March 10, 2016State Violation/Reminder Notice1 linked violation
March 8, 2016State Public Notification requested1 linked violation
March 8, 2016State Public Notification requested1 linked violation
January 22, 2016State Public Notification requested1 linked violation
January 15, 2016State Violation/Reminder Notice1 linked violation
January 15, 2016State Public Notification requested1 linked violation
April 17, 2015State Public Notification requested2 linked violations
February 5, 2015State Public Notification received2 linked violations
August 6, 2014State Public Notification requested5 linked violations
July 9, 2014State Public Notification received3 linked violations
June 9, 2014State Public Notification requested4 linked violations
June 6, 2014State Public Notification requested3 linked violations
June 30, 2009State Compliance achieved2 linked violations
June 30, 2009State Public Notification received3 linked violations
June 30, 2009State Public Notification received1 linked violation
April 2, 2008State Compliance achieved1 linked violation
April 2, 2008State Compliance achieved2 linked violations
April 2, 2008State Compliance achieved1 linked violation
July 14, 2007State Public Notification issued1 linked violation
July 13, 2007State Public Notification issued3 linked violations
January 30, 2007State Compliance achieved4 linked violations
January 19, 2007State Compliance achieved5 linked violations
January 19, 2007State Public Notification requested6 linked violations
January 19, 2007State Public Notification requested6 linked violations
January 19, 2007State Public Notification requested5 linked violations
January 19, 2007State Public Notification received4 linked violations
January 19, 2007State Public Notification requested7 linked violations
January 19, 2007State Compliance achieved6 linked violations
December 19, 2006State Public Notification requested2 linked violations
August 28, 2006State Administrative/Compliance Order with penalty issued3 linked violations
August 28, 2006State Administrative/Compliance Order with penalty issued6 linked violations
August 28, 2006State Administrative/Compliance Order with penalty issued2 linked violations
August 28, 2006State Administrative/Compliance Order with penalty issued2 linked violations
August 28, 2006State Administrative/Compliance Order with penalty issued1 linked violation
August 28, 2006State Administrative/Compliance Order with penalty issued1 linked violation
August 10, 2006State Compliance achieved1 linked violation
August 10, 2006State Compliance achieved1 linked violation
August 4, 2006State Public Notification requested1 linked violation
July 17, 2006State Intentional no-action1 linked violation
June 29, 2006State Compliance achieved1 linked violation
June 29, 2006State Compliance achieved6 linked violations
June 13, 2006State Public Notification requested1 linked violation
April 4, 2006State Public Notification issued2 linked violations
February 10, 2006State Public Notification issued5 linked violations
February 8, 2006State Public Notification issued2 linked violations
February 7, 2006State Public Notification issued1 linked violation
January 17, 2006State Public Notification received2 linked violations
January 10, 2006State Public Notification requested1 linked violation
November 10, 2005State Public Notification requested2 linked violations
June 23, 2005State Public Notification requested1 linked violation
February 8, 2005State Public Notification requested3 linked violations
October 26, 2004State Public Notification requested3 linked violations
March 12, 2002State Public Notification issued2 linked violations
January 10, 2002State Public Notification requested2 linked violations
August 10, 1998State Public Notification issued18 linked violations
June 11, 1998State Public Notification requested8 linked violations
June 5, 1997State Compliance achieved41 linked violations
February 12, 1997State Public Notification requested6 linked violations

Contact

BUFFALO GAP

Phone not on record

BUFFALO GAP, SD 57722