RAPID CITY, SD · Pennington County

SIPHON HILL WATER ASSOCIATION 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): SD4600272
System type: Community Water System
Population served: 68
Service connections: 29
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
February 1, 2005 – February 9, 2007
Resolved
Notification, Public
—
Lead and Copper Rule
February 13, 2000 – March 12, 2000
Archived
Notification, Public
—
Coliform (TCR)
November 14, 1999 – December 13, 1999
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 1999 – September 30, 1999
Archived
Notification, Public
—
Lead and Copper Rule
February 9, 1999 – March 8, 1999
Archived
Monitoring, Regular
—
Styrene
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1999 – December 31, 1999
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
January 1, 1999 – July 26, 2000
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Regular
—
Toluene
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Regular
—
Benzene
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 1999 – December 31, 1999
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 1998 – October 31, 1998
Archived
Notification, Public
—
Coliform (TCR)
July 10, 1998 – August 9, 1998
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1998 – May 31, 1998
Archived
Monitoring, Regular
—
Nitrate
January 1, 1998 – March 31, 1998
Resolved
Monitoring, Regular
—
Toluene
July 1, 1997 – September 30, 1997
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 1997 – September 30, 1997
Resolved
Monitoring, Regular
—
Benzene
July 1, 1997 – September 30, 1997
Resolved
Monitoring, Regular
—
Styrene
July 1, 1997 – September 30, 1997
Resolved
Monitoring, Regular
—
Vinyl chloride
July 1, 1997 – September 30, 1997
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 1997 – September 30, 1997
Resolved
Monitoring, Regular
—
Toluene
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
Benzene
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
Xylenes, Total
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 1997 – June 30, 1997
Resolved
Monitoring, Regular
—
Vinyl chloride
April 1, 1997 – June 30, 1997
Resolved
Notification, Public
—
Coliform (TCR)
March 8, 1997 – April 7, 1997
Archived
Notification, Public
—
No contaminant on record
February 12, 1997 – March 11, 1997
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
January 1, 1997 – January 31, 1997
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 1996 – December 31, 1996
Archived
Notification, Public
—
No contaminant on record
November 11, 1996 – December 10, 1996
Archived
Monitoring, Regular
—
Trichloroethylene
October 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Ethylbenzene
October 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Xylenes, Total
October 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
CHLOROBENZENE
October 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
October 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
October 1, 1996 – December 31, 1996
Resolved
Notification, Public
—
No contaminant on record
September 17, 1996 – October 16, 1996
Archived
Notification, Public
—
Coliform (TCR)
August 17, 1996 – September 16, 1996
Archived
Monitoring, Regular
—
CHLOROBENZENE
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Xylenes, Total
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Ethylbenzene
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 1996 – September 30, 1996
Resolved
Monitoring, Regular
—
Trichloroethylene
July 1, 1996 – September 30, 1996
Resolved
Notification, Public
—
No contaminant on record
April 16, 1996 – May 15, 1996
Archived
Monitoring, Regular
—
o-Dichlorobenzene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
1,2,4-Trichlorobenzene
April 1, 1996 – June 30, 1996
Resolved
Monitoring, Regular
—
Ethylbenzene
January 1, 1996 – March 31, 1996
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
2,4-D
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
2,4,5-TP
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Dalapon
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Carbofuran
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Aldicarb sulfone
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Aldicarb
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Toxaphene
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
BHC-GAMMA
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Endrin
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Heptachlor epoxide
January 1, 1996 – December 31, 1998
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 1996 – March 31, 1996
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
October 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 1995 – December 31, 1995
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
July 1, 1995 – September 30, 1995
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 1995 – September 30, 1995
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 1995 – September 30, 1995
Resolved
Monitoring, Regular
—
Styrene
July 1, 1995 – September 30, 1995
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 1995 – June 30, 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
February 1, 2005 – February 9, 2007	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
February 13, 2000 – March 12, 2000	Notification, Public	Lead and Copper Rule	—	Archived
November 14, 1999 – December 13, 1999	Notification, Public	Coliform (TCR)	—	Archived
September 1, 1999 – September 30, 1999	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
February 9, 1999 – March 8, 1999	Notification, Public	Lead and Copper Rule	—	Archived
January 1, 1999 – December 31, 1999	Monitoring, Regular	Styrene	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 1999 – July 26, 2000	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	Toluene	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	Benzene	—	Resolved
January 1, 1999 – December 31, 1999	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 1998 – October 31, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
July 10, 1998 – August 9, 1998	Notification, Public	Coliform (TCR)	—	Archived
May 1, 1998 – May 31, 1998	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1998 – March 31, 1998	Monitoring, Regular	Nitrate	—	Resolved
July 1, 1997 – September 30, 1997	Monitoring, Regular	Toluene	—	Resolved
July 1, 1997 – September 30, 1997	Monitoring, Regular	Trichloroethylene	—	Resolved
July 1, 1997 – September 30, 1997	Monitoring, Regular	Benzene	—	Resolved
July 1, 1997 – September 30, 1997	Monitoring, Regular	Styrene	—	Resolved
July 1, 1997 – September 30, 1997	Monitoring, Regular	Vinyl chloride	—	Resolved
July 1, 1997 – September 30, 1997	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	Toluene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	Benzene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	Xylenes, Total	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 1997 – June 30, 1997	Monitoring, Regular	Vinyl chloride	—	Resolved
March 8, 1997 – April 7, 1997	Notification, Public	Coliform (TCR)	—	Archived
February 12, 1997 – March 11, 1997	Notification, Public	—	—	Archived
January 1, 1997 – January 31, 1997	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
December 1, 1996 – December 31, 1996	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
November 11, 1996 – December 10, 1996	Notification, Public	—	—	Archived
October 1, 1996 – December 31, 1996	Monitoring, Regular	Trichloroethylene	—	Resolved
October 1, 1996 – December 31, 1996	Monitoring, Regular	Ethylbenzene	—	Resolved
October 1, 1996 – December 31, 1996	Monitoring, Regular	Xylenes, Total	—	Resolved
October 1, 1996 – December 31, 1996	Monitoring, Regular	CHLOROBENZENE	—	Resolved
October 1, 1996 – December 31, 1996	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
October 1, 1996 – December 31, 1996	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
October 1, 1996 – December 31, 1996	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
September 17, 1996 – October 16, 1996	Notification, Public	—	—	Archived
August 17, 1996 – September 16, 1996	Notification, Public	Coliform (TCR)	—	Archived
July 1, 1996 – September 30, 1996	Monitoring, Regular	CHLOROBENZENE	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Xylenes, Total	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Ethylbenzene	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	1,2-Dichloroethane	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
July 1, 1996 – September 30, 1996	Monitoring, Regular	Trichloroethylene	—	Resolved
April 16, 1996 – May 15, 1996	Notification, Public	—	—	Archived
April 1, 1996 – June 30, 1996	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
April 1, 1996 – June 30, 1996	Monitoring, Regular	1,2,4-Trichlorobenzene	—	Resolved
January 1, 1996 – March 31, 1996	Monitoring, Regular	Ethylbenzene	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Pentachlorophenol	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	2,4-D	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	2,4,5-TP	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Dalapon	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Carbofuran	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Aldicarb sulfone	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Aldicarb	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Toxaphene	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	BHC-GAMMA	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Endrin	—	Resolved
January 1, 1996 – December 31, 1998	Monitoring, Regular	Heptachlor epoxide	—	Resolved
January 1, 1996 – March 31, 1996	Monitoring, Regular	Xylenes, Total	—	Resolved
October 1, 1995 – December 31, 1995	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
October 1, 1995 – December 31, 1995	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
July 1, 1995 – September 30, 1995	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
July 1, 1995 – September 30, 1995	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
July 1, 1995 – September 30, 1995	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
July 1, 1995 – September 30, 1995	Monitoring, Regular	Styrene	—	Resolved
April 1, 1995 – June 30, 1995	Monitoring, Regular	p-Dichlorobenzene	—	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 27, 2015State Compliance achieved1 linked violation
March 6, 2015State Violation/Reminder Notice1 linked violation
October 17, 2011State Compliance achieved4 linked violations
February 9, 2007State Compliance achieved1 linked violation
August 1, 2001State Intentional no-action2 linked violations
April 18, 2001State Public Notification requested2 linked violations
March 13, 2000State Public Notification issued1 linked violation
November 9, 1999State Public Notification issued17 linked violations
April 20, 1999State Public Notification requested35 linked violations
March 29, 1999State Compliance achieved2 linked violations
January 21, 1999State Public Notification requested9 linked violations
June 11, 1998State Public Notification requested4 linked violations
September 30, 1997State Compliance achieved2 linked violations
July 2, 1997State Public Notification requested24 linked violations
March 12, 1997State Compliance achieved148 linked violations
February 20, 1997State Public Notification issued7 linked violations
January 14, 1997State Public Notification issued8 linked violations
December 11, 1996State Public Notification requested5 linked violations
August 13, 1996State Public Notification issued3 linked violations
April 16, 1996State Public Notification issued33 linked violations
February 15, 1996State Public Notification requested5 linked violations

Contact

SIPHON HILL WATER ASSOCIATION

6053423175

RAPID CITY, SD 57702