SPEARFISH, SD · Lawrence County

WALNUT PARK 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): SD4600316
System type: Community Water System
Population served: 180
Service connections: 72
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2017 – June 9, 2017
Resolved
Failure To Address Deficiency
Health-based
Groundwater Rule
August 19, 2016 – August 26, 2019
Resolved
Treatment Technique No Certif. Operator
Health-based
Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2010 – June 7, 2010
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 17, 2007 – June 5, 2008
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 15, 2007 – June 5, 2008
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
July 14, 2007 – June 5, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
October 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2006 – March 31, 2006
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
May 1, 2017 – June 9, 2017	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
August 19, 2016 – August 26, 2019	Failure To Address Deficiency	Groundwater Rule	Health-based	Resolved
May 1, 2010 – June 7, 2010	Treatment Technique No Certif. Operator	Stage 1 Disinfectants and Disinfection Byproducts Rule	Health-based	Resolved
July 17, 2007 – June 5, 2008	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 15, 2007 – June 5, 2008	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
July 14, 2007 – June 5, 2008	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
October 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2006 – March 31, 2006	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

February 11, 2025State Compliance achieved3 linked violations
June 26, 2019State Public Notification received1 linked violation
July 1, 2018State Compliance achieved4 linked violations
June 5, 2018State Public Notification requested5 linked violations
May 30, 2018State Compliance achieved3 linked violations
June 9, 2017State Compliance achieved5 linked violations
June 5, 2017State Violation/Reminder Notice6 linked violations
April 28, 2016State Compliance achieved7 linked violations
June 5, 2008State Compliance achieved2 linked violations
June 5, 2008State Public Notification received4 linked violations
June 5, 2008State Public Notification received4 linked violations
June 5, 2008State Public Notification received3 linked violations
June 5, 2008State Compliance achieved1 linked violation
June 5, 2008State Compliance achieved1 linked violation
June 5, 2008State Compliance achieved1 linked violation
June 5, 2008State Compliance achieved2 linked violations
June 5, 2008State Compliance achieved1 linked violation
June 5, 2008State Compliance achieved1 linked violation
September 27, 2007State Compliance achieved7 linked violations
September 27, 2007State Compliance achieved3 linked violations
July 14, 2007State Public Notification issued13 linked violations
July 12, 2007State Public Notification issued4 linked violations
March 28, 2007State Administrative/Compliance Order without penalty issued9 linked violations
March 28, 2007State Administrative/Compliance Order without penalty issued26 linked violations
March 8, 2007State Public Notification issued3 linked violations
December 3, 2006State Public Notification issued16 linked violations
July 20, 2006State Compliance achieved5 linked violations
June 13, 2006State Public Notification requested4 linked violations

Contact

WALNUT PARK

Phone not on record

SPEARFISH, SD 57783