COSMOS MYSTERY AREA

South Dakota — Transient Non-Community — PWSID: SD4602305

System Information

PWSID	SD4602305
System Name	COSMOS MYSTERY AREA
System Type	Transient Non-Community
Water Source	Ground Water
Activity Status	Active
Owner Type	Private
EPA Region	08
Serves School	No
Wholesaler	No
First Reported	Jul 27, 2010
Last Reported	Dec 9, 2025

Location & Contact

State	South Dakota
City	RAPID CITY
ZIP Code	57702
Address	24040 COSMOS ROAD
Organization	COSMOS MYSTERY AREA
Phone	6053439802

Population & Service

Population Served	600
Service Connections	1

Drinking Water Violations (48)

This water system has 48 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jul 1, 2021	Jul 31, 2021	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jul 31, 2021	Revised Total Coliform Rule
Jul 1, 2021	Jul 31, 2021	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jul 31, 2021	Revised Total Coliform Rule
Aug 1, 2018	Aug 31, 2018	Revised Total Coliform Rule	MCL	Yes	No	—	—	—	Resolved	Aug 31, 2018	Revised Total Coliform Rule
Aug 1, 2018	Aug 31, 2018	Revised Total Coliform Rule	MCL	Yes	No	—	—	—	Resolved	Aug 31, 2018	Revised Total Coliform Rule
Aug 1, 2018	Aug 31, 2018	Revised Total Coliform Rule	MCL	Yes	No	—	—	—	Resolved	Aug 31, 2018	Revised Total Coliform Rule
Sep 5, 2017	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Sep 12, 2017	Ground Water Rule
Sep 5, 2017	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Sep 12, 2017	Ground Water Rule
Sep 5, 2017	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Sep 12, 2017	Ground Water Rule
Aug 12, 2017	—	Public Notice	Other	No	No	—	—	—	Resolved	Sep 22, 2017	Public Notice Rule and Revised PN Rule
Jul 1, 2016	Jul 31, 2016	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jul 31, 2016	Revised Total Coliform Rule
Jul 1, 2016	Jul 31, 2016	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jul 31, 2016	Revised Total Coliform Rule
Jul 1, 2016	Jul 31, 2016	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jul 31, 2016	Revised Total Coliform Rule
Jul 1, 2016	Jul 31, 2016	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Jul 31, 2016	Revised Total Coliform Rule
Oct 1, 2013	Oct 31, 2013	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2013	Total Coliform Rule
Oct 1, 2013	Oct 31, 2013	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2013	Total Coliform Rule
Oct 3, 2011	—	Public Notice	Other	No	No	—	—	—	Resolved	Apr 10, 2012	Public Notice Rule and Revised PN Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 23, 2011	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Oct 31, 2011	Ground Water Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
May 1, 2011	May 31, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	May 31, 2011	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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