LOUISVILLE, CO · Larimer County

PROSPECT MOUNTAIN WC Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of March 19, 2019. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Larimer County, CO.

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 Colorado’s official records. Always confirm current status with Colorado before making decisions based on this information.

System facts

System ID (PWSID): CO0135621
System type: Community Water System
Population served: 350
Service connections: 139
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Lead Consumer Notice
—
Lead and Copper Rule
December 31, 2016 – March 14, 2017
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2015 – November 3, 2015
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
June 1, 2009 – June 30, 2009
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
May 1, 2009 – May 31, 2009
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
February 1, 2006 – February 28, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
February 1, 2006 – February 28, 2006
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
December 1, 2005 – December 31, 2005
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
November 1, 2005 – November 30, 2005
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 2005 – October 31, 2005
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2005 – June 30, 2005
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
May 1, 2005 – May 31, 2005
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2005 – April 30, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
December 1, 2004 – December 31, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 1, 2003 – October 31, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2003 – May 31, 2003
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2003 – April 30, 2003
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Barium
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Cadmium
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Mercury
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Antimony, Total
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 2002 – December 31, 2002
Resolved
Monitoring, Regular
—
Vinyl chloride
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 2002 – December 31, 2004
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Thallium, Total
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Selenium
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Mercury
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
CYANIDE
January 1, 1996 – December 31, 1996
Resolved
Monitoring, Regular
—
Cadmium
January 1, 1996 – December 31, 1996
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
December 31, 2016 – March 14, 2017	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
January 1, 2015 – November 3, 2015	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
June 1, 2009 – June 30, 2009	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
May 1, 2009 – May 31, 2009	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
February 1, 2006 – February 28, 2006	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
February 1, 2006 – February 28, 2006	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
December 1, 2005 – December 31, 2005	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
November 1, 2005 – November 30, 2005	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
October 1, 2005 – October 31, 2005	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
June 1, 2005 – June 30, 2005	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
May 1, 2005 – May 31, 2005	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
April 1, 2005 – April 30, 2005	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
December 1, 2004 – December 31, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
October 1, 2003 – October 31, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
May 1, 2003 – May 31, 2003	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
April 1, 2003 – April 30, 2003	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Barium	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Cadmium	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Mercury	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Antimony, Total	—	Resolved
January 1, 2002 – December 31, 2002	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	Vinyl chloride	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
January 1, 2002 – December 31, 2004	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Beryllium, Total	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Thallium, Total	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Selenium	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Mercury	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	CYANIDE	—	Resolved
January 1, 1996 – December 31, 1996	Monitoring, Regular	Cadmium	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

March 14, 2017State Compliance achieved1 linked violation
February 10, 2017State Public Notification requested1 linked violation
February 10, 2017State Violation/Reminder Notice1 linked violation
November 3, 2015State Compliance achieved2 linked violations
October 9, 2015State Violation/Reminder Notice2 linked violations
October 9, 2015State Public Notification requested2 linked violations
August 14, 2014State Compliance achieved1 linked violation
June 13, 2013State Public Notification received1 linked violation
February 15, 2013State Public Notification requested1 linked violation
February 15, 2013State Violation/Reminder Notice1 linked violation
February 10, 2010State Violation/Reminder Notice2 linked violations
February 10, 2010State Violation/Reminder Notice2 linked violations
February 10, 2010State Public Notification requested2 linked violations
February 10, 2010State Violation/Reminder Notice4 linked violations
September 17, 2009State Public Notification received2 linked violations
August 28, 2009State Public Notification requested2 linked violations
August 25, 2009State Compliance achieved2 linked violations
July 31, 2009State Violation/Reminder Notice2 linked violations
August 25, 2008State Compliance achieved2 linked violations
April 7, 2008State Compliance achieved6 linked violations
February 5, 2008State Compliance achieved3 linked violations
February 1, 2008State Violation/Reminder Notice2 linked violations
February 12, 2007State Public Notification requested1 linked violation
February 12, 2007State Public Notification requested1 linked violation
February 12, 2007State Violation/Reminder Notice1 linked violation
February 12, 2007State Violation/Reminder Notice1 linked violation
February 9, 2007State Public Notification requested1 linked violation
February 9, 2007State Violation/Reminder Notice1 linked violation
May 18, 2006State Public Notification received2 linked violations
March 22, 2006State Public Notification requested2 linked violations
March 22, 2006State Violation/Reminder Notice2 linked violations
March 2, 2006State Compliance achieved21 linked violations
February 26, 2006State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
February 24, 2006State Public Notification received1 linked violation
February 24, 2006State Public Notification received2 linked violations
February 16, 2006State Public Notification requested1 linked violation
February 16, 2006State Public Notification requested1 linked violation
February 16, 2006State Violation/Reminder Notice2 linked violations
January 23, 2006State Violation/Reminder Notice2 linked violations
January 23, 2006State Public Notification requested2 linked violations
January 13, 2006State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
January 13, 2006State Public Notification received1 linked violation
January 13, 2006State Public Notification received2 linked violations
December 16, 2005State Public Notification requested1 linked violation
December 16, 2005State Public Notification requested1 linked violation
December 16, 2005State Violation/Reminder Notice1 linked violation
December 16, 2005State Violation/Reminder Notice1 linked violation
December 15, 2005State Compliance achieved23 linked violations
November 18, 2005State Violation/Reminder Notice2 linked violations
November 18, 2005State Public Notification requested2 linked violations
November 18, 2005State Violation/Reminder Notice1 linked violation
October 17, 2005State Public Notification requested1 linked violation
October 17, 2005State Violation/Reminder Notice1 linked violation
October 17, 2005State Public Notification requested1 linked violation
October 17, 2005State Violation/Reminder Notice1 linked violation
September 30, 2005State Violation/Reminder Notice1 linked violation
September 30, 2005State Public Notification requested1 linked violation
September 30, 2005State Violation/Reminder Notice1 linked violation
September 30, 2005State Public Notification requested1 linked violation
September 19, 2005State Public Notification received2 linked violations
September 19, 2005State Public Notification received1 linked violation
August 22, 2005State Public Notification received1 linked violation
August 12, 2005State Violation/Reminder Notice1 linked violation
August 12, 2005State Public Notification requested1 linked violation
August 12, 2005State Violation/Reminder Notice1 linked violation
August 12, 2005State Public Notification requested1 linked violation
August 12, 2005State Public Notification requested1 linked violation
August 12, 2005State Violation/Reminder Notice1 linked violation
August 2, 2005State Public Notification requested1 linked violation
August 2, 2005State Violation/Reminder Notice1 linked violation
July 15, 2005State Public Notification requested1 linked violation
July 15, 2005State Violation/Reminder Notice1 linked violation
June 2, 2005State Violation/Reminder Notice1 linked violation
June 2, 2005State Public Notification requested1 linked violation
May 18, 2005State Public Notification requested1 linked violation
May 18, 2005State Violation/Reminder Notice1 linked violation
May 18, 2005State Public Notification requested1 linked violation
May 18, 2005State Violation/Reminder Notice1 linked violation
May 16, 2005State Compliance achievedgeneral compliance action — not tied to a specific violation on record
May 16, 2005State Compliance achieved22 linked violations
May 16, 2005State Public Notification received1 linked violation
April 19, 2005State Violation/Reminder Notice2 linked violations
April 12, 2005State Public Notification requested33 linked violations
April 7, 2005State Public Notification requested22 linked violations
April 7, 2005State Violation/Reminder Notice22 linked violations
February 11, 2005State Public Notification requested2 linked violations
February 11, 2005State Violation/Reminder Notice2 linked violations
December 8, 2004State Public Notification received2 linked violations
March 9, 2004State Public Notification received3 linked violations
March 9, 2004State Public Notification received2 linked violations
March 9, 2004State Public Notification received2 linked violations
December 15, 2003State Violation/Reminder Notice1 linked violation
July 30, 2003State Public Notification requested1 linked violation
June 24, 2003State Public Notification requested2 linked violations
June 24, 2003State Violation/Reminder Notice1 linked violation
February 4, 2003State Public Notification requested10 linked violations
February 4, 2003State Violation/Reminder Notice10 linked violations
December 5, 2002State Public Notification requested1 linked violation
December 5, 2002State Violation/Reminder Notice1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
February 11, 1997State Compliance achieved1 linked violation
December 31, 1996State Formal Notice of Violation issued1 linked violation
December 31, 1996State Formal Notice of Violation issued1 linked violation
December 31, 1996State Formal Notice of Violation issued1 linked violation
December 31, 1996State Formal Notice of Violation issued1 linked violation
December 31, 1996State Formal Notice of Violation issued1 linked violation
December 31, 1996State Formal Notice of Violation issued5 linked violations
December 31, 1996State Formal Notice of Violation issued2 linked violations
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Public Notification requested1 linked violation
December 31, 1996State Formal Notice of Violation issued1 linked violation

Last known contact on file (system is inactive)

HEPNER, DANIEL

303-444-5141

LOUISVILLE, CO 80027