ALLENSPARK, CO · Boulder County

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

System facts

System ID (PWSID): CO0107115
System type: Community Water System
Population served: 340
Service connections: 122
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2022 – February 28, 2022
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
July 6, 2021 – August 5, 2021
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
April 6, 2020 – August 5, 2021
Resolved
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2018 – October 3, 2018
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
August 5, 2017 – September 29, 2021
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
May 1, 2017 – May 31, 2017
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
April 1, 2017 – April 30, 2017
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
April 1, 2017 – April 30, 2017
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
January 1, 2017 – January 31, 2017
Resolved
Monitoring, Regular
—
Pentachlorophenol
January 1, 2016 – March 31, 2016
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
August 1, 2014 – August 31, 2014
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
August 1, 2014 – August 31, 2014
Resolved
Monitoring, Turbidity (Enhanced SWTR)
—
Interim Enhanced Surface Water Treatment Rule
June 1, 2010 – June 30, 2010
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
June 1, 2010 – June 30, 2010
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
June 1, 2009 – June 30, 2009
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
March 1, 2009 – March 31, 2009
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
February 1, 2009 – February 28, 2009
Resolved
Monitoring, Source Water (LT2)
—
E. COLI
October 1, 2008 – October 31, 2008
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2007 – December 31, 2007
Resolved
Monitoring, Regular
—
Nickel
January 1, 2006 – December 31, 2006
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
July 1, 2005 – July 31, 2005
Resolved
Monitoring of Treatment (SWTR-Filter)
—
Surface Water Treatment Rule
March 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Beryllium, Total
January 1, 2004 – December 31, 2004
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
February 1, 2022 – February 28, 2022	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
July 6, 2021 – August 5, 2021	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
April 6, 2020 – August 5, 2021	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
April 1, 2018 – October 3, 2018	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
August 5, 2017 – September 29, 2021	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
May 1, 2017 – May 31, 2017	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Resolved
April 1, 2017 – April 30, 2017	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
April 1, 2017 – April 30, 2017	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
January 1, 2017 – January 31, 2017	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2016 – March 31, 2016	Monitoring, Regular	Pentachlorophenol	—	Resolved
August 1, 2014 – August 31, 2014	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
August 1, 2014 – August 31, 2014	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
June 1, 2010 – June 30, 2010	Monitoring, Turbidity (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	—	Resolved
June 1, 2010 – June 30, 2010	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
June 1, 2009 – June 30, 2009	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
March 1, 2009 – March 31, 2009	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
February 1, 2009 – February 28, 2009	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
October 1, 2008 – October 31, 2008	Monitoring, Source Water (LT2)	E. COLI	—	Resolved
January 1, 2007 – December 31, 2007	Monitoring and Reporting (DBP)	TTHM	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring, Regular	Nickel	—	Resolved
July 1, 2005 – July 31, 2005	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
March 1, 2005 – March 31, 2005	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	—	Resolved
January 1, 2004 – December 31, 2004	Monitoring, Regular	Beryllium, Total	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

June 1, 2022State Public Notification requested33 linked violations
June 1, 2022State Violation/Reminder Notice2 linked violations
March 18, 2022State Violation/Reminder Notice6 linked violations
March 18, 2022State Public Notification requested10 linked violations
August 5, 2021State Public Notification received2 linked violations
August 5, 2021State Compliance achieved11 linked violations
April 26, 2021State Compliance achieved3 linked violations
March 23, 2021State Public Notification requested5 linked violations
January 20, 2021State Violation/Reminder Notice5 linked violations
December 1, 2020State Public Notification requested13 linked violations
November 18, 2019State Compliance achieved13 linked violations
October 1, 2019State Violation/Reminder Notice3 linked violations
August 14, 2019State Public Notification requested3 linked violations
October 3, 2018State Compliance achieved5 linked violations
March 16, 2018State Violation/Reminder Notice3 linked violations
March 16, 2018State Public Notification requested2 linked violations
October 4, 2017State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
September 13, 2017State Violation/Reminder Notice2 linked violations
July 10, 2017State Violation/Reminder Notice2 linked violations
June 2, 2017State Violation/Reminder Notice2 linked violations
June 2, 2017State Violation/Reminder Notice2 linked violations
May 16, 2017State Public Notification requested1 linked violation
March 9, 2017State Violation/Reminder Notice2 linked violations
March 1, 2017State Compliance achieved4 linked violations
February 7, 2017State Public Notification requested4 linked violations
April 1, 2015State Compliance achieved12 linked violations
November 4, 2014State Public Notification requested1 linked violation
November 4, 2014State Public Notification requested2 linked violations
November 4, 2014State Public Notification requested2 linked violations
November 4, 2014State Public Notification requested2 linked violations
November 4, 2014State Violation/Reminder Notice1 linked violation
July 18, 2011State Public Notification received4 linked violations
November 4, 2010State Violation/Reminder Notice2 linked violations
August 6, 2010State Compliance achieved5 linked violations
August 4, 2010State Violation/Reminder Notice2 linked violations
August 4, 2010State Violation/Reminder Notice2 linked violations
August 28, 2009State Public Notification requested3 linked violations
June 3, 2009State Violation/Reminder Notice4 linked violations
April 14, 2009State Violation/Reminder Notice1 linked violation
April 14, 2009State Public Notification requested4 linked violations
January 30, 2009State Public Notification requested2 linked violations
November 4, 2008State Public Notification requested3 linked violations
August 25, 2008State Compliance achieved6 linked violations
March 19, 2008State Compliance achieved24 linked violations
January 30, 2008State Violation/Reminder Notice8 linked violations
August 29, 2007State Compliance achieved21 linked violations
July 14, 2006State Public Notification requested6 linked violations
June 7, 2006State Violation/Reminder Notice16 linked violations
March 28, 2006State Violation/Reminder Notice4 linked violations
December 20, 2005State Compliance achieved6 linked violations
August 19, 2005State Public Notification requested28 linked violations
August 8, 2005State Violation/Reminder Notice20 linked violations
April 7, 2005State Violation/Reminder Notice26 linked violations
January 22, 2003State Public Notification requested16 linked violations

Contact

MAUERMAN, BARRY

303-747-0317

ALLENSPARK, CO 80510