Lummi Island, WA · Whatcom County

HILLTOP WATER OWNERS 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 Washington’s official records. Always confirm current status with Washington before making decisions based on this information.

System facts

System ID (PWSID): WA5333364
System type: Community Water System
Population served: 137
Service connections: 57
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
July 1, 2020 – July 31, 2020
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Arsenic
January 1, 2010 – March 31, 2010
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2009 – December 31, 2009
Resolved
Monitoring, Regular
—
Arsenic
April 1, 2007 – June 30, 2007
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2007 – March 31, 2007
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 2006 – November 30, 2006
Archived
Monitoring, Regular
—
Arsenic
October 1, 2006 – December 31, 2006
Resolved
Monitoring, Regular
—
Arsenic
July 1, 2006 – September 30, 2006
Resolved
Maximum Contaminant Level Violation, Acute (TCR)
Health-based
Coliform (TCR)
June 1, 2006 – June 30, 2006
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
March 1, 2004 – March 31, 2004
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
February 1, 2004 – February 29, 2004
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
October 19, 1994 – November 18, 1994
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
December 1, 1992 – December 31, 1992
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
November 1, 1992 – November 30, 1992
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
November 1, 1992 – November 30, 1992
Archived
Monitoring, Repeat Minor (TCR)
—
Coliform (TCR)
July 1, 1992 – July 31, 1992
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1992 – July 31, 1992
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
July 1, 2020 – July 31, 2020	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
January 1, 2010 – March 31, 2010	Maximum Contaminant Level Violation, Single Sample	Arsenic	Health-based	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2009 – December 31, 2009	Monitoring, Regular	Nitrate	—	Resolved
April 1, 2007 – June 30, 2007	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2007 – March 31, 2007	Monitoring, Regular	Arsenic	—	Resolved
November 1, 2006 – November 30, 2006	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 1, 2006 – December 31, 2006	Monitoring, Regular	Arsenic	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring, Regular	Arsenic	—	Resolved
June 1, 2006 – June 30, 2006	Maximum Contaminant Level Violation, Acute (TCR)	Coliform (TCR)	Health-based	Archived
March 1, 2004 – March 31, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
February 1, 2004 – February 29, 2004	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
October 19, 1994 – November 18, 1994	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
December 1, 1992 – December 31, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
November 1, 1992 – November 30, 1992	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
November 1, 1992 – November 30, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 1992 – July 31, 1992	Monitoring, Repeat Minor (TCR)	Coliform (TCR)	—	Archived
July 1, 1992 – July 31, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

August 11, 2020State Compliance achieved2 linked violations
February 28, 2013State Compliance achieved1 linked violation
May 3, 2010State Compliance achieved1 linked violation
March 1, 2010State Compliance achieved1 linked violation
September 5, 2007State Compliance achieved74 linked violations
December 31, 1992State Violation/Reminder Notice3 linked violations
November 30, 1992State Violation/Reminder Notice2 linked violations
January 31, 1992State Violation/Reminder Notice1 linked violation

Contact

HILLTOP WATER OWNERS ASSOCIATION

Phone not on record

Lummi Island, WA 98262