OAKVILLE, 10

CHEHALIS TRIBAL HOUSING 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 EPA Region 10’s official records. Always confirm current status with EPA Region 10 before making decisions based on this information.

System facts

System ID (PWSID): 105300027
System type: Community Water System
Population served: 620
Service connections: 114
Ownership: Native American tribal
Water source: groundwater (wells)

Violation history

Monitoring, Routine Major (TCR)
—
Coliform (TCR)
September 1, 2006 – September 30, 2006
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
August 1, 2006 – August 31, 2006
Archived
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2006 – December 15, 2008
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
July 1, 2006 – September 30, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
July 1, 2006 – July 31, 2006
Archived
Monitoring and Reporting (DBP)
—
Chlorine
April 1, 2006 – May 22, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 2006 – April 30, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 2006 – March 31, 2006
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2006 – February 28, 2006
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2006 – December 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
Chlorine
January 1, 2006 – March 31, 2006
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2006 – December 31, 2006
Resolved
Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2005 – June 4, 2009
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2005 – March 31, 2005
Resolved
Monitoring, Regular
—
Arsenic
January 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
January 1, 2005 – December 31, 2005
Resolved
Monitoring and Reporting (DBP)
—
TTHM
January 1, 2005 – December 31, 2005
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 2004 – February 29, 2004
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2001 – July 29, 2003
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1991 – March 31, 1991
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
February 1, 1991 – February 28, 1991
Archived
Monitoring, Regular
—
Barium
January 1, 1988 – December 31, 1990
Archived
Monitoring, Regular
—
Mercury
January 1, 1988 – December 31, 1990
Archived
Monitoring, Regular
—
Nitrate
January 1, 1988 – December 31, 1990
Archived
Monitoring, Regular
—
Selenium
January 1, 1988 – December 31, 1990
Archived
Monitoring, Regular
—
Cadmium
January 1, 1988 – December 31, 1990
Archived
Monitoring, Regular
—
Arsenic
January 1, 1988 – December 31, 1990
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
January 1, 1987 – December 31, 1990
Archived

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

Period	Violation	Contaminant / rule	Health-based	Status
September 1, 2006 – September 30, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
August 1, 2006 – August 31, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
July 1, 2006 – December 15, 2008	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
July 1, 2006 – September 30, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
July 1, 2006 – July 31, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
April 1, 2006 – May 22, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
April 1, 2006 – April 30, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 2006 – March 31, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
February 1, 2006 – February 28, 2006	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2006 – March 31, 2006	Monitoring and Reporting (DBP)	Chlorine	—	Resolved
January 1, 2006 – December 31, 2006	Monitoring and Reporting (DBP)	TTHM	—	Resolved
October 1, 2005 – June 4, 2009	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
January 1, 2005 – March 31, 2005	Monitoring, Regular	Nitrate	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring, Regular	Arsenic	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
January 1, 2005 – December 31, 2005	Monitoring and Reporting (DBP)	TTHM	—	Resolved
February 1, 2004 – February 29, 2004	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
July 1, 2001 – July 29, 2003	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved
March 1, 1991 – March 31, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
February 1, 1991 – February 28, 1991	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
January 1, 1988 – December 31, 1990	Monitoring, Regular	Barium	—	Archived
January 1, 1988 – December 31, 1990	Monitoring, Regular	Mercury	—	Archived
January 1, 1988 – December 31, 1990	Monitoring, Regular	Nitrate	—	Archived
January 1, 1988 – December 31, 1990	Monitoring, Regular	Selenium	—	Archived
January 1, 1988 – December 31, 1990	Monitoring, Regular	Cadmium	—	Archived
January 1, 1988 – December 31, 1990	Monitoring, Regular	Arsenic	—	Archived
January 1, 1987 – December 31, 1990	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

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

Enforcement actions

July 30, 2010Federal Compliance achieved1 linked violation
August 19, 2009Federal Compliance achieved8 linked violations
June 4, 2009Federal Compliance achieved1 linked violation
December 15, 2008Federal Compliance achieved1 linked violation
May 22, 2006Federal Compliance achieved3 linked violations
June 17, 2005Federal Compliance achieved1 linked violation
August 1, 2004Federal Compliance achieved2 linked violations
July 29, 2003Federal Compliance achieved1 linked violation
July 29, 2003Federal Compliance achieved1 linked violation
March 5, 1990Federal issued Formal Notice of Violation13 linked violations

Contact

HAYDEN, TOM

360-709-1856

OAKVILLE, WA 98568