TWANOH STATE PARK

Washington — Transient Non-Community — PWSID: WA53SP940

System Information

PWSID	WA53SP940
System Name	TWANOH STATE PARK
System Type	Transient Non-Community
Water Source	Ground Water
Activity Status	Active
Owner Type	State
EPA Region	10
Serves School	No
Wholesaler	No
First Reported	Feb 7, 1981
Last Reported	Mar 26, 2026

Location & Contact

State	Washington
City	Belfair
ZIP Code	98528
Address	PO Box 2787
Organization	TWANOH STATE PARK
Phone	—

Population & Service

Population Served	3,173
Service Connections	49

Drinking Water Violations (32)

This water system has 32 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Aug 1, 2019	Aug 31, 2019	MON	No	No	—	—	—	Resolved	Aug 31, 2019	—
Dec 1, 2013	Dec 31, 2013	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 2013	—
Mar 1, 2011	Mar 31, 2011	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 2011	—
Jan 1, 2007	Dec 31, 2007	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	—
Jan 1, 2007	Dec 31, 2007	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	—
Jan 1, 2007	Dec 31, 2007	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	—
Jan 1, 2007	Dec 31, 2007	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	—
Jan 1, 2007	Dec 31, 2007	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	—
Jan 1, 2007	Dec 31, 2007	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2007	—
Dec 1, 2006	Dec 31, 2006	MR	No	No	—	5% of samples	—	Archived	Dec 31, 2006	—
Jul 1, 2006	Jul 31, 2006	MCL	Yes	No	—	5% of samples	—	Archived	Jul 31, 2006	—
Nov 1, 2005	Nov 30, 2005	MR	No	No	—	5% of samples	—	Archived	Nov 30, 2005	—
Oct 1, 2005	Oct 31, 2005	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 2005	—
Jan 1, 2004	Dec 31, 2004	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2004	—
Oct 1, 2003	Oct 31, 2003	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 2003	—
Sep 1, 2003	Sep 30, 2003	MR	No	No	—	5% of samples	—	Archived	Sep 30, 2003	—
Aug 1, 2003	Aug 31, 2003	MCL	Yes	No	—	5% of samples	—	Archived	Aug 31, 2003	—
Apr 1, 1999	Apr 30, 1999	MCL	Yes	No	—	5% of samples	—	Archived	Apr 30, 1999	—
Apr 1, 1999	Apr 30, 1999	MCL	Yes	No	—	5% of samples	—	Archived	Apr 30, 1999	—
Apr 1, 1999	Apr 30, 1999	MCL	Yes	No	—	5% of samples	—	Archived	Apr 30, 1999	—
Sep 1, 1997	Sep 30, 1997	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 1997	—
Sep 1, 1997	Sep 30, 1997	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 1997	—
Sep 1, 1997	Sep 30, 1997	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 1997	—
May 1, 1996	May 31, 1996	MR	No	Yes	—	5% of samples	—	Archived	May 31, 1996	—
Jun 1, 1995	Jun 30, 1995	MCL	Yes	No	—	5% of samples	—	Archived	Jun 30, 1995	—
Apr 1, 1993	Apr 30, 1993	MR	No	Yes	—	5% of samples	—	Archived	Apr 30, 1993	—
Dec 1, 1992	Dec 31, 1992	MCL	Yes	No	—	5% of samples	—	Archived	Dec 31, 1992	—
Aug 1, 1992	Aug 31, 1992	MCL	Yes	No	—	5% of samples	—	Archived	Aug 31, 1992	—
Aug 1, 1992	Aug 31, 1992	MCL	Yes	No	—	5% of samples	—	Archived	Aug 31, 1992	—
Aug 1, 1992	Aug 31, 1992	MCL	Yes	No	—	5% of samples	—	Archived	Aug 31, 1992	—
—	—	—	No	No	—	—	—	—	—	—
—	—	—	No	No	—	—	—	—	—	—

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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