SEVEN BAYS ESTATES UNLIMITED

Washington — Community Water System — PWSID: WA5377651

System Information

PWSID	WA5377651
System Name	SEVEN BAYS ESTATES UNLIMITED
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Private
EPA Region	10
Serves School	No
Wholesaler	No
First Reported	Feb 7, 1981
Last Reported	Dec 11, 2025

Location & Contact

State	Washington
City	Marshall
ZIP Code	99020
Address	PO Box 66
Organization	SEVEN BAYS ESTATES UNLIMITED
Phone	—

Population & Service

Population Served	431
Service Connections	365

Drinking Water Violations (28)

This water system has 28 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jul 1, 2024	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Feb 20, 2025	Consumer Confidence Rule
Oct 1, 2022	Oct 31, 2022	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Oct 31, 2022	Revised Total Coliform Rule
Jan 1, 2022	Dec 31, 2022	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2022	Nitrate Rule
Jul 1, 2017	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Oct 9, 2017	Consumer Confidence Rule
Nov 1, 2015	Nov 30, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2015	Total Coliform Rule
Jul 1, 2015	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Sep 3, 2015	Consumer Confidence Rule
Jul 1, 2010	Jul 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jul 31, 2010	Total Coliform Rule
Jan 1, 2009	Dec 31, 2009	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2009	Nitrate Rule
Jan 1, 2009	Dec 31, 2009	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2009	Nitrate Rule
Dec 1, 1998	Dec 31, 1998	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Dec 31, 1998	Total Coliform Rule
Jul 1, 1993	Jul 31, 1993	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Jul 31, 1993	Total Coliform Rule
Jun 1, 1993	Jun 30, 1993	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Jun 30, 1993	Total Coliform Rule
Nov 1, 1992	Nov 30, 1992	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Nov 30, 1992	Total Coliform Rule
May 1, 1992	May 31, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	May 31, 1992	Total Coliform Rule
May 1, 1992	May 31, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	May 31, 1992	Total Coliform Rule
May 1, 1992	May 31, 1992	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	May 31, 1992	Total Coliform Rule
May 1, 1992	May 31, 1992	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	May 31, 1992	Total Coliform Rule
Mar 1, 1992	Mar 31, 1992	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Mar 31, 1992	Total Coliform Rule
Dec 1, 1991	Dec 31, 1991	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	Dec 31, 1991	Total Coliform Rule
Oct 1, 1979	Oct 31, 1979	Selenium	MR	No	No	—	0.05 mg/L	—	Archived	Oct 31, 1979	Inorganic Chemicals
Oct 1, 1979	Oct 31, 1979	Nitrate	MR	No	No	—	10 mg/L	—	Archived	Oct 31, 1979	Nitrate Rule
Oct 1, 1979	Oct 31, 1979	Chromium	MR	No	No	—	0.1 mg/L	—	Archived	Oct 31, 1979	Inorganic Chemicals
Oct 1, 1979	Oct 31, 1979	Cadmium	MR	No	No	—	0.005 mg/L	—	Archived	Oct 31, 1979	Inorganic Chemicals
Oct 1, 1979	Oct 31, 1979	Mercury	MR	No	No	—	0.002 mg/L	—	Archived	Oct 31, 1979	Inorganic Chemicals
Oct 1, 1979	Oct 31, 1979	Gross Alpha, Excl. Radon and U	MR	No	No	—	15 pCi/L	—	Archived	Oct 31, 1979	Radionuclides and Revised Rad Rule
Oct 1, 1979	Oct 31, 1979	Fluoride	MR	No	No	—	4.0 mg/L	—	Archived	Oct 31, 1979	Inorganic Chemicals
Oct 1, 1979	Oct 31, 1979	Barium	MR	No	No	—	2 mg/L	—	Archived	Oct 31, 1979	Inorganic Chemicals
Oct 1, 1979	Oct 31, 1979	Arsenic	MR	No	No	—	0.010 mg/L	—	Archived	Oct 31, 1979	Arsenic Rule

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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