PIONEER WATER COMPANY

Washington — Community Water System — PWSID: WA5324885

System Information

PWSID	WA5324885
System Name	PIONEER WATER COMPANY
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Private
EPA Region	10
Serves School	No
Wholesaler	Yes
First Reported	Aug 30, 1993
Last Reported	Dec 11, 2025

Location & Contact

State	Washington
City	Marshall
ZIP Code	99020
Address	PO Box 66
Organization	PIONEER WATER COMPANY
Phone	—

Population & Service

Population Served	443
Service Connections	165

Drinking Water Violations (46)

This water system has 46 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 26, 2025	Consumer Confidence Rule
Jan 1, 2024	Dec 31, 2024	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2024	Nitrate Rule
Jan 1, 2024	Dec 31, 2024	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2024	Nitrate Rule
Jul 1, 2021	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Oct 4, 2021	Consumer Confidence Rule
Sep 1, 2019	Sep 30, 2019	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Sep 30, 2019	Revised Total Coliform Rule
Jan 1, 2016	Dec 31, 2016	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2016	Nitrate Rule
Jan 1, 2016	Dec 31, 2016	Total Haloacetic Acids (HAA5)	MR	No	Yes	—	0.060 mg/L	—	Resolved	Dec 31, 2016	Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2015	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Sep 28, 2015	Consumer Confidence Rule
Jul 1, 2014	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Oct 20, 2014	Consumer Confidence Rule
Jul 1, 2013	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Sep 3, 2013	Consumer Confidence Rule
Jan 1, 2009	Dec 31, 2009	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2009	Nitrate Rule
Jan 1, 2005	Dec 31, 2007	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	Dec 31, 2007	Chromium	MR	No	Yes	—	0.1 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	CYANIDE	MR	No	Yes	—	0.2 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	Barium	MR	No	Yes	—	2 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	Nickel	MR	No	Yes	—	—	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Archived	Dec 31, 2007	Arsenic Rule
Jan 1, 2005	Dec 31, 2007	Selenium	MR	No	Yes	—	0.05 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	Dec 31, 2007	Mercury	MR	No	Yes	—	0.002 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	Dec 31, 2007	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Archived	Dec 31, 2007	Inorganic Chemicals
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2005	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper Rule
Jan 1, 2004	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2005	Lead and Copper 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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