MALDEN WATER DEPT

Washington — Community Water System — PWSID: WA5350550

System Information

PWSID	WA5350550
System Name	MALDEN WATER DEPT
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	10
Serves School	No
Wholesaler	No
First Reported	Feb 7, 1981
Last Reported	Dec 11, 2025

Location & Contact

State	Washington
City	Rosalia
ZIP Code	99170-0006
Address	PO Box 6
Organization	MALDEN WATER DEPT
Phone	—

Population & Service

Population Served	215
Service Connections	65

Drinking Water Violations (59)

This water system has 59 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
Jan 1, 2022	Dec 31, 2022	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2022	Nitrate Rule
Jul 1, 2020	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jun 4, 2021	Consumer Confidence Rule
Jan 1, 2016	Dec 31, 2016	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2016	Nitrate Rule
Jan 1, 2011	Dec 31, 2019	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Nitrite	MR	No	Yes	—	1 mg/L	—	Resolved	Dec 31, 2019	Nitrate Rule
Jan 1, 2011	Dec 31, 2019	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	CYANIDE	MR	No	Yes	—	0.2 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 2019	Inorganic Chemicals
Jan 1, 2011	Dec 31, 2019	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Dec 31, 2019	Arsenic Rule
Jul 1, 2010	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Oct 14, 2010	Consumer Confidence Rule
May 1, 2010	May 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2010	Total Coliform Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2007	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jan 1, 2006	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 2007	Lead and Copper Rule
Jul 1, 2005	Jul 31, 2005	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Jul 31, 2005	Total Coliform 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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