TONASKET WATER SYSTEM

Washington — Community Water System — PWSID: WA5388700

System Information

PWSID	WA5388700
System Name	TONASKET WATER SYSTEM
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	10
Serves School	No
Wholesaler	Yes
First Reported	Feb 7, 1981
Last Reported	Dec 11, 2025

Location & Contact

State	Washington
City	Tonasket
ZIP Code	98855
Address	PO Box 266
Organization	TONASKET WATER SYSTEM
Phone	—

Population & Service

Population Served	2,392
Service Connections	602

Drinking Water Violations (24)

This water system has 24 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
Oct 1, 2020	Oct 31, 2020	Revised Total Coliform Rule	MON	No	Yes	—	—	—	Resolved	Oct 31, 2020	Revised Total Coliform Rule
Oct 1, 2019	Oct 31, 2019	Revised Total Coliform Rule	MON	No	No	—	—	—	Resolved	Oct 31, 2019	Revised Total Coliform Rule
Jul 1, 2018	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Sep 11, 2018	Consumer Confidence Rule
May 1, 2014	May 31, 2014	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2014	Total Coliform Rule
Nov 1, 1998	Nov 30, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 1998	Total Coliform Rule
Nov 1, 1998	Nov 30, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 1998	Total Coliform Rule
Nov 1, 1998	Nov 30, 1998	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 1998	Total Coliform Rule
Oct 1, 1997	Oct 31, 1997	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1997	Total Coliform Rule
Oct 1, 1997	Oct 31, 1997	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1997	Total Coliform Rule
Oct 1, 1997	Oct 31, 1997	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Oct 31, 1997	Total Coliform Rule
Nov 1, 1996	Nov 30, 1996	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 1996	Total Coliform Rule
Nov 1, 1996	Nov 30, 1996	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 1996	Total Coliform Rule
Nov 1, 1996	Nov 30, 1996	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 1996	Total Coliform Rule
Nov 1, 1995	Nov 30, 1995	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 1995	Total Coliform Rule
Oct 1, 1991	Oct 31, 1991	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Oct 31, 1991	Total Coliform Rule
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	Chromium	MR	No	No	—	0.1 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
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	Nitrate	MR	No	No	—	10 mg/L	—	Archived	Oct 31, 1979	Nitrate 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	Fluoride	MR	No	No	—	4.0 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

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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