ARCO CITY OF

Idaho — Community Water System — PWSID: ID6120001

System Information

PWSID	ID6120001
System Name	ARCO CITY OF
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	Mar 13, 1980
Last Reported	Dec 19, 2025

Location & Contact

State	Idaho
City	ARCO
ZIP Code	83213
Address	PO BOX 196
Organization	HAROLDSEN, SAM
Phone	208-527-8294

Population & Service

Population Served	1,080
Service Connections	619

Drinking Water Violations (45)

This water system has 45 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, 2025	Jul 31, 2025	E. COLI	MR	No	Yes	—	—	—	Archived	Jul 31, 2025	Ground Water Rule
Jul 1, 2025	Jul 31, 2025	E. COLI	MR	No	Yes	—	—	—	Archived	Jul 31, 2025	Ground Water Rule
Aug 1, 2022	Aug 31, 2022	Revised Total Coliform Rule	MCL	Yes	No	—	—	—	Resolved	Aug 31, 2022	Revised Total Coliform Rule
Aug 1, 2022	Aug 31, 2022	Revised Total Coliform Rule	MCL	Yes	No	—	—	—	Resolved	Aug 31, 2022	Revised Total Coliform Rule
Aug 1, 2022	Aug 31, 2022	Revised Total Coliform Rule	MCL	Yes	No	—	—	—	Resolved	Aug 31, 2022	Revised Total Coliform Rule
Aug 1, 2022	Aug 31, 2022	Revised Total Coliform Rule	MCL	Yes	No	—	—	—	Resolved	Aug 31, 2022	Revised Total Coliform Rule
Oct 1, 2016	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 5, 2018	Lead and Copper Rule
Oct 1, 2016	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 5, 2018	Lead and Copper Rule
Oct 1, 2016	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 5, 2018	Lead and Copper Rule
Nov 1, 2015	Nov 30, 2015	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 2015	Total Coliform Rule
Nov 1, 2015	Nov 30, 2015	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Nov 30, 2015	Total Coliform Rule
Mar 1, 2015	Mar 31, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Mar 31, 2015	Total Coliform Rule
Mar 1, 2015	Mar 31, 2015	Coliform (TCR)	MR	No	No	—	5% of samples	—	Archived	Mar 31, 2015	Total Coliform Rule
Dec 1, 2014	Dec 31, 2014	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Dec 31, 2014	Total Coliform Rule
Dec 1, 2014	Dec 31, 2014	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Dec 31, 2014	Total Coliform Rule
Sep 1, 2013	Sep 30, 2013	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 2013	Total Coliform Rule
Sep 1, 2013	Sep 30, 2013	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Archived	Sep 30, 2013	Total Coliform Rule
Jan 1, 1996	Dec 31, 1996	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1996	Nitrate Rule
Jan 1, 1995	Dec 31, 1995	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 1995	Nitrate Rule
Apr 1, 1994	Apr 30, 1994	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Resolved	Apr 30, 1994	Total Coliform Rule
Jan 2, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	May 14, 2002	Lead and Copper Rule
Jan 2, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	May 14, 2002	Lead and Copper Rule
Jan 2, 1994	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	May 14, 2002	Lead and Copper Rule
Sep 1, 1993	Sep 30, 1993	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Sep 30, 1993	Total Coliform Rule
Jan 1, 1993	Dec 31, 1995	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 1995	Inorganic Chemicals
Jan 1, 1993	Dec 31, 1995	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1995	Inorganic Chemicals
May 1, 1991	May 31, 1991	Coliform (TCR)	MR	No	Yes	—	5% of samples	—	Archived	May 31, 1991	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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