THOMPSON WATER WORKS

Iowa — Community Water System — PWSID: IA9585017

System Information

PWSID	IA9585017
System Name	THOMPSON WATER WORKS
System Type	Community Water System
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	07
Serves School	No
Wholesaler	No
First Reported	Feb 27, 1979
Last Reported	Dec 19, 2025

Location & Contact

State	Iowa
City	THOMPSON
ZIP Code	50478
Address	ATTN WATER SUPT
Organization	THOMPSON WATER WORKS
Phone	641-584-2785

Population & Service

Population Served	499
Service Connections	312

Drinking Water Violations (98)

This water system has 98 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
Sep 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Sep 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Sep 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Sep 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Sep 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Apr 1, 2001	Jun 30, 2001	Vinyl chloride	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 2001	Volatile Organic Chemicals
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Jul 1, 2000	Jun 30, 2001	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 2001	Arsenic Rule
Apr 1, 1989	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 16, 1990	Lead and Copper Rule
Apr 1, 1989	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 16, 1990	Lead and Copper Rule
Apr 1, 1989	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 16, 1990	Lead and Copper Rule
Apr 1, 1989	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 16, 1990	Lead and Copper Rule
Jul 1, 1986	Jun 30, 1989	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 1989	Arsenic Rule
Jul 1, 1986	Jun 30, 1989	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 1989	Arsenic Rule
Jul 1, 1986	Jun 30, 1989	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 1989	Arsenic Rule
Jul 1, 1986	Jun 30, 1989	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 1989	Arsenic Rule
Jul 1, 1986	Jun 30, 1989	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Jun 30, 1989	Arsenic Rule
Jul 1, 1986	Jun 30, 1989	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 1989	Inorganic Chemicals
Jul 1, 1986	Jun 30, 1989	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Jun 30, 1989	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.

Browse All Water Systems Water Safety Stats Water Safety Home

Browse All Water Systems Water Systems in Iowa