DENMARK, IA · Lee County

DENMARK WATER COMPANY Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of June 1, 2009. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.

If you are a resident looking for your current water provider, see water systems in Lee County, IA.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Iowa’s official records. Always confirm current status with Iowa before making decisions based on this information.

System facts

System ID (PWSID): IA5617029
System type: Community Water System
Population served: 550
Service connections: 220
Ownership: local government
Water source: groundwater (wells)

DENMARK WATER COMPANY is one of 403 community water systems in Iowa in the 501 to 3,300 people size category, formerly serving 550 people from groundwater.

EPA's federal records list this system as inactive in 2009; the record below is historical.

As of August 1, 2026, its federal record holds 24 entries between 1982 and 2008, all of which EPA lists as closed. Nothing has been added since 2008.

Of the 24, 16 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves synthetic organic chemicals, the Radionuclides and Revised Rad Rule, and volatile organic chemicals.

Violation history

Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
July 1, 2008 – September 30, 2008
Resolved
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Ethylbenzene
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Tetrachloroethylene
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
LASSO
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Atrazine
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Benzo(a)pyrene
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Dalapon
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Dinoseb
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Picloram
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Simazine
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Carbon tetrachloride
April 1, 1996 – March 31, 2001
Resolved
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 1987 – June 30, 1987
Resolved
Notification, Public
—
Combined Radium (-226 and -228)
October 1, 1986 – December 31, 1986
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Combined Radium (-226 and -228)
April 1, 1986 – June 30, 1986
Resolved
Maximum Contaminant Level Violation, Average
Health-based
Combined Radium (-226 and -228)
October 1, 1985 – September 30, 1986
Archived
Maximum Contaminant Level Violation, Average
Health-based
Gross Alpha, Excl. Radon and U
October 1, 1985 – September 30, 1986
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
October 1, 1984 – September 30, 1985
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Fluoride
October 1, 1983 – December 31, 1983
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Gross Alpha, Excl. Radon and U
April 1, 1982 – March 31, 1986
Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2008 – September 30, 2008	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	p-Dichlorobenzene	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	1,1-Dichloroethylene	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Ethylbenzene	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Tetrachloroethylene	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	1,1,1-Trichloroethane	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	LASSO	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Atrazine	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Benzo(a)pyrene	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Dalapon	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Dinoseb	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Picloram	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Simazine	—	Resolved
April 1, 1996 – March 31, 2001	Monitoring, Regular	Carbon tetrachloride	—	Resolved
April 1, 1987 – June 30, 1987	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
October 1, 1986 – December 31, 1986	Notification, Public	Combined Radium (-226 and -228)	—	Resolved
April 1, 1986 – June 30, 1986	Maximum Contaminant Level Violation, Single Sample	Combined Radium (-226 and -228)	Health-based	Resolved
October 1, 1985 – September 30, 1986	Maximum Contaminant Level Violation, Average	Combined Radium (-226 and -228)	Health-based	Archived
October 1, 1985 – September 30, 1986	Maximum Contaminant Level Violation, Average	Gross Alpha, Excl. Radon and U	Health-based	Archived
October 1, 1984 – September 30, 1985	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
October 1, 1983 – December 31, 1983	Maximum Contaminant Level Violation, Single Sample	Fluoride	Health-based	Archived
April 1, 1982 – March 31, 1986	Maximum Contaminant Level Violation, Single Sample	Gross Alpha, Excl. Radon and U	Health-based	Resolved

Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

October 31, 2007State Public Notification requested2 linked violations
October 31, 2007State Public Notification requested2 linked violations
October 31, 2007State Formal Notice of Violation issued2 linked violations
May 17, 2001State Formal Notice of Violation issued6 linked violations
May 17, 2001State Public Notification requested17 linked violations
May 17, 2001State Public Notification requested7 linked violations
May 17, 2001State Public Notification requested4 linked violations
May 17, 2001State Public Notification requested3 linked violations
May 17, 2001State Public Notification requested6 linked violations
May 17, 2001State Formal Notice of Violation issued4 linked violations
May 17, 2001State Formal Notice of Violation issued4 linked violations
May 17, 2001State Formal Notice of Violation issued4 linked violations
May 17, 2001State Formal Notice of Violation issued8 linked violations
May 17, 2001State Formal Notice of Violation issued4 linked violations
May 17, 2001State Public Notification requested3 linked violations
May 17, 2001State Public Notification requested3 linked violations
May 17, 2001State Public Notification requested4 linked violations
May 17, 2001State Formal Notice of Violation issued5 linked violations
May 17, 2001State Formal Notice of Violation issued7 linked violations
May 17, 2001State Formal Notice of Violation issued5 linked violations
May 17, 2001State Public Notification requested7 linked violations
May 17, 2001State Public Notification requested5 linked violations
May 17, 2001State Formal Notice of Violation issued2 linked violations
May 17, 2001State Formal Notice of Violation issued3 linked violations
May 17, 2001State Formal Notice of Violation issued5 linked violations
May 17, 2001State Formal Notice of Violation issued8 linked violations
May 17, 2001State Formal Notice of Violation issued7 linked violations
May 17, 2001State Formal Notice of Violation issued8 linked violations
May 17, 2001State Formal Notice of Violation issued4 linked violations
May 17, 2001State Formal Notice of Violation issued4 linked violations
May 17, 2001State Formal Notice of Violation issued5 linked violations
May 17, 2001State Public Notification requested4 linked violations
May 17, 2001State Public Notification requested19 linked violations
April 24, 2001State Compliance achieved6 linked violations
April 24, 2001State Compliance achieved24 linked violations
April 24, 2001State Compliance achieved6 linked violations
April 24, 2001State Compliance achieved3 linked violations
April 24, 2001State Compliance achieved6 linked violations
April 24, 2001State Compliance achieved4 linked violations
April 24, 2001State Compliance achieved5 linked violations
April 24, 2001State Compliance achieved22 linked violations
April 24, 2001State Compliance achieved4 linked violations
April 24, 2001State Compliance achieved4 linked violations
April 24, 2001State Compliance achieved4 linked violations
April 24, 2001State Compliance achieved9 linked violations
April 24, 2001State Compliance achieved5 linked violations
April 24, 2001State Compliance achieved5 linked violations
April 24, 2001State Compliance achieved6 linked violations
February 26, 1998State Formal Notice of Violation issued2 linked violations
May 5, 1997State Compliance achieved2 linked violations
May 30, 1996State Compliance achieved2 linked violations
March 22, 1988State Compliance achieved1 linked violation
February 12, 1988State Formal Notice of Violation issued1 linked violation
December 15, 1987State Formal Notice of Violation issued1 linked violation
March 17, 1987State Compliance achieved1 linked violation
March 15, 1987State Compliance achieved2 linked violations
March 15, 1987State Compliance achieved1 linked violation
February 13, 1987State Public Notification requested1 linked violation
July 15, 1986State Public Notification received1 linked violation
June 13, 1986State Public Notification requested1 linked violation

Last known contact on file (system is inactive)

DENMARK WATER COMPANY

319-528-6221

DENMARK, IA 52624