OSKALOOSA, IA · Mahaska County

OSKALOOSA MUNICIPAL WATER DEPT Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): IA6273005
System type: Community Water System
Population served: 12,808
Service connections: 5,400
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2024 – March 31, 2024
Resolved
Monitoring, Routine (RTCR)
—
Revised Total Coliform Rule
February 1, 2021 – February 28, 2021
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 2015 – August 31, 2015
Resolved
Monitoring and Reporting (DBP)
—
CARBON, TOTAL
April 1, 2012 – June 5, 2012
Resolved
Single Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
February 1, 2011 – February 28, 2011
Resolved
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2009 – September 30, 2009
Resolved
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
May 1, 1999 – May 31, 1999
Resolved
Monitoring, Regular
—
Xylenes, Total
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
trans-1,2-Dichloroethylene
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
Tetrachloroethylene
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
Toluene
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
Styrene
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
DICHLOROMETHANE
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1992 – March 31, 1992
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 2024 – March 31, 2024	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	Resolved
February 1, 2021 – February 28, 2021	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	—	Resolved
August 1, 2015 – August 31, 2015	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 2012 – June 5, 2012	Monitoring and Reporting (DBP)	CARBON, TOTAL	—	Resolved
February 1, 2011 – February 28, 2011	Single Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
September 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
May 1, 1999 – May 31, 1999	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	Xylenes, Total	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	1,1,2-Trichloroethane	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	Tetrachloroethylene	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	CHLOROBENZENE	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	Toluene	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	Styrene	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	1,2-Dichloropropane	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	DICHLOROMETHANE	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	o-Dichlorobenzene	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

June 10, 2025State Public Notification received2 linked violations
July 3, 2024State Compliance achieved2 linked violations
June 10, 2024State Public Notification requested2 linked violations
June 10, 2024State Formal Notice of Violation issued2 linked violations
June 11, 2021State Public Notification received2 linked violations
March 24, 2021State Public Notification requested2 linked violations
March 24, 2021State Formal Notice of Violation issued2 linked violations
December 2, 2019State Compliance achieved1 linked violation
November 26, 2019State Formal Notice of Violation issued1 linked violation
August 13, 2015State Public Notification requested2 linked violations
August 6, 2015State Violation/Reminder Notice5 linked violations
January 22, 2015State Public Notification requested1 linked violation
January 7, 2015State Compliance achieved2 linked violations
June 21, 2012State Public Notification requested2 linked violations
June 5, 2012State Compliance achieved2 linked violations
April 1, 2011State Compliance achieved1 linked violation
November 28, 2005State Formal Notice of Violation issued7 linked violations
January 31, 2002State Compliance achieved1 linked violation
October 9, 2001State Public Notification received1 linked violation
September 7, 2001State Formal Notice of Violation issued1 linked violation
September 15, 2000State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
May 8, 2000State Compliance achieved1 linked violation
August 11, 1999State Public Notification received3 linked violations
June 7, 1999State Formal Notice of Violation issued3 linked violations
August 26, 1994State Public Notification requested2 linked violations
August 24, 1994State Public Notification requested8 linked violations
June 3, 1992State Public Notification received10 linked violations
June 3, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
June 3, 1992State Public Notification received2 linked violations
June 3, 1992State Public Notification received17 linked violations
June 3, 1992State Public Notification received13 linked violations
June 3, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification received2 linked violations
June 3, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification received2 linked violations
June 3, 1992State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
June 3, 1992State Public Notification received1 linked violation
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved4 linked violations
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved2 linked violations
June 1, 1992State Compliance achieved2 linked violations
May 19, 1992State Public Notification requested1 linked violation
May 19, 1992State Public Notification requested1 linked violation
May 19, 1992State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
May 19, 1992State Formal Notice of Violation issued3 linked violations
May 19, 1992State Formal Notice of Violation issued1 linked violation
May 19, 1992State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
May 19, 1992State Formal Notice of Violation issued1 linked violation
May 19, 1992State Formal Notice of Violation issued3 linked violations
May 19, 1992State Public Notification requested1 linked violation
May 19, 1992State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
May 19, 1992State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
May 19, 1992State Formal Notice of Violation issued1 linked violation
May 19, 1992State Public Notification requested2 linked violations
May 19, 1992State Public Notification requested2 linked violations
May 19, 1992State Formal Notice of Violation issued4 linked violations
May 19, 1992State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
May 19, 1992State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
May 19, 1992State Formal Notice of Violation issued3 linked violations
May 19, 1992State Formal Notice of Violation issued2 linked violations
May 19, 1992State Public Notification requested7 linked violations
March 1, 1982State Unresolved1 linked violation
February 19, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
February 16, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
February 5, 1982State Unresolved1 linked violation
January 21, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record

Contact

OSKALOOSA MUNICIPAL WATER DEPT

641-673-8476

OSKALOOSA, IA 52577