Is OSKALOOSA MUNICIPAL WATER DEPT required to publish a Consumer Confidence Report?

Yes. OSKALOOSA MUNICIPAL WATER DEPT is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is OSKALOOSA MUNICIPAL WATER DEPT’s next Consumer Confidence Report due?

OSKALOOSA MUNICIPAL WATER DEPT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

OSKALOOSA, IA · Mahaska County

OSKALOOSA MUNICIPAL WATER DEPT Water System

Consumer Confidence Report status

OSKALOOSA MUNICIPAL WATER DEPT must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show no open violations for OSKALOOSA MUNICIPAL WATER DEPT.

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): 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)

OSKALOOSA MUNICIPAL WATER DEPT is one of 50 community water systems in Iowa in the 10,001 to 100,000 people size category, serving 12,808 people from surface water.

As of August 1, 2026, its federal record holds 13 entries between 1992 and 2024, all of which EPA lists as closed.

Of the 13, 9 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 volatile organic chemicals, the Total Coliform Rules, and the Surface Water Treatment Rules.

Violation history

Monitoring, Regular
—
Di(2-ethylhexyl) phthalate
January 1, 2024 – March 31, 2024
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
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
September 1, 2009 – September 30, 2009
Resolved
Monthly Turbidity Exceed (Enhanced SWTR)
Health-based
Interim Enhanced Surface Water Treatment Rule
October 1, 2008 – October 31, 2008
Resolved
Treatment Technique (SWTR and GWR)
Health-based
Surface Water Treatment Rule
October 1, 1998 – September 30, 1999
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1992 – March 31, 1992
Resolved
Monitoring, Regular
—
1,1,2-Trichloroethane
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
—
DICHLOROMETHANE
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

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
January 1, 2024 – March 31, 2024	Monitoring, Regular	Di(2-ethylhexyl) phthalate	—	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
September 1, 2009 – September 30, 2009	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
October 1, 2008 – October 31, 2008	Monthly Turbidity Exceed (Enhanced SWTR)	Interim Enhanced Surface Water Treatment Rule	Health-based	Resolved
October 1, 1998 – September 30, 1999	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Health-based	Archived
January 1, 1992 – March 31, 1992	Monitoring, Regular	o-Dichlorobenzene	—	Resolved
January 1, 1992 – March 31, 1992	Monitoring, Regular	1,1,2-Trichloroethane	—	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	DICHLOROMETHANE	—	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

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

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
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
January 22, 2015State Public Notification requested1 linked violation
January 7, 2015State Compliance achieved2 linked violations
June 3, 2013State Public Notification received2 linked violations
June 21, 2012State Public Notification requested2 linked violations
June 5, 2012State Compliance achieved2 linked violations
April 1, 2011State Compliance achieved1 linked violation
October 24, 2007State Formal Notice of Violation issued3 linked violations
August 13, 2007State Public Notification received3 linked violations
June 13, 2007State Public Notification requested2 linked violations
January 31, 2002State Compliance achieved1 linked violation
October 25, 2000State Public Notification received1 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
June 7, 1999State Formal Notice of Violation issued3 linked violations
November 22, 1995State Public Notification requested2 linked violations
August 24, 1994State Formal Notice of Violation issued6 linked violations
June 3, 1992State Public Notification received2 linked violations
June 3, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification received17 linked violations
June 3, 1992State Public Notification received1 linked violation
June 3, 1992State Public Notification received13 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 received3 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 3, 1992State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
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 achieved12 linked violations
June 1, 1992State Compliance achieved1 linked violation
June 1, 1992State Compliance achieved3 linked violations
June 1, 1992State Compliance achieved1 linked violation
May 19, 1992State Formal Notice of Violation issued1 linked violation
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 Public Notification requested1 linked violation
May 19, 1992State Public Notification requested2 linked violations
May 19, 1992State Public Notification requested7 linked violations
May 19, 1992State Public Notification requested1 linked violation
May 19, 1992State Formal Notice of Violation issued2 linked violations
May 19, 1992State Public Notification requested2 linked violations
May 19, 1992State Formal Notice of Violation issued3 linked violations
May 19, 1992State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
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 issued4 linked violations
May 19, 1992State Public Notification requested2 linked violations
May 19, 1992State Formal Notice of Violation issued2 linked violations
May 19, 1992State Public Notification requested2 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 issuedgeneral compliance action — not tied to a specific violation on record
May 19, 1992State Public Notification requested1 linked violation
May 19, 1992State Formal Notice of Violation issued3 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 requested1 linked violation
May 19, 1992State Formal Notice of Violation issuedgeneral compliance action — not tied to a specific violation on record
March 1, 1982State Unresolved1 linked violation
February 19, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
February 5, 1982State Unresolved1 linked violation
January 26, 1982State Unresolved1 linked violation
January 21, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record

Common questions

Is OSKALOOSA MUNICIPAL WATER DEPT required to publish a Consumer Confidence Report?: Yes. OSKALOOSA MUNICIPAL WATER DEPT is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is OSKALOOSA MUNICIPAL WATER DEPT’s next Consumer Confidence Report due?: OSKALOOSA MUNICIPAL WATER DEPT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does OSKALOOSA MUNICIPAL WATER DEPT have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for OSKALOOSA MUNICIPAL WATER DEPT.
What is a Consumer Confidence Report?: A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

OSKALOOSA MUNICIPAL WATER DEPT

641-673-8476

OSKALOOSA, IA 52577