Is DELAWARE MUNICIPAL WATER SUPPLY required to publish a Consumer Confidence Report?

Yes. DELAWARE MUNICIPAL WATER SUPPLY 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 DELAWARE MUNICIPAL WATER SUPPLY’s next Consumer Confidence Report due?

DELAWARE MUNICIPAL WATER SUPPLY’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.

OELWEIN, IA · Delaware County

DELAWARE MUNICIPAL WATER SUPPLY Water System

Consumer Confidence Report status

DELAWARE MUNICIPAL WATER SUPPLY 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 DELAWARE MUNICIPAL WATER SUPPLY.

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): IA2813019
System type: Community Water System
Population served: 142
Service connections: 42
Ownership: local government
Water source: groundwater (wells)

DELAWARE MUNICIPAL WATER SUPPLY is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 142 people from groundwater.

As of August 1, 2026, its federal record holds 8 entries between 1999 and 2009, all of which EPA lists as closed. Nothing has been added since 2009.

All 8 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 inorganic chemicals and the Radionuclides and Revised Rad Rule.

Violation history

Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
April 1, 2009 – March 31, 2018
Resolved
Monitoring, Regular
—
Barium
July 1, 1999 – June 30, 2008
Resolved
Monitoring, Regular
—
Chromium
July 1, 1999 – June 30, 2008
Resolved
Monitoring, Regular
—
Fluoride
July 1, 1999 – June 30, 2008
Resolved
Monitoring, Regular
—
Mercury
July 1, 1999 – June 30, 2008
Resolved
Monitoring, Regular
—
Antimony, Total
July 1, 1999 – June 30, 2008
Resolved
Monitoring, Regular
—
Thallium, Total
July 1, 1999 – June 30, 2008
Resolved
Monitoring, Regular
—
Selenium
July 1, 1999 – June 30, 2008
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
April 1, 2009 – March 31, 2018	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Resolved
July 1, 1999 – June 30, 2008	Monitoring, Regular	Barium	—	Resolved
July 1, 1999 – June 30, 2008	Monitoring, Regular	Chromium	—	Resolved
July 1, 1999 – June 30, 2008	Monitoring, Regular	Fluoride	—	Resolved
July 1, 1999 – June 30, 2008	Monitoring, Regular	Mercury	—	Resolved
July 1, 1999 – June 30, 2008	Monitoring, Regular	Antimony, Total	—	Resolved
July 1, 1999 – June 30, 2008	Monitoring, Regular	Thallium, Total	—	Resolved
July 1, 1999 – June 30, 2008	Monitoring, Regular	Selenium	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

June 25, 2018State Public Notification received3 linked violations
March 21, 2018State Compliance achieved44 linked violations
August 26, 2015State Public Notification received2 linked violations
October 15, 2014State Compliance achieved4 linked violations
January 5, 1996State Public Notification received1 linked violation
December 22, 1995State Formal Notice of Violation issued1 linked violation
December 22, 1995State Public Notification requested1 linked violation
August 14, 1989State Public Notification requested1 linked violation
October 3, 1988State Compliance achieved2 linked violations

Common questions

Is DELAWARE MUNICIPAL WATER SUPPLY required to publish a Consumer Confidence Report?: Yes. DELAWARE MUNICIPAL WATER SUPPLY 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 DELAWARE MUNICIPAL WATER SUPPLY’s next Consumer Confidence Report due?: DELAWARE MUNICIPAL WATER SUPPLY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does DELAWARE MUNICIPAL WATER SUPPLY have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for DELAWARE MUNICIPAL WATER SUPPLY.
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

DELAWARE MUNICIPAL WATER SUPPLY

563-608-9699

OELWEIN, IA 50662