ROCKWELL CITY, IA · Calhoun County
TWIN LAKES UTILITIES Water System
Consumer Confidence Report status
TWIN LAKES UTILITIES 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 TWIN LAKES UTILITIES.
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)
- IA1300101
- System type
- Community Water System
- Population served
- 300
- Service connections
- 400
- Ownership
- privately owned
- Water source
- groundwater (wells)
TWIN LAKES UTILITIES is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 300 people from groundwater.
As of August 1, 2026, its federal record holds 6 entries between 1984 and 2022, all of which EPA lists as closed. Nothing has been added since 2022.
Of the 6, 3 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, the Lead and Copper Rule, and the Total Coliform Rules.
Violation history
Lead Consumer Notice
—Lead and Copper Rule
March 1, 2022 – April 29, 2022
ResolvedMaximum Contaminant Level Violation, Single Sample
Health-basedNitrite
December 1, 2012 – December 31, 2012
ResolvedMaximum Contaminant Level Violation, Average
Health-basedNitrite
October 1, 1998 – September 30, 1999
ResolvedMaximum Contaminant Level Violation, Acute (TCR)
Health-basedColiform (TCR)
August 1, 1998 – August 31, 1998
ResolvedMonitoring, Regular
—Nitrate
October 1, 1988 – December 31, 1988
ResolvedMonitoring, Regular
—Nitrate
October 1, 1984 – September 30, 1987
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| March 1, 2022 – April 29, 2022 | Lead Consumer Notice | Lead and Copper Rule | — | Resolved |
| December 1, 2012 – December 31, 2012 | Maximum Contaminant Level Violation, Single Sample | Nitrite | Health-based | Resolved |
| October 1, 1998 – September 30, 1999 | Maximum Contaminant Level Violation, Average | Nitrite | Health-based | Resolved |
| August 1, 1998 – August 31, 1998 | Maximum Contaminant Level Violation, Acute (TCR) | Coliform (TCR) | Health-based | Resolved |
| October 1, 1988 – December 31, 1988 | Monitoring, Regular | Nitrate | — | Resolved |
| October 1, 1984 – September 30, 1987 | Monitoring, Regular | Nitrate | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- February 1, 2024State Compliance achieved1 linked violation
- January 18, 2024State Formal Notice of Violation issued1 linked violation
- April 29, 2022State Compliance achieved1 linked violation
- April 29, 2022State Compliance achieved1 linked violation
- April 29, 2022State Public Notification received1 linked violation
- April 29, 2022State Public Notification received1 linked violation
- April 21, 2022State Formal Notice of Violation issued1 linked violation
- April 21, 2022State Formal Notice of Violation issued1 linked violation
- August 20, 2013State Compliance achieved1 linked violation
- August 20, 2013State Compliance achieved2 linked violations
- March 7, 2013State Formal Notice of Violation issued2 linked violations
- December 17, 2012State Public Notification received9 linked violations
- December 12, 2012State Formal Notice of Violation issued2 linked violations
- July 15, 2003State Formal Notice of Violation issued4 linked violations
- February 24, 1999State Compliance achieved2 linked violations
- September 3, 1998State Public Notification requested5 linked violations
- May 30, 1996State Compliance achieved3 linked violations
- November 14, 1994State Public Notification received3 linked violations
- March 29, 1989State Compliance achieved2 linked violations
- February 18, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
- February 16, 1982State Unresolved1 linked violation
Common questions
Is TWIN LAKES UTILITIES required to publish a Consumer Confidence Report?
- Yes. TWIN LAKES UTILITIES 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 TWIN LAKES UTILITIES’s next Consumer Confidence Report due?
- TWIN LAKES UTILITIES’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does TWIN LAKES UTILITIES have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for TWIN LAKES UTILITIES.
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
TWIN LAKES UTILITIES
712-297-8616
ROCKWELL CITY, IA 50568