UNDERWOOD, IA · Pottawattamie County
TREYNOR WATER DEPARTMENT Water System
Consumer Confidence Report status
TREYNOR WATER DEPARTMENT 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 TREYNOR WATER DEPARTMENT.
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)
- IA7866031
- System type
- Community Water System
- Population served
- 1,049
- Service connections
- 495
- Ownership
- local government
- Water source
- groundwater (wells)
TREYNOR WATER DEPARTMENT is one of 403 community water systems in Iowa in the 501 to 3,300 people size category, serving 1,049 people from groundwater.
As of August 1, 2026, its federal record holds 3 entries between 2021 and 2024, all of which EPA lists as closed.
All 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 the Stage 2 Disinfectants and Disinfection Byproducts Rule and inorganic chemicals.
Violation history
Monitoring, Regular
—Nitrite
October 1, 2024 – September 30, 2025
ResolvedMonitoring and Reporting (DBP)
—TTHM
July 1, 2021 – July 31, 2021
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
July 1, 2021 – July 31, 2021
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2024 – September 30, 2025 | Monitoring, Regular | Nitrite | — | Resolved |
| July 1, 2021 – July 31, 2021 | Monitoring and Reporting (DBP) | TTHM | — | Resolved |
| July 1, 2021 – July 31, 2021 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- December 30, 2025State Public Notification requested1 linked violation
- December 30, 2025State Public Notification requested1 linked violation
- December 1, 2025State Public Notification received1 linked violation
- December 1, 2025State Public Notification received2 linked violations
- December 1, 2025State Public Notification received2 linked violations
- October 23, 2025State Compliance achieved1 linked violation
- October 23, 2025State Compliance achieved3 linked violations
- October 22, 2025State Formal Notice of Violation issued2 linked violations
- October 22, 2025State Public Notification requested1 linked violation
- October 26, 2022State Public Notification received6 linked violations
- October 28, 2013State Public Notification received21 linked violations
- February 23, 1996State Formal Notice of Violation issued5 linked violations
Common questions
Is TREYNOR WATER DEPARTMENT required to publish a Consumer Confidence Report?
- Yes. TREYNOR WATER DEPARTMENT 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 TREYNOR WATER DEPARTMENT’s next Consumer Confidence Report due?
- TREYNOR WATER DEPARTMENT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does TREYNOR WATER DEPARTMENT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for TREYNOR WATER DEPARTMENT.
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
TREYNOR WATER DEPARTMENT
402-980-9225
UNDERWOOD, IA 57576