DIAGONAL, IA · Ringgold County
DIAGONAL WATER DEPARTMENT Water System
Consumer Confidence Report status
DIAGONAL 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 2 items for DIAGONAL WATER DEPARTMENT that are open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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)
- IA8018040
- System type
- Community Water System
- Population served
- 338
- Service connections
- 133
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
DIAGONAL WATER DEPARTMENT is one of 1,221 community water systems in Iowa in the 500 or fewer people size category, serving 338 people from surface water.
As of August 1, 2026, its federal record holds 7 entries between 2011 and 2025, of which 2 remain open; none are health-based.
Of the 7, 6 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 Total Coliform Rules, inorganic chemicals, and the Lead and Copper Rule.
Violation history
Follow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
June 1, 2025
UnaddressedPublic Notification Violation for NPDWR Violation
—Public Notice
March 21, 2025
UnaddressedMonitoring, Regular
—Nitrite
October 1, 2024 – December 31, 2024
ResolvedMonitoring, Regular
—Nitrite
January 1, 2024 – March 31, 2024
ResolvedMonitoring, Routine (RTCR)
—Revised Total Coliform Rule
August 1, 2021 – August 31, 2021
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
July 1, 2015 – July 31, 2015
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
May 1, 2011 – May 31, 2011
Resolved
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 1, 2025 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Unaddressed |
| March 21, 2025 | Public Notification Violation for NPDWR Violation | Public Notice | — | Unaddressed |
| October 1, 2024 – December 31, 2024 | Monitoring, Regular | Nitrite | — | Resolved |
| January 1, 2024 – March 31, 2024 | Monitoring, Regular | Nitrite | — | Resolved |
| August 1, 2021 – August 31, 2021 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| July 1, 2015 – July 31, 2015 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| May 1, 2011 – May 31, 2011 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
Unaddressed no corrective action on record yetResolved addressed and confirmed by the state
Enforcement actions
- February 16, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
Common questions
Is DIAGONAL WATER DEPARTMENT required to publish a Consumer Confidence Report?
- Yes. DIAGONAL 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 DIAGONAL WATER DEPARTMENT’s next Consumer Confidence Report due?
- DIAGONAL WATER DEPARTMENT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does DIAGONAL WATER DEPARTMENT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 2 items for DIAGONAL WATER DEPARTMENT that are open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.
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
DIAGONAL WATER DEPARTMENT
641-344-4609
DIAGONAL, IA 50845