JOHNSTON, IA · Polk County
JOHNSTON MUNICIPAL WATER SUPPLY Water System
Consumer Confidence Report status
JOHNSTON 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 JOHNSTON 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)
- IA7740011
- System type
- Community Water System
- Population served
- 24,897
- Service connections
- 7,657
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
JOHNSTON MUNICIPAL WATER SUPPLY is one of 50 community water systems in Iowa in the 10,001 to 100,000 people size category, serving 24,897 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 1993 and 2006, all of which EPA lists as closed. Nothing has been added since 2006.
All 2 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 1 Disinfectants and Disinfection Byproducts Rule and the Total Coliform Rules.
Violation history
Monitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
January 1, 2006 – March 31, 2006
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
July 1, 1993 – July 31, 1993
Archived
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, 2006 – March 31, 2006 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| July 1, 1993 – July 31, 1993 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- July 3, 2013State Public Notification received2 linked violations
- May 23, 2013State Formal Notice of Violation issued1 linked violation
- May 23, 2013State Public Notification requested1 linked violation
- October 5, 2006State Public Notification received37 linked violations
- August 29, 2006State Compliance achievedgeneral compliance action — not tied to a specific violation on record
- August 29, 2006State Compliance achieved2 linked violations
- May 22, 2006State Formal Notice of Violation issued3 linked violations
- November 7, 2003State Public Notification received12 linked violations
- October 20, 2003State Formal Notice of Violation issued39 linked violations
Common questions
Is JOHNSTON MUNICIPAL WATER SUPPLY required to publish a Consumer Confidence Report?
- Yes. JOHNSTON 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 JOHNSTON MUNICIPAL WATER SUPPLY’s next Consumer Confidence Report due?
- JOHNSTON MUNICIPAL WATER SUPPLY’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does JOHNSTON 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 JOHNSTON 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
JOHNSTON, CITY OF
515-278-0822
JOHNSTON, IA 50131