TWIN FALLS, ID · Twin Falls County
TWIN FALLS CITY OF Water System
Consumer Confidence Report status
TWIN FALLS CITY OF 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 FALLS CITY OF.
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 Idaho’s official records. Always confirm current status with Idaho before making decisions based on this information.
System facts
- System ID (PWSID)
- ID5420058
- System type
- Community Water System
- Population served
- 56,121
- Service connections
- 19,273
- Ownership
- local government
- Water source
- groundwater (wells)
TWIN FALLS CITY OF is among the 7 largest community water systems in Idaho, serving 56,121 people from groundwater.
As of August 1, 2026, its federal record holds 4 entries between 2009 and 2022, all of which EPA lists as closed. Nothing has been added since 2022.
Of the 4, 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 Lead and Copper Rule, the Groundwater Rule, and the Public Notice Rule and Revised PN Rule.
Violation history
Initial, Follow-up, or Routine Source Water M/R
—Lead and Copper Rule
July 1, 2022 – December 11, 2024
ResolvedMonitoring, Source Water (GWR)
—E. COLI
February 17, 2015 – November 16, 2023
ResolvedPublic Notification Violation for NPDWR Violation
—Public Notice
May 5, 2012 – March 31, 2012
ResolvedMaximum Contaminant Level Violation, Average
Health-basedArsenic
July 1, 2009 – September 30, 2009
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2022 – December 11, 2024 | Initial, Follow-up, or Routine Source Water M/R | Lead and Copper Rule | — | Resolved |
| February 17, 2015 – November 16, 2023 | Monitoring, Source Water (GWR) | E. COLI | — | Resolved |
| May 5, 2012 – March 31, 2012 | Public Notification Violation for NPDWR Violation | Public Notice | — | Resolved |
| July 1, 2009 – September 30, 2009 | Maximum Contaminant Level Violation, Average | Arsenic | Health-based | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- August 13, 2025State Violation/Reminder Notice3 linked violations
- February 15, 2024State Public Notification requested2 linked violations
- February 12, 2024State Violation/Reminder Notice1 linked violation
- May 11, 2023State Public Notification requested1 linked violation
- May 8, 2023State Violation/Reminder Notice1 linked violation
- March 3, 2023State Public Notification requested1 linked violation
- March 3, 2023State Public Notification requested1 linked violation
- February 28, 2023State Violation/Reminder Notice1 linked violation
- February 28, 2023State Violation/Reminder Notice1 linked violation
- February 25, 2023State Public Notification requested1 linked violation
- February 22, 2023State Violation/Reminder Notice1 linked violation
- April 9, 2015State Public Notification requested1 linked violation
- April 9, 2015State Public Notification requested1 linked violation
- April 6, 2015State Violation/Reminder Notice1 linked violation
- April 6, 2015State Violation/Reminder Notice1 linked violation
- March 25, 2014State Compliance achieved16 linked violations
- March 25, 2014State Compliance achieved16 linked violations
- November 13, 2012State Bilateral Compliance Agreement signed4 linked violations
- October 30, 2012State Compliance achieved2 linked violations
- June 4, 2012State Public Notification requested3 linked violations
- April 9, 2012State Public Notification received1 linked violation
- April 9, 2012State Compliance achieved2 linked violations
- April 7, 2012State Public Notification requested3 linked violations
- April 7, 2012State Public Notification requested3 linked violations
- March 31, 2012State Compliance achieved1 linked violation
- February 4, 2012State Public Notification requested2 linked violations
- October 6, 2011State Public Notification requested3 linked violations
- July 4, 2011State Public Notification requested3 linked violations
- July 4, 2011State Public Notification requested3 linked violations
- May 4, 2011State Public Notification received1 linked violation
- April 25, 2011State Compliance achieved1 linked violation
- October 4, 2010State Public Notification requested3 linked violations
- August 5, 2010State Public Notification requested6 linked violations
- May 6, 2010State Public Notification requested3 linked violations
- September 23, 1993Federal Proposed Administrative Order Issued2 linked violations
Common questions
Is TWIN FALLS CITY OF required to publish a Consumer Confidence Report?
- Yes. TWIN FALLS CITY OF 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 FALLS CITY OF’s next Consumer Confidence Report due?
- TWIN FALLS CITY OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does TWIN FALLS CITY OF have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for TWIN FALLS CITY OF.
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
BOHLING, ROBERT L
208-736-1540
TWIN FALLS, ID 83301