EPA enforcement actions against wastewater plants in Idaho
104 formal actions at 54 of 94 plants · $1.2M in penalties · 6 EPA inspections
EPA's enforcement records list 104 formal civil enforcement cases naming publicly owned wastewater treatment plants in Idaho, 17 of them since fiscal year 2020. The cases involve 54 of the state's 94 plants, with $1.2 million in penalties assessed. The most common ground is npdes permit violations (74 cases). EPA has inspected 5 plants in the state, 6 inspections in total. Every plant links to its profile, and every case to its report on EPA's ECHO site.
Recent enforcement actions in Idaho
| Plant | Date | Type | Law section | Outcome | Penalty | Source |
|---|---|---|---|---|---|---|
| St Maries WWTP Saint Maries | Sep 2026 FY2026 | Administrative order | NPDES Discharge without a Permit | Final Order With Penalty | $6,534 | ECHO 10-2026-0220 |
EPA's description: “On August 4, 2026, Region 10 issued an administrative order on consent to City of St. Maries for its Wastewater Treatment Plant (WWTP). City of St. Maries failed to reapply for their NPDES Permit and…” | ||||||
| Craigmont WWTP Craigmont | Aug 2026 FY2021 | Administrative order | NPDES Permit Violations | Final Order No Penalty | — | ECHO 10-2021-0117 |
EPA's description: “EPA Region 10 and City of Craigmont located in Craigmont, Idaho agreed to settlement for CWA violations of the City?s NPDES Permit No. ID 0021288. The City exceeded effluent limits for E. coli, total…” | ||||||
| Kamiah Regional STP Kamiah | Aug 2026 FY2026 | Administrative order | NPDES Permit Violations | Final Order No Penalty | — | ECHO 10-2026-0177 |
EPA's description: “On August 4, 2026, Region 10 issued an Administrative Order on Consent to the City of Kamiah for its wastewater treatment facility located in Kamiah, Idaho. The order will require the City to conduct…” | ||||||
| St Maries WWTP Saint Maries | Aug 2026 FY2026 | Administrative order | NPDES Discharge without a Permit | Final Order No Penalty | — | ECHO 10-2026-0219 |
EPA's description: “On , Region 10 issued an administrative order on consent to City of St. Maries for its Wastewater Treatment Plant (WWTP). City of St. Maries failed to reapply for their NPDES Permit and had effluent…” | ||||||
| Winchester WWTP Winchester | Dec 2025 FY2021 | Administrative order | NPDES Permit Violations | Final Order No Penalty | — | ECHO 10-2021-0118 |
EPA's description: “The City of Winchester has agreed to enter into an Administrative Compliance Order on Consent (AOC) to ensure compliance with its NPDES permit. The City exceeded their effluent limits in their NPDES…” | ||||||
| Driggs WWTP Driggs | Nov 2025 FY2022 | Judicial case | NPDES Permit Violations | Final Order With Penalty | $400,000 | ECHO 10-2022-0029 |
EPA's description: “On November 20, 2025, the US District Court for the District of Idaho granted the United States? unopposed motion to enter the consent decree in the United States v. the City of Driggs, Idaho, and…” | ||||||
| Ahsahka Wastewater Treatment Plant Orofino | Dec 2024 FY2024 | Administrative order | NPDES Permit Violations | Final Order With Penalty | $775 | ECHO 10-2024-0148 |
EPA's description: “On December 4, 2024, Region 10 filed an expedited settlement agreement resolving CWA violations of Ahsahka Water and Sewer District's permit at its wastewater facility in Ahsahka, Idaho. Alleged…” | ||||||
| Cambridge WWTP Cambridge | Aug 2024 FY2024 | Administrative order | NPDES Permit Violations | Final Order With Penalty | $638 | ECHO 10-2024-0133 |
EPA's description: “On August 7, 2024, Region 10 filed an expedited settlement agreement resolving CWA violations at the City of Cambridge Wastewater Treatment Plant located in Cambridge, Idaho. Alleged violations…” | ||||||
| Emida Waste Water Facility Saint Maries | Jul 2024 FY2024 | Administrative order | NPDES Permit Violations | Final Order With Penalty | $1,025 | ECHO 10-2024-0075 |
EPA's description: “On July 30, 2024, Region 10 filed an expedited settlement agreement resolving CWA violations at the Emida Water and Sewer Association, Inc's wastewater treatment plant located in Emida, Idaho.…” | ||||||
| Pierce WWTP Pierce | Jul 2024 FY2024 | Administrative order | NPDES Permit Violations | Final Order With Penalty | $1,656 | ECHO 10-2024-0091 |
EPA's description: “On July 30, 2024, Region 10 filed an expedited settlement agreement resolving CWA violations at the City of Pierce's wastewater treatment plant located in Pierce, Idaho. Alleged violations included…” | ||||||
Full case histories, milestones, violation types and EPA's complete case summaries for every plant are shown with a free Klarifi account. Create one
Largest penalties in Idaho
| # | Plant | Date | Type | Outcome | Penalty | Compliance actions | Source |
|---|---|---|---|---|---|---|---|
| 1 | Driggs WWTP Driggs | Nov 2025 FY2022 | Judicial case | Final Order With Penalty | $400,000 | $25M | ECHO 10-2022-0029 |
| 2 | Moscow STP Moscow | Jul 2007 FY2007 | Administrative order | Final Order With Penalty | $134,000 | $1.9M | ECHO 10-2007-0114 |
| 3 | Jerome WWTP Jerome | Jul 2015 FY2012 | Judicial case | Final Order With Penalty | $86,000 | $43M | ECHO 10-2012-0210 |
| 4 | Emmett WWTP Emmett | Apr 2005 FY2005 | Administrative order | Final Order With Penalty | $62,000 | $20,000 | ECHO 10-2005-0053 |
| 5 | Buhl WWTP Buhl | May 2005 FY2005 | Administrative order | Final Order With Penalty | $38,000 | $120,000 | ECHO 10-2005-0084 |
| 6 | St Anthony Sewage Lagoon Saint Anthony | Sep 2005 FY2005 | Administrative order | Final Order With Penalty | $33,000 | $2.5M | ECHO 10-2005-0230 |
| 7 | Genesee WWTP Genesee | Sep 2018 FY2018 | Administrative order | Final Order With Penalty | $30,000 | — | ECHO 10-2018-0357 |
| 8 | Rexburg WWTP Rexburg | Jan 2012 FY2012 | Administrative order | Final Order With Penalty | $30,000 | $2,000 | ECHO 10-2012-0013 |
| 9 | Rexburg WWTP Rexburg | Jun 2016 FY2016 | Administrative order | Final Order With Penalty | $22,000 | — | ECHO 10-2016-9999 |
| 10 | Page WWTP Smelterville | Feb 2015 FY2015 | Administrative order | Final Order With Penalty | $20,000 | — | ECHO 10-2015-0002 |
Actions by fiscal year
| Fiscal year | Formal actions | Penalties |
|---|---|---|
| FY2018 | 17 | $105,000 |
| FY2019 | 3 | $9,250 |
| FY2020 | 0 | — |
| FY2021 | 4 | $30,000 |
| FY2022 | 3 | $402,500 |
| FY2023 | 0 | — |
| FY2024 | 7 | $13,511 |
| FY2025 | 0 | — |
| FY2026 | 3 | $6,534 |
| FY2027 | 0 | — |
EPA fiscal years run from 1 October to 30 September. The current year is partial.
EPA enforcement in Idaho: questions
How many EPA enforcement actions have been taken against wastewater plants in Idaho?
EPA's enforcement records list 104 formal civil enforcement cases naming publicly owned wastewater treatment plants in Idaho, 17 of them since fiscal year 2020. They involve 54 of the state's 94 plants. Informal actions such as notices of violation are not counted here.
Which Idaho wastewater plant received the largest EPA penalty?
Driggs WWTP in Driggs: $400,000 assessed in fiscal year 2022 (CITY OF DRIGGS, Final Order With Penalty). Penalties are the amounts EPA records as assessed or agreed, not necessarily what was collected.
What does an EPA administrative order mean for a wastewater plant?
Most cases here are administrative orders under section 309 of the Clean Water Act: EPA finds permit violations, usually effluent limits or discharge without a permit, and orders the plant to return to compliance, often with a corrective action plan, a schedule and sometimes a penalty. Judicial cases go through the Department of Justice and typically end in a consent decree with a capital programme behind it. The latest case in Idaho is from Sep 2026.
Enforcement data: EPA ICIS-FE&C civil enforcement cases and ICIS compliance inspections, via ECHO. Penalties are the amounts assessed or agreed in each case as EPA records them. Latest case status in this data: Sep 2026.
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