Clean Air Act stationary source · ICIS-AIR IA0000001977700038
KNIFE RIVER MIDWEST LLC-SIOUX CITY-PLT#4, Sioux City, IA: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Synthetic minor sourceEmissions classification
- Violation w/in 1 YearCurrent violation status, as filed
- 0Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 0Formal enforcement actions since January 1, 2017
KNIFE RIVER MIDWEST LLC-SIOUX CITY-PLT#4, at 2220 HAWKEYE DR, Sioux City in Woodbury County, Iowa, is an operating synthetic minor source of air pollution on EPA’s ICIS-AIR register. EPA’s file records its current violation status (ICIS-AIR’s high-priority violation field) as “Violation w/in 1 Year”. The status and classification are as EPA’s facility file stood when Velarion loaded it (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the source’s current standing, quarter by quarter.
Identity
| Facility as filed | KNIFE RIVER MIDWEST LLC-SIOUX CITY-PLT#4 |
|---|---|
| ICIS-AIR ID | IA0000001977700038 |
| EPA facility registry ID | 110002084538 |
| Operating status | Operating |
| Emissions classification | Synthetic minor source |
| Current violation status (ICIS-AIR high-priority violation field) | Violation w/in 1 Year |
| Address | 2220 HAWKEYE DR, Sioux City, IA 51105 |
| County | Woodbury County |
| In a nonattainment county | No (EPA Green Book) |
| Industry (NAICS) | Petroleum and coal products manufacturing (NAICS 3241) |
| SIC code | 2951 |
| EPA region | 07 |
Cited to the EPA ICIS-AIR facility file (ECHO download).
Programs and pollutants
Velarion’s copy of EPA’s ICIS-AIR download does not include its program, pollutant and Title V certification files, so this page does not list the Clean Air Act programs KNIFE RIVER MIDWEST LLC-SIOUX CITY-PLT#4 is under or the pollutants it is permitted for. The programs each evaluation and violation below was recorded under are shown with it. EPA’s free Detailed Facility Report lists both.
Compliance evaluations
- 0Evaluations since January 1, 2017
- 0Full compliance evaluations
EPA’s compliance evaluation file holds no evaluation of ICIS-AIR IA0000001977700038 since January 1, 2017.
Violations
- 1Violation determinations since January 1, 2017
- 0Of them high-priority
A high-priority violation (HPV) is the most serious class of Clean Air Act non-compliance an agency records; a federally reportable violation (FRV) is the next step down. Each row is one determination as EPA’s violation history files it.
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| July 26, 2026 | Earliest FRV determination | State | New Source Performance Standards (Non-Major); State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards |
Enforcement and penalties
0 formal enforcement actions since January 1, 2017, 0 of them with a penalty filed above zero. Each penalty is shown as EPA’s formal action file states it; “Not stated” means the file gives no figure, and $0 is a disclosed zero.
Informal enforcement
| Date | What EPA recorded | Agency |
|---|---|---|
| July 30, 2026 | Notice of Violation | State |
Stack tests
- 3Stack tests since January 1, 2017
- 2Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| July 21, 2026 | Fail | State |
| July 9, 2025 | Pass | State |
| May 16, 2024 | Fail | State |
Cited to the EPA ICIS-AIR evaluation, violation, stack test and enforcement files (ECHO download), events dated January 1, 2017 or later as loaded; up to 50 rows of each shown, newest first.
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EPA publishes a free Detailed Facility Report for every source on ECHO: its compliance status quarter by quarter, its evaluations, and its violations, enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter EPA facility registry ID 110002084538 there.
Nearby on the register
- Air-emissions sources in Woodbury County
- Every source record in Woodbury County, A to Z
- Air-emissions sources in Iowa
- Every source record in Iowa, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.