Clean Air Act stationary source · ICIS-AIR SD0000004601302060
NORTHWESTERN ENERGY PUBLIC SERVICE CORPORATION - ABERDEEN, Aberdeen, SD: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 10Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 0Formal enforcement actions since January 1, 2017
NORTHWESTERN ENERGY PUBLIC SERVICE CORPORATION - ABERDEEN, at 38726 135TH ST, Aberdeen in Brown County, South Dakota, is an operating major 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 “No Violation Identified”. 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 | NORTHWESTERN ENERGY PUBLIC SERVICE CORPORATION - ABERDEEN |
|---|---|
| ICIS-AIR ID | SD0000004601302060 |
| EPA facility registry ID | 110007186099 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 38726 135TH ST, Aberdeen, SD 57401- |
| County | Brown County |
| In a nonattainment county | No (EPA Green Book) |
| Industry (NAICS) | NAICS 9999 |
| SIC code | 4911 |
| EPA region | 08 |
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 NORTHWESTERN ENERGY PUBLIC SERVICE CORPORATION - ABERDEEN 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
- 10Evaluations since January 1, 2017
- 10Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| July 29, 2026 | FCE On-Site | State | Title V Permits |
| June 18, 2025 | FCE On-Site | State | Title V Permits |
| May 7, 2024 | FCE On-Site | State | Title V Permits |
| June 21, 2023 | FCE On-Site | State | Title V Permits |
| May 3, 2022 | FCE On-Site | State | Title V Permits |
| August 18, 2021 | FCE On-Site | State | Title V Permits |
| September 16, 2020 | FCE On-Site | State | New Source Performance Standards |
| August 22, 2019 | FCE On-Site | State | New Source Performance Standards |
| May 9, 2018 | FCE On-Site | State | Acid Rain Deposition Control (CAA Title IV); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| May 17, 2017 | FCE On-Site | State | Acid Rain Deposition Control (CAA Title IV); New Source Performance Standards; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
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 29, 2020 | Earliest FRV determination | Local | Title V Permits |
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
EPA’s informal action file holds no notice or warning for ICIS-AIR SD0000004601302060 since January 1, 2017.
Stack tests
- 8Stack tests since January 1, 2017
- 0Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| October 22, 2025 | Pass | State |
| December 11, 2024 | Pass | State |
| October 25, 2023 | Pass | State |
| October 26, 2022 | Pass | State |
| October 6, 2021 | Pass | State |
| November 11, 2020 | Pass | State |
| November 28, 2018 | Pass | State |
| November 7, 2017 | Pass | 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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How we handle your data → Privacy
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 110007186099 there.
Nearby on the register
- Air-emissions sources in Brown County
- Every source record in Brown County, A to Z
- Air-emissions sources in South Dakota
- Every source record in South Dakota, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.