Clean Air Act stationary source · ICIS-AIR ND0000003810500179
ONEOK ROCKIES MIDSTREAM, L.L.C. - STATELINE GAS PLANT - AQ, Williston, ND: Clean Air Act compliance record, inspections, violations, penalties
- OperatingOperating status
- Major sourceEmissions classification
- No Violation IdentifiedCurrent violation status, as filed
- 5Compliance evaluations since January 1, 2017
- 0High-priority violations since January 1, 2017
- 0Formal enforcement actions since January 1, 2017
ONEOK ROCKIES MIDSTREAM, L.L.C. - STATELINE GAS PLANT - AQ, at 15071 - 56TH STREET NW, Williston in Williams County, North 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 | ONEOK ROCKIES MIDSTREAM, L.L.C. - STATELINE GAS PLANT - AQ |
|---|---|
| ICIS-AIR ID | ND0000003810500179 |
| EPA facility registry ID | 110067047859 |
| Operating status | Operating |
| Emissions classification | Major source |
| Current violation status (ICIS-AIR high-priority violation field) | No Violation Identified |
| Address | 15071 - 56TH STREET NW, Williston, ND 58801 |
| County | Williams County |
| In a nonattainment county | No (EPA Green Book) |
| Industry (NAICS) | Oil and gas extraction (NAICS 2111) |
| SIC code | 1321 |
| 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 ONEOK ROCKIES MIDSTREAM, L.L.C. - STATELINE GAS PLANT - AQ 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
- 5Evaluations since January 1, 2017
- 4Full compliance evaluations
| Date | What EPA recorded | Agency | Programs |
|---|---|---|---|
| July 16, 2025 | PCE On-Site | U.S. EPA | MACT Standards (40 CFR Part 63); New Source Performance Standards |
| August 14, 2024 | FCE On-Site | State | Stratospheric Ozone Protection; 40 CFR Part 63 Area Sources; New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| September 29, 2022 | FCE On-Site | State | Stratospheric Ozone Protection; 40 CFR Part 63 Area Sources; New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| August 18, 2020 | FCE On-Site | State | Stratospheric Ozone Protection; 40 CFR Part 63 Area Sources; New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
| August 21, 2018 | FCE On-Site | State | Stratospheric Ozone Protection; 40 CFR Part 63 Area Sources; New Source Performance Standards; State or Local rule or regulation that is not federally-enforceable; State Implementation Plan for National Primary and Secondary Ambient Air Quality Standards; Title V Permits |
Violations
- 0Violation 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.
EPA’s violation history file holds no violation for ICIS-AIR ND0000003810500179 since January 1, 2017.
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 ND0000003810500179 since January 1, 2017.
Stack tests
- 3Stack tests since January 1, 2017
- 0Recorded as failed
| Date | What EPA recorded | Agency |
|---|---|---|
| September 18, 2024 | Pass | State |
| October 1, 2021 | Pass | State |
| October 11, 2018 | 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 110067047859 there.
Nearby on the register
- Air-emissions sources in Williams County
- Every source record in Williams County, A to Z
- Air-emissions sources in North Dakota
- Every source record in North Dakota, A to Z
Figures from EPA’s ICIS-AIR download, loaded September 14, 2026.