EPA TRI Facility · Natural Gas Processing
Stateline Complex
Williston, ND · Parent: Oneok Inc.
- Total releases
- 24.9K lbs
- Chemicals reported
- 3
- Carcinogens
- 1
- Primary pathway
- Off-site Transfers
MIXED Form-R mix
Stateline Complex: how the 24.9K lbs splits
24.9K lbs across all reported pathways
- Off-site Transfers 15.1K lbs 60.7%
- Air Releases 9.8K lbs 39.3%
Stateline Complex's 24.9K lbs Form-R total is MIXED - off-site transfers is 60.7% of the bar. Next segment: air releases at 39.3%. Leading chemical by pounds: n-Hexane.
Carcinogen-classified pounds vs other reported pounds
Same cumulative TRI total as above, split by EPA/IARC carcinogen classification on each chemical: pounds share, not chemical count. Classification is not a site health-risk score.
LIGHT volume MIXED pathway CARC-LEAN
Stateline Complex is an EPA Toxics Release Inventory reporter in Williston, ND, in the natural gas processing sector. It reported 12.3K lbs of releases across 3 chemicals in 2023, and 24.9K lbs in total across its 2022-2023 reporting years. That ranks 7,749 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In North Dakota's 94 reporting TRI sites, Basin Electric Antelope Valley Station leads both reported pounds (167.8M lbs) and chemical count (55 chemicals). The two rankings do not invert in this pool. Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Championx-Williston; Halliburton Williston Field Camp (halwest); Thomas Petroleum LLC - Williston North Bulk Plant; Knife River North Central Williston. Similar-scale Natural Gas Processing peers outside North Dakota: Waynoka Gas Plant; Dubach Gas Plant; Williams Ohio Valley Midstream - Moundsville Fractionation P; Grady Gas Plant. Other Oneok Inc. sites in this extract: Oneok Hydrocarbon L.P. - Mont Belvieu Ngl Fractionation (mb; Mont Belvieu Fractionator. Largest disclosed chemicals by pounds: n-Hexane; Benzene; Methanol.
Stateline Complex is a LIGHT · MIXED-pathway Form-R site in Williston, ND: 24.9K lbs across 3 chemicals (1 carcinogen-classified, CARC-LEAN). No single media clears 70% of the bar (lead segment off-site transfers at 60.7%). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Waynoka Gas Plant and Dubach Gas Plant.
Stateline Complex vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
25K lbs Top 30% higher than 70% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Stateline Complex inside Williams's TRI pounds
Among the 339 Natural Gas Processing facilities in this database, Stateline Complex reports the 163rd-largest volume (24.9K lbs). This one site accounts for 28.8% of every pound reported in Williams. Its reported volume is concentrated rather than spread: n-Hexane alone is 95.2% of the total. Scale peers outside North Dakota include Waynoka Gas Plant and Dubach Gas Plant.
County-dominant here means ≥25% of Williams's reported pounds (86.4K lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Stateline Complex's total reported releases fell from 12.5 thousand lb in 2022 to 12.3 thousand lb in 2023, based on EPA TRI filings.
- Stateline Complex's off-site transfers fell from 7.6 thousand lb in 2022 to 7.5 thousand lb in 2023, based on EPA TRI filings.
- Stateline Complex's air releases fell from 4.9 thousand lb in 2022 to 4.9 thousand lb in 2023, based on EPA TRI filings.
Stateline Complex Form-R facts
Compare this facility
See how Stateline Complex stacks up against nearby facilities and the typical reporter.
2.1× more than the comparison
67% less than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Stateline Complex releases toxic chemicals into the environment. Total: 24.9K lbs.
Emissions Trend Summary
From 2022 to 2023, total releases decreased by 2% (12.5K lbs to 12.3K lbs).
Stateline Complex: annual Form-R pounds
LIGHT site · MIXED pathway · TRI years 2022–2023
- 2022 0
- 2023 0
What this shows Stateline Complex year-over-year reported totals (decreased by 2% from 2022 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: n-Hexane.
| Year | Total | Chemicals |
|---|---|---|
| 2022 | 12.5K lbs | 3 |
| 2023 | 12.3K lbs | 3 |
Stateline Complex in Williams
Nearest TRI Facilities to Stateline Complex
Closest other reporters in North Dakota - including Championx-Williston, Halliburton Williston Field Camp (halwest), Thomas Petroleum LLC - Williston North Bulk Plant, ordered by distance.
Showing 8 of 93 other reporting facilities in North Dakota.
Similar Natural Gas Processing Facilities
Other Natural Gas Processing facilities with similar total release volumes (±80%), outside North Dakota - e.g. Waynoka Gas Plant, Dubach Gas Plant, Williams Ohio Valley Midstream - Moundsville Fractionation P.
Compare beyond North Dakota
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Stateline Complex on cumulative reported pounds (24.9K lbs) and distinct chemical count (3). Release-pound peers include Lfm Laurel East, Saint-Gobain Abrasives, Oliver Rubber Co. Chemical-count peers include Industrial C&s of Pr LLC Arecibo Plant, Island Litho Corp., Fenwal International Inc. Neighborhoods are forced disjoint so each axis surfaces a different set of sites.
Similar reported release pounds
Nearest out-of-state reporters (≥1,000 lbs) by absolute TRI pounds, not same-industry or same-county neighbors.
- Lfm Laurel East Laurel, MT · Plastics and Rubber 24.9K lbs reported
- Saint-Gobain Abrasives Watervliet, NY · Nonmetallic Mineral Product 24.9K lbs reported
- Oliver Rubber Co Asheboro, NC · Plastics and Rubber 24.9K lbs reported
- Citgo Petroleum Corp Cicero Lubricants Manufacturing Plant Cicero, IL · Petroleum 24.9K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Oneok Inc. Facilities
Same-parent TRI sites ranked by reported releases - including Oneok Hydrocarbon L.P. - Mont Belvieu Ngl Fractionation (mb, Mont Belvieu Fractionator.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include n-Hexane, Benzene, Methanol; nearby reporters include Championx-Williston. Stateline Complex stamps LIGHT volume · MIXED pathway · CARC-LEAN carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Stateline Complex TRI extract (LIGHT · MIXED · CARC-LEAN · lead n-Hexane) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Stateline Complex totals are self-reported EPCRA §313 estimates for Williston, ND, latest year 2023. Form-R rows span 2022–2023 (2 years). NAICS 211130 · Natural Gas Processing. 28.8% of Williams TRI pounds in this extract. Nearest ABS peer: Lfm Laurel East (Δ 5 lbs). Pounds ≠ exposure.
Stateline Complex stamps LIGHT · MIXED pathway (off-site transfers leads at 60.7%). Pipeline-rendered EPA Form-R only - no editor-typed pounds. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov