Oneok Inc
15 facilities · 5 states · 32.8M lbs total releases
Oneok Inc operates 15 facilities reporting to the EPA Toxics Release Inventory, with combined releases of 32.8M lbs. 6 of the 63 chemicals reported are classified as carcinogens.
Oneok Inc appears in the EPA Toxics Release Inventory as the parent or reported corporate owner of 15 individual facilities filing Form R disclosures under EPCRA Section 313. Operations span 5 states, and across all sites the company has disclosed a cumulative release total of 32.8M lbs.
The aggregated chemical footprint covers 63 distinct substances, of which 6 carry a carcinogen classification in the EPA Toxics Release Inventory. The heaviest-reporting state by release volume is North Dakota (6 facilities, 27.1M lbs), followed by Kansas at 5.2M lbs. The single largest facility disclosure is ONEOK ROCKIES MIDSTREAM LLC - GRASSLANDS GAS PLANT in ND at 26.9M lbs.
Parent-company aggregation uses the company name as reported by each facility on its annual TRI filing; mergers, divestitures, or reporting variations across subsidiaries can produce inconsistent attribution year over year. All values are self-reported estimates under federal community right-to-know law and are not weighted by toxicity. Inclusion in the TRI does not establish a health risk to the public, it documents the regulatory disclosure record.
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| North Dakota | 6 | 27.1M lbs |
| Kansas | 3 | 5.2M lbs |
| Oklahoma | 2 | 275.2K lbs |
| Texas | 3 | 173.8K lbs |
| Wyoming | 1 | 11.7K lbs |
Facilities (15)
| Facility | Releases |
|---|---|
| Oneok Rockies Midstream LLC - Grasslands Gas Plant Alexander, ND | 26.9M lbs |
| Oneok Hydrocarbon LP - Bushton Complex Bushton, KS | 5.2M lbs |
| Canadian Valley Gas Plant Calumet, OK | 173.8K lbs |
| Magellan Processing L.P. Corpus Christi, TX | 124.8K lbs |
| Oneok Field Svc/maysville Gas Plt Maysville, OK | 101.4K lbs |
| Garden Creek Gas Plant Watford City, ND | 56.0K lbs |
| Demicks Lake Gas Plant Watford City, ND | 49.3K lbs |
| Oneok Hydrocarbon L.P. - Mont Belvieu Ngl Fractionation (mb Baytown, TX | 45.8K lbs |
| Bear Creek Gas Plant Killdeer, ND | 32.4K lbs |
| Lonesome Creek Gas Plant Alexander, ND | 28.1K lbs |
| Stateline Complex Williston, ND | 24.9K lbs |
| Sage Creek Gas Plant Glenrock, WY | 11.7K lbs |
| Oneok Hydrocarbon L.P. - Hutchinson Fractionation Facility Hutchinson, KS | 11.2K lbs |
| Mont Belvieu Fractionator Mont Belvieu, TX | 3.3K lbs |
| Oneok Hydrocarbon LP McPherson Butane Isomerization Plant Mcpherson, KS | 0 lbs |
Frequently Asked Questions
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About This Data
Parent company data comes from the EPA Toxics Release Inventory (TRI). Release totals include all media (air, water, land, off-site transfers). Company names are reported as-is by facilities; some variations may refer to the same corporate entity.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files U.S. Environmental Protection Agency, TRI Basic Data Files
Read our methodology - how this data is sourced, computed, and verified.
Related
Every figure on PlainEnviro is rendered directly from EPA environmental compliance data, no number is typed in by an editor. Company release figures are computed directly from EPA Toxic Release Inventory data. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.