EPA TRI Facility · Petroleum
Marathon Mandan Refinery
Mandan, ND · Parent: Marathon Petroleum Corp
- Total releases
- 1.9M lbs
- Chemicals reported
- 40
- Carcinogens
- 12
- Primary pathway
- Air Releases
AIR Form-R mix
Marathon Mandan Refinery: how the 1.9M lbs splits
1.9M lbs across all reported pathways
- Air Releases 1.8M lbs 97.0%
- Off-site Transfers 31.8K lbs 1.7%
- Water Discharges 15.4K lbs 0.8%
- Land Disposal 9.0K lbs 0.5%
Marathon Mandan Refinery's 1.9M lbs Form-R total is AIR - air releases is 97.0% of the bar. Next segment: off-site transfers at 1.7%. Leading chemical by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
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.
HEAVY volume AIR pathway CARC-LEAN
Marathon Mandan Refinery is an EPA Toxics Release Inventory reporter in Mandan, ND, in the petroleum sector. It reported 377.8K lbs of releases across 39 chemicals in 2023, and 1.9M lbs in total across its 2019-2023 reporting years. That ranks 881 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: Rm Heskett Station; Bobcat-Doosan; Knife River North Central Bismarck Rock Island; Forterra Concrete Products - Menoken. Similar-scale Petroleum peers outside North Dakota: Valero Three Rivers Refinery; Ees Coke Battery LLC; Torrance Refining Co LLC; Alon Usa-Big Spring Refinery. Other Marathon Petroleum Corp sites in this extract: Blanchard Refining Co LLC; Marathon Petroleum Co LP; Catlettsburg Refining LLC; Blacks Fork Gas Plant. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Propylene; Xylene (mixed isomers); Toluene.
Marathon Mandan Refinery stamps HEAVY volume with a dominant AIR pathway (97.0% air releases) across 40 chemicals · 12 carcinogen-classified. Cumulative Form-R extract: 1.9M lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Valero Three Rivers Refinery and Ees Coke Battery LLC.
Marathon Mandan Refinery vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
1.9M lbs Top 3% higher than 97% 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
Marathon Mandan Refinery inside Morton's TRI pounds
Among the 902 Petroleum facilities in this database, Marathon Mandan Refinery reports the 51st-largest volume, placing it in the top 5.7% of its sector. This one site accounts for 59.7% of every pound reported in Morton. Scale peers outside North Dakota include Valero Three Rivers Refinery and Ees Coke Battery LLC.
County-dominant here means ≥25% of Morton's reported pounds (3.2M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Marathon Mandan Refinery's total reported releases fell from 424.1 thousand lb in 2022 to 377.8 thousand lb in 2023, based on EPA TRI filings.
- Marathon Mandan Refinery's air releases fell from 409.4 thousand lb in 2022 to 362.3 thousand lb in 2023, based on EPA TRI filings.
- Marathon Mandan Refinery's water releases rose from 5.1 thousand lb in 2022 to 5.6 thousand lb in 2023, based on EPA TRI filings.
- Marathon Mandan Refinery's off-site transfers rose from 8.0 thousand lb in 2022 to 8.3 thousand lb in 2023, based on EPA TRI filings.
Marathon Mandan Refinery Form-R facts
Compare this facility
See how Marathon Mandan Refinery stacks up against nearby facilities and the typical reporter.
79% more than the comparison
4.4× more 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 Marathon Mandan Refinery releases toxic chemicals into the environment. Total: 1.9M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 7% (352.9K lbs to 377.8K lbs).
Marathon Mandan Refinery: annual Form-R pounds
HEAVY site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Marathon Mandan Refinery year-over-year reported totals (increased by 7% from 2019 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: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 352.9K lbs | 36 |
| 2020 | 359.7K lbs | 38 |
| 2021 | 381.7K lbs | 36 |
| 2022 | 424.1K lbs | 38 |
| 2023 | 377.8K lbs | 39 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 12 of 40 chemicals are carcinogens. Sorted by total release volume.
Marathon Mandan Refinery · AIR-pathway site
Nearest TRI Facilities to Marathon Mandan Refinery
Closest other reporters in North Dakota - including Rm Heskett Station, Bobcat-Doosan, Knife River North Central Bismarck Rock Island, ordered by distance.
Showing 8 of 93 other reporting facilities in North Dakota.
Similar Petroleum Facilities
Other Petroleum facilities with similar total release volumes (±80%), outside North Dakota - e.g. Valero Three Rivers Refinery, Ees Coke Battery LLC, Torrance Refining Co LLC.
Compare beyond North Dakota
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Marathon Mandan Refinery on cumulative reported pounds (1.9M lbs) and distinct chemical count (40). Release-pound peers include Ticona Polymers Inc, Ferroglobe USA Metallurgical Inc, Cottonseed Co-Op Corp. Chemical-count peers include Cleveland-Cliffs Steel LLC, Hf Sinclair el Dorado Refining LLC, Coffeyville Resources Nitrogen Fertilizers LLC. 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.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Cleveland-Cliffs Steel LLC East Chicago, IN · Primary Metals 40 chemicals
- Hf Sinclair el Dorado Refining LLC El Dorado, KS · Petroleum 40 chemicals
- Coffeyville Resources Nitrogen Fertilizers LLC Coffeyville, KS · Chemicals 40 chemicals
- Valero Refining - New Orleans LLC Norco, LA · Petroleum 40 chemicals
Other Marathon Petroleum Corp Facilities
Same-parent TRI sites ranked by reported releases - including Blanchard Refining Co LLC, Marathon Petroleum Co LP, Catlettsburg Refining LLC.
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 Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Propylene, Xylene (mixed isomers), Toluene; nearby reporters include Rm Heskett Station. Marathon Mandan Refinery stamps HEAVY volume · AIR 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 Marathon Mandan Refinery TRI extract (HEAVY · AIR · CARC-LEAN · lead Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Marathon Mandan Refinery totals are self-reported EPCRA §313 estimates for Mandan, ND, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 324110 · Petroleum. 59.7% of Morton TRI pounds in this extract. Nearest ABS peer: Ticona Polymers Inc (Δ 5.9K lbs). Pounds ≠ exposure.
Marathon Mandan Refinery stamps HEAVY volume · AIR pathway · CARC-LEAN · lead Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size). PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. 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