EPA TRI Facility · Petroleum
Marathon Petroleum Co LP
Garyville, LA · Parent: Marathon Petroleum Corp
- Total releases
- 3.6M lbs
- Chemicals reported
- 45
- Carcinogens
- 14
- Primary pathway
- Air Releases
MIXED Form-R mix
Marathon Petroleum Co LP: how the 3.6M lbs splits
3.6M lbs across all reported pathways
- Air Releases 2.2M lbs 61.6%
- Water Discharges 1.2M lbs 34.1%
- Off-site Transfers 155.3K lbs 4.3%
- Land Disposal 0 lbs <0.1%
Marathon Petroleum Co LP's 3.6M lbs Form-R total is MIXED - air releases is 61.6% of the bar. Next segment: water discharges at 34.1%. Leading chemical by pounds: Nitrate compounds (water dissociable; reportable only when in aqueous solution).
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 MIXED pathway CARC-LEAN
Marathon Petroleum Co LP is an EPA Toxics Release Inventory reporter in Garyville, LA, in the petroleum sector. It reported 795.6K lbs of releases across 38 chemicals in 2023, and 3.6M lbs in total across its 2019-2023 reporting years. That ranks 547 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Louisiana's 417 reporting TRI sites, pounds #1 is not chemical-count #1. Marathon Petroleum Co LP is pounds #32 and chemical-count #9 at 3.6M lbs. Bayer Cropscience LP leads reported pounds (81.9M lbs) at 17 chemicals (chemical-count #52). Eco-Services Operations leads chemical count at 68 chemicals (163.5K lbs, pounds #136). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Air Products & Chemicals Inc - Garyville Smr; Evonik Corp; Clariant Corporation - Reserve Site; Stockhausen Superabsorber LLC. Similar-scale Petroleum peers outside Louisiana: Deer Park Refining LP; Premcor Refining Group Inc Port Arthur; Phillips 66 Rodeo Renewable Energy Complex; Flint Hills Resources Pine Bend LLC. Other Marathon Petroleum Corp sites in this extract: Blanchard Refining Co LLC; Marathon Mandan Refinery; Catlettsburg Refining LLC; Blacks Fork Gas Plant. Largest disclosed chemicals by pounds: Nitrate compounds (water dissociable; reportable only when in aqueous solution); Hydrogen cyanide; Ammonia; Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
Marathon Petroleum Co LP is a HEAVY · MIXED-pathway Form-R site in Garyville, LA: 3.6M lbs across 45 chemicals (14 carcinogen-classified, CARC-LEAN). No single media clears 70% of the bar (lead segment air releases at 61.6%). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Deer Park Refining LP and Premcor Refining Group Inc Port Arthur.
Marathon Petroleum Co LP vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
3.6M lbs Top 2% higher than 98% 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 Petroleum Co LP inside St. John The Baptist Parish's TRI pounds
Among the 902 Petroleum facilities in this database, Marathon Petroleum Co LP reports the 28th-largest volume, placing it in the top 3.1% of its sector. This one site accounts for 35.8% of every pound reported in St. John The Baptist Parish. Scale peers outside Louisiana include Deer Park Refining LP and Premcor Refining Group Inc Port Arthur.
County-dominant here means ≥25% of St. John The Baptist Parish's reported pounds (10.1M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Marathon Petroleum Co LP's total reported releases rose from 723.4 thousand lb in 2022 to 795.6 thousand lb in 2023, based on EPA TRI filings.
- Marathon Petroleum Co LP's off-site transfers rose from 13.5 thousand lb in 2022 to 20.5 thousand lb in 2023, based on EPA TRI filings.
- Marathon Petroleum Co LP's air releases rose from 438.5 thousand lb in 2022 to 518.4 thousand lb in 2023, based on EPA TRI filings.
- Marathon Petroleum Co LP's chemicals reported rose from 34 in 2022 to 38 in 2023, based on EPA TRI filings.
Marathon Petroleum Co LP Form-R facts
Compare this facility
See how Marathon Petroleum Co LP stacks up against nearby facilities and the typical reporter.
28.0× more than the comparison
11.3× 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 Petroleum Co LP releases toxic chemicals into the environment. Total: 3.6M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 11% (714.3K lbs to 795.6K lbs).
Marathon Petroleum Co LP: annual Form-R pounds
HEAVY site · MIXED pathway · TRI years 2019–2023
- 2019
- 2020
- 2021
- 2022
- 2023
What this shows Marathon Petroleum Co LP year-over-year reported totals (increased by 11% 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: Nitrate compounds (water dissociable; reportable only when in aqueous solution).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 714.3K lbs | 36 |
| 2020 | 643.5K lbs | 36 |
| 2021 | 748.2K lbs | 34 |
| 2022 | 723.4K lbs | 34 |
| 2023 | 795.6K lbs | 38 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 14 of 45 chemicals are carcinogens. Sorted by total release volume.
Marathon Petroleum Co LP in St. John The Baptist Parish
Nearest TRI Facilities to Marathon Petroleum Co LP
Closest other reporters in Louisiana - including Air Products & Chemicals Inc - Garyville Smr, Evonik Corp, Clariant Corporation - Reserve Site, ordered by distance.
Showing 8 of 416 other reporting facilities in Louisiana.
Similar Petroleum Facilities
Other Petroleum facilities with similar total release volumes (±80%), outside Louisiana - e.g. Deer Park Refining LP, Premcor Refining Group Inc Port Arthur, Phillips 66 Rodeo Renewable Energy Complex.
Compare beyond Louisiana
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Marathon Petroleum Co LP on cumulative reported pounds (3.6M lbs) and distinct chemical count (45). Release-pound peers include Structural Metals Inc, Westmoreland San Juan Mining LLC - San Juan Mine, Bunge N.a. (opd West) Inc.. Chemical-count peers include Ash Grove Cement Co, Ash Grove Cement, Chevron Products Co. Div of Chevron USA 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.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Ash Grove Cement Co Chanute, KS · Nonmetallic Mineral Product 45 chemicals
- Ash Grove Cement Foreman, AR · Nonmetallic Mineral Product 45 chemicals
- Chevron Products Co. Div of Chevron USA Inc. El Segundo, CA · Petroleum 45 chemicals
- Clean Harbors Buttonwillow LLC Buttonwillow, CA · Hazardous Waste 45 chemicals
Other Marathon Petroleum Corp Facilities
Same-parent TRI sites ranked by reported releases - including Blanchard Refining Co LLC, Marathon Mandan Refinery, 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 Nitrate compounds (water dissociable; reportable only when in aqueous solution), Hydrogen cyanide, Ammonia, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); nearby reporters include Air Products & Chemicals Inc - Garyville Smr. Marathon Petroleum Co LP stamps HEAVY 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 Marathon Petroleum Co LP TRI extract (HEAVY · MIXED · CARC-LEAN · lead Nitrate compounds (water dissociable; reportable only when in aqueous solution)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Marathon Petroleum Co LP totals are self-reported EPCRA §313 estimates for Garyville, LA, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 324110 · Petroleum. 35.8% of St. John The Baptist Parish TRI pounds in this extract. Nearest ABS peer: Structural Metals Inc (Δ 2.7K lbs). Pounds ≠ exposure.
Marathon Petroleum Co LP stamps HEAVY · MIXED pathway (air releases leads at 61.6%). 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