EPA TRI Facility · Petroleum
Tesoro Los Angeles Refinery-Carson Operations
Carson, CA · Parent: Tesoro Corp
- Total releases
- 4.8M lbs
- Chemicals reported
- 44
- Carcinogens
- 13
- Primary pathway
- Air Releases
AIR Form-R mix
Tesoro Los Angeles Refinery-Carson Operations: how the 4.8M lbs splits
4.8M lbs across all reported pathways
- Air Releases 4.3M lbs 90.3%
- Off-site Transfers 463.1K lbs 9.6%
- Water Discharges 1.4K lbs <0.1%
- Land Disposal 26 lbs <0.1%
Tesoro Los Angeles Refinery-Carson Operations's 4.8M lbs Form-R total is AIR - air releases is 90.3% of the bar. Next segment: off-site transfers at 9.6%. Leading chemical by pounds: Ammonia.
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
Tesoro Los Angeles Refinery-Carson Operations is an EPA Toxics Release Inventory reporter in Carson, CA, in the petroleum sector. It reported 955.8K lbs of releases across 38 chemicals in 2023, and 4.8M lbs in total across its 2019-2023 reporting years. That ranks 446 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In California's 1,149 reporting TRI sites, pounds #1 is not chemical-count #1. Tesoro Los Angeles Refinery-Carson Operations is pounds #6 and chemical-count #5 at 4.8M lbs. Clean Harbors Buttonwillow LLC leads reported pounds (50.4M lbs) at 45 chemicals (chemical-count #2). Chevron Products Co Richmond Refinery leads chemical count at 46 chemicals (3.0M lbs, pounds #13). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Phillips 66 Los Angeles Refinery Carson Plant; Valero Wilmington Asphalt Plant; Huck International Inc; Pennzoil-Quaker State Co (dba Sopus Products Lalp). Similar-scale Petroleum peers outside California: Flint Hills Resources Corpus Christi LLC - West Plant; Valero Refining-Texas LP Corpus Christi West Plant; Phillips 66 Co Sweeny Refinery Complex; Diamond Shamrock Refining Co LP. Other Tesoro Corp sites in this extract: Tesoro Refining & Marketing Company LLC - Slc. Largest disclosed chemicals by pounds: Ammonia; Methanol; Zinc compounds; Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
Tesoro Los Angeles Refinery-Carson Operations stamps HEAVY volume with a dominant AIR pathway (90.3% air releases) across 44 chemicals · 13 carcinogen-classified. Cumulative Form-R extract: 4.8M lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Flint Hills Resources Corpus Christi LLC - West Plant and Valero Refining-Texas LP Corpus Christi West Plant.
Tesoro Los Angeles Refinery-Carson Operations vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
4.8M 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
Tesoro Los Angeles Refinery-Carson Operations: Ammonia-led volume
Among the 902 Petroleum facilities in this database, Tesoro Los Angeles Refinery-Carson Operations reports the 22nd-largest volume, placing it in the top 2.4% of its sector. Its reported volume is concentrated rather than spread: Ammonia alone is 72.8% of the total. Scale peers outside California include Flint Hills Resources Corpus Christi LLC - West Plant and Valero Refining-Texas LP Corpus Christi West Plant.
Concentrated means ≥60% of Tesoro Los Angeles Refinery-Carson Operations's pounds in one chemical - here Ammonia at 72.8%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Tesoro Los Angeles Refinery-Carson Operations's total reported releases fell from 1.2 million lb in 2022 to 955.8 thousand lb in 2023, based on EPA TRI filings.
- Tesoro Los Angeles Refinery-Carson Operations's water releases rose from 179 lb in 2022 to 602 lb in 2023, based on EPA TRI filings.
- Tesoro Los Angeles Refinery-Carson Operations's off-site transfers rose from 96.4 thousand lb in 2022 to 122.5 thousand lb in 2023, based on EPA TRI filings.
- Tesoro Los Angeles Refinery-Carson Operations's air releases fell from 1.1 million lb in 2022 to 832.7 thousand lb in 2023, based on EPA TRI filings.
Tesoro Los Angeles Refinery-Carson Operations Form-R facts
Compare this facility
See how Tesoro Los Angeles Refinery-Carson Operations stacks up against nearby facilities and the typical reporter.
10.0× more than the comparison
69% 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 Tesoro Los Angeles Refinery-Carson Operations releases toxic chemicals into the environment. Total: 4.8M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 19% (1.2M lbs to 955.8K lbs).
Tesoro Los Angeles Refinery-Carson Operations: annual Form-R pounds
HEAVY site · AIR pathway · TRI years 2019–2023
- 2019
- 2020
- 2021 0
- 2022
- 2023
What this shows Tesoro Los Angeles Refinery-Carson Operations year-over-year reported totals (decreased by 19% 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: Ammonia.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 1.2M lbs | 39 |
| 2020 | 1.2M lbs | 39 |
| 2021 | 230.8K lbs | 39 |
| 2022 | 1.2M lbs | 41 |
| 2023 | 955.8K lbs | 38 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 13 of 44 chemicals are carcinogens. Sorted by total release volume.
Tesoro Los Angeles Refinery-Carson Operations · AIR-pathway site
Nearest TRI Facilities to Tesoro Los Angeles Refinery-Carson Operations
Closest other reporters in California - including Phillips 66 Los Angeles Refinery Carson Plant, Valero Wilmington Asphalt Plant, Huck International Inc, ordered by distance.
Showing 8 of 1,148 other reporting facilities in California.
Similar Petroleum Facilities
Other Petroleum facilities with similar total release volumes (±80%), outside California - e.g. Flint Hills Resources Corpus Christi LLC - West Plant, Valero Refining-Texas LP Corpus Christi West Plant, Phillips 66 Co Sweeny Refinery Complex.
Compare beyond California
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Tesoro Los Angeles Refinery-Carson Operations on cumulative reported pounds (4.8M lbs) and distinct chemical count (44). Release-pound peers include Barry Steam Plant, Chevron Phillips Chemical Co LP, Tyson Poultry Inc. - Processing Plant. Chemical-count peers include Valero Refining Co - Tennessee L.L.C., Basf Corp, Diamond Shamrock Refining Co LP. 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).
Other Tesoro Corp Facilities
Same-parent TRI sites ranked by reported releases - including Tesoro Refining & Marketing Company LLC - Slc.
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 Ammonia, Methanol, Zinc compounds, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); nearby reporters include Phillips 66 Los Angeles Refinery Carson Plant. Tesoro Los Angeles Refinery-Carson Operations 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 Tesoro Los Angeles Refinery-Carson Operations TRI extract (HEAVY · AIR · CARC-LEAN · lead Ammonia) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Tesoro Los Angeles Refinery-Carson Operations totals are self-reported EPCRA §313 estimates for Carson, CA, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 324110 · Petroleum. 11.0% of Los Angeles TRI pounds in this extract. Nearest ABS peer: Barry Steam Plant (Δ 2.9K lbs). Pounds ≠ exposure.
Tesoro Los Angeles Refinery-Carson Operations stamps HEAVY volume · AIR pathway · CARC-LEAN · lead Ammonia. 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