EPA TRI Facility · Primary Metals
Uss Mon Valley Works - Edgar Thomson Plant
Braddock, PA · Parent: US Steel Corp
- Total releases
- 21.4M lbs
- Chemicals reported
- 21
- Carcinogens
- 5
- Primary pathway
- Off-site Transfers
OFFSITE Form-R mix
Uss Mon Valley Works - Edgar Thomson Plant: how the 25.6M lbs splits
25.6M lbs across all reported pathways
- Off-site Transfers 24.9M lbs 97.2%
- Air Releases 615.0K lbs 2.4%
- Water Discharges 97.9K lbs 0.4%
- Land Disposal 0 lbs <0.1%
Uss Mon Valley Works - Edgar Thomson Plant's 25.6M lbs Form-R total is OFFSITE - off-site transfers is 97.2% of the bar. Next segment: air releases at 2.4%. Leading chemical by pounds: Zinc compounds.
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 OFFSITE pathway TRACE-CARC
Uss Mon Valley Works - Edgar Thomson Plant is an EPA Toxics Release Inventory reporter in Braddock, PA, in the primary metals sector. It reported 4.2M lbs of releases across 17 chemicals in 2024, and 21.4M lbs in total across its 2019-2024 reporting years. That ranks 94 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Pennsylvania's 1,010 reporting TRI sites, pounds #1 is not chemical-count #1. Uss Mon Valley Works - Edgar Thomson Plant is pounds #2 and chemical-count #13 at 21.4M lbs. Max Environmental -- Yukon Facility leads reported pounds (34.8M lbs) at 18 chemicals (chemical-count #24). Keystone Cement Co leads chemical count at 53 chemicals (155.4K lbs, pounds #149). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Harsco Metals - Bri; Tms International LLC; Epic Metals Corp; Holtec Manufacturing. Similar-scale Primary Metals peers outside Pennsylvania: Cleveland-Cliffs Steel Corp; Cerro Wire LLC; Cleveland-Cliffs Steel LLC; Climax Molybdenum Co. Other US Steel Corp sites in this extract: Uss Gary Works; Uss-Clairton Plant; U.S. Steel Granite City Works; US Steel Corp Great Lakes Works. Largest disclosed chemicals by pounds: Zinc compounds; Manganese And Manganese Compounds; Lead And Lead Compounds; Chromium compounds (except for chromite ore mined in the Transvaal Region).
Uss Mon Valley Works - Edgar Thomson Plant stamps HEAVY volume with a dominant OFFSITE pathway (97.2% off-site transfers) across 21 chemicals · 5 carcinogen-classified. Cumulative Form-R extract: 21.4M lbs (2019–2024). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Cleveland-Cliffs Steel Corp and Cerro Wire LLC.
Uss Mon Valley Works - Edgar Thomson Plant vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
21M lbs Top 1% higher than 100% 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
Uss Mon Valley Works - Edgar Thomson Plant inside Allegheny's TRI pounds
Among the 1,603 Primary Metals facilities in this database, Uss Mon Valley Works - Edgar Thomson Plant reports the 15th-largest volume, placing it in the top 0.9% of its sector. This one site accounts for 45.8% of every pound reported in Allegheny. Its reported volume is concentrated rather than spread: Zinc compounds alone is 67.4% of the total. Scale peers outside Pennsylvania include Cleveland-Cliffs Steel Corp and Cerro Wire LLC.
County-dominant here means ≥25% of Allegheny's reported pounds (46.8M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Uss Mon Valley Works - Edgar Thomson Plant's total reported releases rose from 3.3 million lb in 2022 to 3.6 million lb in 2023, based on EPA TRI filings.
- Uss Mon Valley Works - Edgar Thomson Plant's water releases fell from 18.3 thousand lb in 2022 to 10.2 thousand lb in 2023, based on EPA TRI filings.
- Uss Mon Valley Works - Edgar Thomson Plant's off-site transfers rose from 3.2 million lb in 2022 to 3.5 million lb in 2023, based on EPA TRI filings.
- Uss Mon Valley Works - Edgar Thomson Plant's air releases rose from 93.8 thousand lb in 2022 to 98.3 thousand lb in 2023, based on EPA TRI filings.
Uss Mon Valley Works - Edgar Thomson Plant Form-R facts
Compare this facility
See how Uss Mon Valley Works - Edgar Thomson Plant stacks up against nearby facilities and the typical reporter.
6434539.8× more than the comparison
7.0× 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 Uss Mon Valley Works - Edgar Thomson Plant releases toxic chemicals into the environment. Total: 25.6M lbs.
Emissions Trend Summary
From 2019 to 2024, total releases decreased by 25% (5.5M lbs to 4.2M lbs).
Uss Mon Valley Works - Edgar Thomson Plant: annual Form-R pounds
HEAVY site · OFFSITE pathway · TRI years 2019–2024
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
What this shows Uss Mon Valley Works - Edgar Thomson Plant year-over-year reported totals (decreased by 25% from 2019 to 2024). 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: Zinc compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 5.5M lbs | 17 |
| 2020 | 5.0M lbs | 19 |
| 2021 | 4.0M lbs | 18 |
| 2022 | 3.3M lbs | 17 |
| 2023 | 3.6M lbs | 17 |
| 2024 | 4.2M lbs | 17 |
Chemical Releases
Aggregated across all reporting years (2019–2024). 5 of 22 chemicals are carcinogens. Sorted by total release volume.
Uss Mon Valley Works - Edgar Thomson Plant · OFFSITE-pathway site
Nearest TRI Facilities to Uss Mon Valley Works - Edgar Thomson Plant
Closest other reporters in Pennsylvania - including Harsco Metals - Bri, Tms International LLC, Epic Metals Corp, ordered by distance.
Showing 8 of 1,009 other reporting facilities in Pennsylvania.
Similar Primary Metals Facilities
Other Primary Metals facilities with similar total release volumes (±80%), outside Pennsylvania - e.g. Cleveland-Cliffs Steel Corp, Cerro Wire LLC, Cleveland-Cliffs Steel LLC.
Compare beyond Pennsylvania
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Uss Mon Valley Works - Edgar Thomson Plant on cumulative reported pounds (21.4M lbs) and distinct chemical count (21). Release-pound peers include Xcel Energy Sherburne County Generating Plant, Cleveland-Cliffs Steel Corp, Smithfield Packaged Meats Corp - Sioux Falls. Chemical-count peers include Clean Earth of North Jersey Inc, International Paper Franklin Mill, Chemsolv 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.
- Xcel Energy Sherburne County Generating Plant Becker, MN · Electric Utilities 21.5M lbs reported
- Cleveland-Cliffs Steel Corp Coshocton, OH · Primary Metals 21.3M lbs reported
- Smithfield Packaged Meats Corp - Sioux Falls Sioux Falls, SD · Food 21.3M lbs reported
- Pcs Nitrogen Fertilizer LP Augusta, GA · Chemicals 21.7M lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other US Steel Corp Facilities
Same-parent TRI sites ranked by reported releases - including Uss Gary Works, Uss-Clairton Plant, U.S. Steel Granite City Works.
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 Zinc compounds, Manganese And Manganese Compounds, Lead And Lead Compounds, Chromium compounds (except for chromite ore mined in the Transvaal Region); nearby reporters include Harsco Metals - Bri. Uss Mon Valley Works - Edgar Thomson Plant stamps HEAVY volume · OFFSITE pathway · TRACE-CARC 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 Uss Mon Valley Works - Edgar Thomson Plant TRI extract (HEAVY · OFFSITE · TRACE-CARC · lead Zinc compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Uss Mon Valley Works - Edgar Thomson Plant totals are self-reported EPCRA §313 estimates for Braddock, PA, latest year 2023. Form-R rows span 2019–2024 (6 years). NAICS 331110 · Primary Metals. 45.8% of Allegheny TRI pounds in this extract. Nearest ABS peer: Xcel Energy Sherburne County Generating Plant (Δ 47.7K lbs). Pounds ≠ exposure.
Uss Mon Valley Works - Edgar Thomson Plant stamps HEAVY volume · OFFSITE pathway · TRACE-CARC · lead Zinc compounds. 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