EPA TRI Facility · Primary Metals
Tamco
Rancho Cucamonga, CA · Parent: Commercial Metals Co
- Total releases
- 542.4K lbs
- Chemicals reported
- 10
- Carcinogens
- 4
- Primary pathway
- Off-site Transfers
OFFSITE Form-R mix
Tamco: how the 542.4K lbs splits
542.4K lbs across all reported pathways
- Off-site Transfers 542.0K lbs 99.9%
- Air Releases 403 lbs 0.1%
- Water Discharges 75 lbs <0.1%
Tamco's 542.4K lbs Form-R total is OFFSITE - off-site transfers is 99.9% of the bar. Next segment: air releases at 0.1%. 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.
MID volume OFFSITE pathway CARC-LEAN
Tamco is an EPA Toxics Release Inventory reporter in Rancho Cucamonga, CA, in the primary metals sector. It reported 51.1K lbs of releases across 3 chemicals in 2020, and 542.4K lbs in total across its 2019-2020 reporting years. That ranks 1,850 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. Tamco is pounds #48 and chemical-count #72 at 542.4K 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). Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Parallel Products of California; Schlosser Forge Co; Accella Polyurethane Systems LLC; Vista Metals Corp.. Similar-scale Primary Metals peers outside California: Rmi Titanium Co LLC; Gerdau-Fort Smith Mill; Metaltek International-Wisco Nsin Centrifugal Div; Ames Copper Group LLC. Other Commercial Metals Co sites in this extract: Structural Metals Inc; Cmc Rebar Arizona; Cmc Steel Sc; Cmc Steel Oklahoma LLC. Largest disclosed chemicals by pounds: Zinc compounds; Manganese And Manganese Compounds; Manganese; Lead compounds.
Compare Tamco with
Nearest reporters in California
- Parallel Products of California Rancho Cucamonga · 7.2K lbs
- Schlosser Forge Co Rancho Cucamonga · 15.9K lbs
- Accella Polyurethane Systems LLC Rancho Cucamonga · 84 lbs
- Vista Metals Corp. Fontana · 213.6K lbs
Similar-scale Primary Metals sites elsewhere: Rmi Titanium Co LLC (OH) · Gerdau-Fort Smith Mill (AR) · Metaltek International-Wisco Nsin Centrifugal Div (WI)
Tamco stamps MID volume with a dominant OFFSITE pathway (99.9% off-site transfers) across 10 chemicals · 4 carcinogen-classified. Cumulative Form-R extract: 542.4K lbs (2019–2020). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Rmi Titanium Co LLC and Gerdau-Fort Smith Mill.
Tamco vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
542K lbs Top 7% higher than 93% 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
Tamco: Zinc compounds-led volume
Among the 1,603 Primary Metals facilities in this database, Tamco reports the 204th-largest volume, placing it in the top 12.7% of its sector. Its reported volume is concentrated rather than spread: Zinc compounds alone is 77.2% of the total. Scale peers outside California include Rmi Titanium Co LLC and Gerdau-Fort Smith Mill.
Concentrated means ≥60% of Tamco's pounds in one chemical - here Zinc compounds at 77.2%. Not a toxicity score.
Tamco Form-R facts
Compare this facility
See how Tamco stacks up against nearby facilities and the typical reporter.
74.9× more than the comparison
10.0× 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 Tamco releases toxic chemicals into the environment. Total: 542.4K lbs.
Emissions Trend Summary
From 2019 to 2020, total releases decreased by 90% (491.4K lbs to 51.1K lbs).
Tamco: annual Form-R pounds
MID site · OFFSITE pathway · TRI years 2019–2020
- 2019 0
- 2020 0
What this shows Tamco year-over-year reported totals (decreased by 90% from 2019 to 2020). 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 | 491.4K lbs | 7 |
| 2020 | 51.1K lbs | 3 |
Chemical Releases
Aggregated across all reporting years (2019–2020). 4 of 10 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Zinc compounds | 418.7K lbs | - |
| Manganese And Manganese Compounds | 40.8K lbs | - |
| Manganese | 39.0K lbs | - |
| Lead compounds | 28.5K lbs | - |
| Lead | 10.9K lbs | Carcinogen |
| Nickel compounds | 2.5K lbs | Carcinogen |
| Nickel | 1.1K lbs | Carcinogen |
| Vanadium compounds | 747 lbs | - |
| Mercury compounds | 49 lbs | - |
| Dioxin and dioxin-like compounds | 0 lbs | Carcinogen |
Tamco · OFFSITE-pathway site
Nearest TRI Facilities to Tamco
Closest other reporters in California - including Parallel Products of California, Schlosser Forge Co, Accella Polyurethane Systems LLC, ordered by distance.
Showing 8 of 1,148 other reporting facilities in California.
Similar Primary Metals Facilities
Other Primary Metals facilities with similar total release volumes (±80%), outside California - e.g. Rmi Titanium Co LLC, Gerdau-Fort Smith Mill, Metaltek International-Wisco Nsin Centrifugal Div.
Compare beyond California
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Tamco on cumulative reported pounds (542.4K lbs) and distinct chemical count (10). Release-pound peers include Dominion Energy South Carolina - Jasper Generating Station, Rmi Titanium Co LLC, Tessenderlo Kerley Inc.. Chemical-count peers include Harris Paints Corp., Saint Thomas Bulk Terminal, Total Guaynabo Bulk Terminal. 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.
- Dominion Energy South Carolina - Jasper Generating Station Hardeeville, SC · Electric Utilities 542.9K lbs reported
- Rmi Titanium Co LLC Niles, OH · Primary Metals 541.9K lbs reported
- Tessenderlo Kerley Inc. Coffeyville, KS · Chemicals 541.9K lbs reported
- Oxbow Calcining LLC Kremlin, OK · Petroleum 543.5K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Commercial Metals Co Facilities
Same-parent TRI sites ranked by reported releases - including Structural Metals Inc, Cmc Rebar Arizona, Cmc Steel Sc.
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, Manganese, Lead compounds; nearby reporters include Parallel Products of California. Tamco stamps MID volume · OFFSITE 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 Tamco TRI extract (MID · OFFSITE · CARC-LEAN · lead Zinc compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Tamco totals are self-reported EPCRA §313 estimates for Rancho Cucamonga, CA, latest year 2020. Form-R rows span 2019–2020 (2 years). NAICS 331110 · Primary Metals. 7.8% of San Bernardino TRI pounds in this extract. Nearest ABS peer: New-Indy Containerboard Ontario LLC (Δ 4 lbs). Pounds ≠ exposure.
Tamco stamps MID volume · OFFSITE pathway · CARC-LEAN · 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