EPA TRI Facility · Primary Metals
Semco Enterprises Inc
City Of Industry, CA
- Total releases
- 1.7K lbs
- Chemicals reported
- 3
- Carcinogens
- 1
- Primary pathway
- Water Discharges
WATER Form-R mix
Semco Enterprises Inc: how the 1.7K lbs splits
1.7K lbs across all reported pathways
- Water Discharges 1.5K lbs 91.4%
- Air Releases 144 lbs 8.6%
- Land Disposal 0 lbs <0.1%
Semco Enterprises Inc's 1.7K lbs Form-R total is WATER - water discharges is 91.4% of the bar. Next segment: air releases at 8.6%. Leading chemical by pounds: Zinc compounds.
LIGHT volume WATER pathway TRACE-CARC
Semco Enterprises Inc is an EPA Toxics Release Inventory reporter in City Of Industry, CA, in the primary metals sector. It reported 166 lbs of releases across 3 chemicals in 2023, and 1.7K lbs in total across its 2019-2023 reporting years. That ranks 13,093 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. Semco Enterprises Inc is pounds #614 and chemical-count #459 at 1.7K 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: Hexpol City of Industry; Allfast Fastening Systems LLC; Howmet Global Fastening Systems Inc.; Ninth Ave Foods. Similar-scale Primary Metals peers outside California: State Metal Industries Inc; Travis Pattern & Foundry Inc; Webco Industries Inc. - Reno Div; Vmc Specialty Alloys LLC. Largest disclosed chemicals by pounds: Zinc compounds; Copper; Lead.
Semco Enterprises Inc stamps LIGHT volume with a dominant WATER pathway (91.4% water discharges) across 3 chemicals · 1 carcinogen-classified. Cumulative Form-R extract: 1.7K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include State Metal Industries Inc and Travis Pattern & Foundry Inc.
Semco Enterprises Inc vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
1.7K lbs Top 50% higher than 50% 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
Semco Enterprises Inc: Zinc compounds-led volume
Among the 1,603 Primary Metals facilities in this database, Semco Enterprises Inc reports the 973rd-largest volume (1.7K lbs). Its reported volume is concentrated rather than spread: Zinc compounds alone is 93.0% of the total. Scale peers outside California include State Metal Industries Inc and Travis Pattern & Foundry Inc.
Concentrated means ≥60% of Semco Enterprises Inc's pounds in one chemical - here Zinc compounds at 93.0%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Semco Enterprises Inc's total reported releases fell from 198 lb in 2022 to 166 lb in 2023, based on EPA TRI filings.
- Semco Enterprises Inc's water releases fell from 166 lb in 2022 to 142 lb in 2023, based on EPA TRI filings.
Semco Enterprises Inc Form-R facts
Compare this facility
See how Semco Enterprises Inc stacks up against nearby facilities and the typical reporter.
51% less than the comparison
50% 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 Semco Enterprises Inc releases toxic chemicals into the environment. Total: 1.7K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 68% (525 lbs to 166 lbs).
Semco Enterprises Inc: annual Form-R pounds
LIGHT site · WATER pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Semco Enterprises Inc year-over-year reported totals (decreased by 68% 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: Zinc compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 525 lbs | 3 |
| 2020 | 276 lbs | 3 |
| 2021 | 503 lbs | 3 |
| 2022 | 198 lbs | 3 |
| 2023 | 166 lbs | 3 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 1 of 3 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Zinc compounds | 1.6K lbs | - |
| Copper | 117 lbs | - |
| Lead | 0 lbs | Carcinogen |
Semco Enterprises Inc · WATER-pathway site
Nearest TRI Facilities to Semco Enterprises Inc
Closest other reporters in California - including Hexpol City of Industry, Allfast Fastening Systems LLC, Howmet Global Fastening Systems Inc., 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. State Metal Industries Inc, Travis Pattern & Foundry Inc, Webco Industries Inc. - Reno Div.
Compare beyond California
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Semco Enterprises Inc on cumulative reported pounds (1.7K lbs) and distinct chemical count (3). Release-pound peers include Championx - Aztec, The D S Brown Co, Pre Con Inc. Chemical-count peers include Industrial C&s of Pr LLC Arecibo Plant, Island Litho Corp., Fenwal International 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).
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, Copper, Lead; nearby reporters include Hexpol City of Industry. Semco Enterprises Inc stamps LIGHT volume · WATER 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 Semco Enterprises Inc TRI extract (LIGHT · WATER · TRACE-CARC · lead Zinc compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Semco Enterprises Inc totals are self-reported EPCRA §313 estimates for City Of Industry, CA, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 331492 · Primary Metals. 0.0% of Los Angeles TRI pounds in this extract. Nearest ABS peer: Championx - Aztec (Δ 1 lbs). Pounds ≠ exposure.
Semco Enterprises Inc stamps LIGHT volume · WATER 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