EPA TRI Facility · Plastics and Rubber
Mastermold LLC
Johnson Creek, WI
- Total releases
- 80.9K lbs
- Chemicals reported
- 2
- Carcinogens
- 1
- Primary pathway
- Air Releases
AIR Form-R mix
Mastermold LLC: how the 80.9K lbs splits
80.9K lbs across all reported pathways
- Air Releases 80.9K lbs 100.0%
Mastermold LLC's 80.9K lbs Form-R total is AIR - air releases is 100.0% of the bar. Off-site transfers stay separate from air, water, and land releases. Leading chemical by pounds: Styrene.
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.
LIGHT volume AIR pathway CARC-HEAVY
Mastermold LLC is an EPA Toxics Release Inventory reporter in Johnson Creek, WI, in the plastics and rubber sector. It reported 29.2K lbs of releases across 2 chemicals in 2023, and 80.9K lbs in total across its 2019-2023 reporting years. That ranks 5,039 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Wisconsin's 836 reporting TRI sites, pounds #1 is not chemical-count #1. Mastermold LLC is pounds #189 and chemical-count #484 at 80.9K lbs. Mullins Cheese Inc leads reported pounds (11.2M lbs) at 3 chemicals (chemical-count #319). Ppg Industries Inc-Oak Creek leads chemical count at 32 chemicals (2.2M lbs, pounds #16). Reported volume rose against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Milkrite Interpuls Inc; Aztalan Bio; Valero Renewable Fuels; Nestle Purina Petcare. Similar-scale Plastics and Rubber peers outside Wisconsin: Mfg Alabama LLC; American Whirlpool; Zehrco Giancola Acquisition Four; Ashley Industrial Molding. Largest disclosed chemicals by pounds: Styrene; n-Butyl alcohol.
Mastermold LLC stamps LIGHT volume with a dominant AIR pathway (100.0% air releases) across 2 chemicals · 1 carcinogen-classified. Cumulative Form-R extract: 80.9K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Mfg Alabama LLC and American Whirlpool.
Mastermold LLC vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
81K lbs Top 19% higher than 81% 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
Mastermold LLC: Styrene-led volume
Among the 1,504 Plastics and Rubber facilities in this database, Mastermold LLC reports the 370th-largest volume, placing it in the top 24.6% of its sector. Its reported volume is concentrated rather than spread: Styrene alone is 83.4% of the total. Carcinogen-classified chemicals make up 83.4% of the reported pounds, not just of the chemical count. Scale peers outside Wisconsin include Mfg Alabama LLC and American Whirlpool.
Concentrated means ≥60% of Mastermold LLC's pounds in one chemical - here Styrene at 83.4%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Mastermold LLC's total reported releases rose from 18.8 thousand lb in 2022 to 29.2 thousand lb in 2023, based on EPA TRI filings.
- Mastermold LLC's chemicals reported rose from 1 in 2022 to 2 in 2023, based on EPA TRI filings.
- Mastermold LLC's air releases rose from 18.8 thousand lb in 2022 to 29.2 thousand lb in 2023, based on EPA TRI filings.
Mastermold LLC Form-R facts
Compare this facility
See how Mastermold LLC stacks up against nearby facilities and the typical reporter.
3.6× more than the comparison
About the same as 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 Mastermold LLC releases toxic chemicals into the environment. Total: 80.9K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 199% (9.8K lbs to 29.2K lbs).
Mastermold LLC: annual Form-R pounds
LIGHT site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Mastermold LLC year-over-year reported totals (increased by 199% 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: Styrene.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 9.8K lbs | 1 |
| 2020 | 9.5K lbs | 1 |
| 2021 | 13.6K lbs | 1 |
| 2022 | 18.8K lbs | 1 |
| 2023 | 29.2K lbs | 2 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 1 of 2 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Styrene | 67.5K lbs | Carcinogen |
| n-Butyl alcohol | 13.4K lbs | - |
Mastermold LLC · AIR-pathway site
Nearest TRI Facilities to Mastermold LLC
Closest other reporters in Wisconsin - including Milkrite Interpuls Inc, Aztalan Bio, Valero Renewable Fuels, ordered by distance.
Showing 8 of 835 other reporting facilities in Wisconsin.
Similar Plastics and Rubber Facilities
Other Plastics and Rubber facilities with similar total release volumes (±80%), outside Wisconsin - e.g. Mfg Alabama LLC, American Whirlpool, Zehrco Giancola Acquisition Four.
Compare beyond Wisconsin
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Mastermold LLC on cumulative reported pounds (80.9K lbs) and distinct chemical count (2). Release-pound peers include Precoat Metals, Intel Corp-Aloha Campus, Mfg Alabama LLC. Chemical-count peers include Idi Caribe Inc, Suiza Dairy Corp, Edwards Lifesciences Technology Sarl. 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.
- Precoat Metals Greenfield, IN · Fabricated Metals 80.9K lbs reported
- Intel Corp-Aloha Campus Aloha, OR · Computers and Electronic Products 80.9K lbs reported
- Mfg Alabama LLC Opp, AL · Plastics and Rubber 81.0K lbs reported
- Columbus Brick Co Columbus, MS · Nonmetallic Mineral Product 81.0K lbs reported
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 Styrene, n-Butyl alcohol; nearby reporters include Milkrite Interpuls Inc. Mastermold LLC stamps LIGHT volume · AIR pathway · CARC-HEAVY 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 Mastermold LLC TRI extract (LIGHT · AIR · CARC-HEAVY · lead Styrene) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Mastermold LLC totals are self-reported EPCRA §313 estimates for Johnson Creek, WI, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 326199 · Plastics and Rubber. 2.9% of Jefferson TRI pounds in this extract. Nearest ABS peer: Precoat Metals (Δ 4 lbs). Pounds ≠ exposure.
Mastermold LLC stamps LIGHT volume · AIR pathway · CARC-HEAVY · lead Styrene. 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