EPA TRI Facility · Nonmetallic Mineral Product
Westlake Royal Stone LLC - Napa
American Canyon, CA · Parent: Westlake Corp
- Total releases
- 2.6K lbs
- Chemicals reported
- 5
- Latest report
- 2023
- Primary pathway
- Off-site Transfers
OFFSITE Form-R mix
Westlake Royal Stone LLC - Napa: how the 2.6K lbs splits
2.6K lbs across all reported pathways
- Off-site Transfers 2.6K lbs 99.7%
- Air Releases 8 lbs 0.3%
Westlake Royal Stone LLC - Napa's 2.6K lbs Form-R total is OFFSITE - off-site transfers is 99.7% of the bar. Next segment: air releases at 0.3%. Leading chemical by pounds: Lead compounds.
LIGHT volume OFFSITE pathway CLEAN
Westlake Royal Stone LLC - Napa is an EPA Toxics Release Inventory reporter in American Canyon, CA, in the nonmetallic mineral product sector. It reported 679 lbs of releases across 3 chemicals in 2023, and 2.6K lbs in total across its 2019-2023 reporting years. That ranks 12,329 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. Westlake Royal Stone LLC - Napa is pounds #578 and chemical-count #238 at 2.6K 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: Foley Products Co - Napa; Vulcan Materials Co Napa Quarry; Producers Dairy Foods Inc; Vallejo Ready Mix. Similar-scale Nonmetallic Mineral Product peers outside California: Ardagh Glass Inc; Hyperion Materials & Technologies - Pompano; Plant 817 - Koenig - 7 Mile; American Gypsum Wallboard Plant. Other Westlake Corp sites in this extract: Westlake Longview Corp; Westlake US 2 LLC; Westlake Polymers LLC; Westlake Vinyls Inc. Largest disclosed chemicals by pounds: Lead compounds; Lead And Lead Compounds; Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Diisocyanates.
Westlake Royal Stone LLC - Napa stamps LIGHT volume with a dominant OFFSITE pathway (99.7% off-site transfers) across 5 chemicals. Cumulative Form-R extract: 2.6K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Ardagh Glass Inc and Hyperion Materials & Technologies - Pompano.
Westlake Royal Stone LLC - Napa vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
2.6K lbs Top 47% higher than 53% 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
Westlake Royal Stone LLC - Napa inside Napa's TRI pounds
Among the 3,265 Nonmetallic Mineral Product facilities in this database, Westlake Royal Stone LLC - Napa reports the 505th-largest volume, placing it in the top 15.5% of its sector. This one site accounts for more than 99.9% of every pound reported in Napa. Its reported volume is concentrated rather than spread: Lead compounds alone is 82.5% of the total. Scale peers outside California include Ardagh Glass Inc and Hyperion Materials & Technologies - Pompano.
County-dominant here means ≥25% of Napa's reported pounds (2.6K lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Westlake Royal Stone LLC - Napa's total reported releases fell from 712 lb in 2022 to 679 lb in 2023, based on EPA TRI filings.
- Westlake Royal Stone LLC - Napa's off-site transfers fell from 711 lb in 2022 to 679 lb in 2023, based on EPA TRI filings.
Westlake Royal Stone LLC - Napa Form-R facts
Compare this facility
See how Westlake Royal Stone LLC - Napa stacks up against nearby facilities and the typical reporter.
29651.0× more than the comparison
5.0× 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 Westlake Royal Stone LLC - Napa releases toxic chemicals into the environment. Total: 2.6K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases increased by 48% (460 lbs to 679 lbs).
Westlake Royal Stone LLC - Napa: annual Form-R pounds
LIGHT site · OFFSITE pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Westlake Royal Stone LLC - Napa year-over-year reported totals (increased by 48% 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: Lead compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 460 lbs | 3 |
| 2020 | 324 lbs | 3 |
| 2021 | 460 lbs | 3 |
| 2022 | 712 lbs | 3 |
| 2023 | 679 lbs | 3 |
Chemical Releases
Aggregated across all reporting years (2019–2023). Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Lead compounds | 2.2K lbs | - |
| Lead And Lead Compounds | 452 lbs | - |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 8 lbs | - |
| Diisocyanates | 0 lbs | - |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0 lbs | - |
Westlake Royal Stone LLC - Napa · OFFSITE-pathway site
Nearest TRI Facilities to Westlake Royal Stone LLC - Napa
Closest other reporters in California - including Foley Products Co - Napa, Vulcan Materials Co Napa Quarry, Producers Dairy Foods Inc, ordered by distance.
Showing 8 of 1,148 other reporting facilities in California.
Similar Nonmetallic Mineral Product Facilities
Other Nonmetallic Mineral Product facilities with similar total release volumes (±80%), outside California - e.g. Ardagh Glass Inc, Hyperion Materials & Technologies - Pompano, Plant 817 - Koenig - 7 Mile.
Compare beyond California
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Westlake Royal Stone LLC - Napa on cumulative reported pounds (2.6K lbs) and distinct chemical count (5). Release-pound peers include Thermal Spray Technologies Inc, Inliner Solutions LLC, Astemo Americas Inc-Hk. Chemical-count peers include Abbvie Ltd, Lilly del Caribe Inc Carolin A, Baxter Healthcare of Puerto Rico LLC. 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.
- Thermal Spray Technologies Inc Sun Prairie, WI · Fabricated Metals 2.6K lbs reported
- Inliner Solutions LLC Hugo, MN · Chemicals 2.6K lbs reported
- Astemo Americas Inc-Hk Harrodsburg, KY · Transportation Equipment 2.6K lbs reported
- Ppg Industries - Grand Haven Grand Haven, MI · Chemicals 2.6K lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Westlake Corp Facilities
Same-parent TRI sites ranked by reported releases - including Westlake Longview Corp, Westlake US 2 LLC, Westlake Polymers LLC.
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 Lead compounds, Lead And Lead Compounds, Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Diisocyanates; nearby reporters include Foley Products Co - Napa. Westlake Royal Stone LLC - Napa stamps LIGHT volume · OFFSITE pathway · CLEAN 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 Westlake Royal Stone LLC - Napa TRI extract (LIGHT · OFFSITE · CLEAN · lead Lead compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Westlake Royal Stone LLC - Napa totals are self-reported EPCRA §313 estimates for American Canyon, CA, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 327390 · Nonmetallic Mineral Product. more than 99.9% of Napa TRI pounds in this extract. Nearest ABS peer: Inliner Solutions LLC (Δ 1 lbs). Pounds ≠ exposure.
Westlake Royal Stone LLC - Napa stamps LIGHT volume · OFFSITE pathway · CLEAN · lead Lead 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