EPA TRI Facility · Nonmetallic Mineral Product
Westlake Royal Stone LLC - Chester
Chester, SC · Parent: Westlake Corp
- Total releases
- 1.2K lbs
- Chemicals reported
- 4
- Latest report
- 2023
- Primary pathway
- Air Releases
AIR Form-R mix
Westlake Royal Stone LLC - Chester: how the 1.2K lbs splits
1.2K lbs across all reported pathways
- Air Releases 1.1K lbs 91.3%
- Off-site Transfers 106 lbs 8.7%
Westlake Royal Stone LLC - Chester's 1.2K lbs Form-R total is AIR - air releases is 91.3% of the bar. Next segment: off-site transfers at 8.7%. Leading chemical by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
LIGHT volume AIR pathway CLEAN
Westlake Royal Stone LLC - Chester is an EPA Toxics Release Inventory reporter in Chester, SC, in the nonmetallic mineral product sector. It reported 12 lbs of releases across 2 chemicals in 2023, and 1.2K lbs in total across its 2019-2023 reporting years. That ranks 13,582 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In South Carolina's 574 reporting TRI sites, pounds #1 is not chemical-count #1. Westlake Royal Stone LLC - Chester is pounds #365 and chemical-count #196 at 1.2K lbs. Oceanagold Haile Gold Mine leads reported pounds (30.2M lbs) at 19 chemicals (chemical-count #14). Giant Cement Co leads chemical count at 90 chemicals (53.3K lbs, pounds #185). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Coatex Inc; Engineered Polymer Solutions; Building Materials Manufacturing LLC; Boise Cascade Wood Products-Chester Plywood. Similar-scale Nonmetallic Mineral Product peers outside South Carolina: Corelle Brands LLC Pressware Plant; Glacier Northwest Inc Kenmore Ready-Mix Plant; Virginia Concrete Falls Church Plant; Calportland Oro Grande 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: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Lead And Lead Compounds; Lead compounds; Nitrate compounds (water dissociable; reportable only when in aqueous solution).
Westlake Royal Stone LLC - Chester stamps LIGHT volume with a dominant AIR pathway (91.3% air releases) across 4 chemicals. Cumulative Form-R extract: 1.2K lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Corelle Brands LLC Pressware Plant and Glacier Northwest Inc Kenmore Ready-Mix Plant.
Westlake Royal Stone LLC - Chester vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
1.2K lbs 48th percentile higher than 48% 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 - Chester: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)-led volume
Among the 3,265 Nonmetallic Mineral Product facilities in this database, Westlake Royal Stone LLC - Chester reports the 600th-largest volume, placing it in the top 18.4% of its sector. Its reported volume is concentrated rather than spread: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) alone is 91.3% of the total. Scale peers outside South Carolina include Corelle Brands LLC Pressware Plant and Glacier Northwest Inc Kenmore Ready-Mix Plant.
Concentrated means ≥60% of Westlake Royal Stone LLC - Chester's pounds in one chemical - here Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) at 91.3%. Not a toxicity score.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Westlake Royal Stone LLC - Chester's total reported releases fell from 546 lb in 2022 to 12 lb in 2023, based on EPA TRI filings.
- Westlake Royal Stone LLC - Chester's air releases fell from 524 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
Westlake Royal Stone LLC - Chester Form-R facts
Compare this facility
See how Westlake Royal Stone LLC - Chester stacks up against nearby facilities and the typical reporter.
81% less than the comparison
20% less 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 - Chester releases toxic chemicals into the environment. Total: 1.2K lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 98% (610 lbs to 12 lbs).
Westlake Royal Stone LLC - Chester: 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 Westlake Royal Stone LLC - Chester year-over-year reported totals (decreased by 98% 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: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 610 lbs | 2 |
| 2020 | 23 lbs | 2 |
| 2021 | 27 lbs | 2 |
| 2022 | 546 lbs | 2 |
| 2023 | 12 lbs | 2 |
Chemical Releases
Aggregated across all reporting years (2019–2023). Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1.1K lbs | - |
| Lead And Lead Compounds | 57 lbs | - |
| Lead compounds | 49 lbs | - |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 0 lbs | - |
Westlake Royal Stone LLC - Chester · AIR-pathway site
Nearest TRI Facilities to Westlake Royal Stone LLC - Chester
Closest other reporters in South Carolina - including Coatex Inc, Engineered Polymer Solutions, Building Materials Manufacturing LLC, ordered by distance.
Showing 8 of 573 other reporting facilities in South Carolina.
Similar Nonmetallic Mineral Product Facilities
Other Nonmetallic Mineral Product facilities with similar total release volumes (±80%), outside South Carolina - e.g. Corelle Brands LLC Pressware Plant, Glacier Northwest Inc Kenmore Ready-Mix Plant, Virginia Concrete Falls Church Plant.
Compare beyond South Carolina
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Westlake Royal Stone LLC - Chester on cumulative reported pounds (1.2K lbs) and distinct chemical count (4). Release-pound peers include Tivoly Inc., Custom Craft Poultry LLC, Hyrum Hot Plant. Chemical-count peers include Hamilton Sundstrand de Puerto Rico Inc., Abb Installation Products Caribe LLC, Solenis 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.
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Hamilton Sundstrand de Puerto Rico Inc. Santa Isabel, PR · Transportation Equipment 4 chemicals
- Abb Installation Products Caribe LLC Vega Baja, PR · Electrical Equipment 4 chemicals
- Solenis LLC Chicopee, MA · Chemicals 4 chemicals
- Adhesive Applications Inc. - O'Neill St Easthampton Easthampton, MA · Miscellaneous Manufacturing 4 chemicals
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 Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Lead And Lead Compounds, Lead compounds, Nitrate compounds (water dissociable; reportable only when in aqueous solution); nearby reporters include Coatex Inc. Westlake Royal Stone LLC - Chester stamps LIGHT volume · AIR 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 - Chester TRI extract (LIGHT · AIR · CLEAN · lead Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Westlake Royal Stone LLC - Chester totals are self-reported EPCRA §313 estimates for Chester, SC, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 327991 · Nonmetallic Mineral Product. 0.2% of Chester TRI pounds in this extract. Nearest ABS peer: Tivoly Inc. (Δ 0 lbs). Pounds ≠ exposure.
Westlake Royal Stone LLC - Chester stamps LIGHT volume · AIR pathway · CLEAN · lead Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size). 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