EPA TRI Facility · Chemicals
Monument Chemical Port Arthur LLC
Port Arthur, TX · Parent: Monument Chemical LLC
- Total releases
- 2.9M lbs
- Chemicals reported
- 25
- Carcinogens
- 10
- Primary pathway
- Off-site Transfers
Reported-total composition
How the reported total is distributed
2.9M lbs across all reported pathways
- Off-site Transfers 2.8M lbs 97.6%
- Air Releases 68.1K lbs 2.4%
- Land Disposal 0 lbs <0.1%
The segments reconcile to the cumulative total shown above. Off-site transfers are shown separately from releases to air, water, and land.
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.
HEAVY volume OFFSITE pathway CARC-LEAN
Monument Chemical Port Arthur LLC is an EPA Toxics Release Inventory reporter in Port Arthur, TX, in the chemicals sector. It reported 6.4K lbs of releases across 23 chemicals in 2023, and 2.9M lbs in total across its 2019-2023 reporting years. That ranks 665 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Texas's 2,016 reporting TRI sites, pounds #1 is not chemical-count #1. Monument Chemical Port Arthur LLC is pounds #70 and chemical-count #70 at 2.9M lbs. Ascend Performance Materials-Chocolate Bayou Plant leads reported pounds (94.0M lbs) at 36 chemicals (chemical-count #35). Veolia Es Technical Solutions LLC Port Arthur Facility leads chemical count at 246 chemicals (1.5M lbs, pounds #112). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Oxbow Calcining LLC; Motiva-Port Arthur Terminal; Chevron Port Arthur Lubricants Plant; Derrick Oil & Supply Co Inc. Similar-scale Chemicals peers outside Texas: Chemtall Incorporated; Flocryl LLC; Sasol Chemicals (usa) Llc-Lake Charles Chemical Complex; Galata Chemicals LLC - Galata Taft Facility; Taminco US LLC. Other Monument Chemical LLC sites in this extract: Monument Chemical Houston LLC; Monument Chemical Bayport LLC; Monument Chemical Baytown LLC. Largest disclosed chemicals by pounds: Methanol; Ethylene glycol; Benzene; Toluene.
Monument Chemical Port Arthur LLC has reported 2.9M lbs of toxic releases across 25 chemicals to the EPA Toxic Release Inventory, based on annual facility disclosures from 2019 through 2023. Of the chemicals reported, 10 are classified as carcinogens, representing 40% of the facility's chemical profile. The facility operates in the Chemicals sector. The primary release pathway is off-site transfers, accounting for 98% of total releases. All release data shown below is self-reported to the EPA under the Emergency Planning and Community Right-to-Know Act (EPCRA) Section 313.
Monument Chemical Port Arthur LLC vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
2.9M lbs Top 3% higher than 97% 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
Where this facility sits in the TRI record
Among the 3,917 Chemicals facilities in this database, Monument Chemical Port Arthur LLC reports the 126th-largest volume, placing it in the top 3.2% of its sector. Its reported volume is concentrated rather than spread: Methanol alone is 92.9% of the total.
Placement is computed from reported TRI pounds in this database. Thresholds are fixed across every facility page: concentrated ≥60% of volume in one chemical, county-dominant ≥25% of the county total, carcinogen-heavy ≥50% of pounds. Share-based statements are shown only for sites reporting at least 1,000 lbs, because a share of a very small total is not a meaningful signal. Reported pounds are self-reported estimates and do not measure toxicity or health risk.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Monument Chemical Port Arthur LLC's total reported releases fell from 10.2 thousand lb in 2022 to 6.4 thousand lb in 2023, based on EPA TRI filings.
- Monument Chemical Port Arthur LLC's off-site transfers fell from 231 lb in 2022 to 0 lb in 2023, based on EPA TRI filings.
- Monument Chemical Port Arthur LLC's air releases fell from 10.0 thousand lb in 2022 to 6.4 thousand lb in 2023, based on EPA TRI filings.
Quick Facts
Compare this facility
See how Monument Chemical Port Arthur LLC stacks up against nearby facilities and the typical reporter.
10.3× more than the comparison
3.1× 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 Monument Chemical Port Arthur LLC releases toxic chemicals into the environment. Total: 2.9M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 100% (2.2M lbs to 6.4K lbs).
Reported total releases by year
Monument Chemical Port Arthur LLC - annual TRI totals
- 2019
- 2020
- 2021 0
- 2022 0
- 2023 0
What this shows Year-over-year reported totals. TRI figures are self-reported estimates and can swing with production levels, waste-rock handling and reporting changes, not only with emissions controls.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 2.2M lbs | 13 |
| 2020 | 588.9K lbs | 20 |
| 2021 | 14.8K lbs | 25 |
| 2022 | 10.2K lbs | 23 |
| 2023 | 6.4K lbs | 23 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 10 of 25 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Methanol | 2.7M lbs | - |
| Ethylene glycol | 136.1K lbs | - |
| Benzene | 18.8K lbs | Carcinogen |
| Toluene | 10.4K lbs | - |
| Xylene (mixed isomers) | 4.8K lbs | - |
| n-Hexane | 4.7K lbs | - |
| Styrene | 4.4K lbs | Carcinogen |
| Naphthalene | 3.9K lbs | Carcinogen |
| Vinyl acetate | 3.8K lbs | Carcinogen |
| 1,2,4-Trimethylbenzene | 3.2K lbs | - |
| Ethylbenzene | 2.6K lbs | Carcinogen |
| n-Butyl alcohol | 2.2K lbs | - |
| 1,3-Butadiene | 2.0K lbs | Carcinogen |
| Dicyclopentadiene | 1.8K lbs | - |
| Isoprene | 1.3K lbs | Carcinogen |
| Methyl tert-butyl ether | 1.3K lbs | - |
| Cumene | 780 lbs | Carcinogen |
| Acrylonitrile | 90 lbs | Carcinogen |
| Phenol | 45 lbs | - |
| Polycyclic aromatic compounds | 19 lbs | Carcinogen |
| Cyclohexane | 17 lbs | - |
| Acetophenone | 0 lbs | - |
| Certain glycol ethers | 0 lbs | - |
| o-Cresol | 0 lbs | - |
| tert-Butyl alcohol | 0 lbs | - |
Location
Nearest TRI Facilities to Monument Chemical Port Arthur LLC
Closest other reporters in Texas - including Oxbow Calcining LLC, Motiva-Port Arthur Terminal, Chevron Port Arthur Lubricants Plant, ordered by distance.
Showing 8 of 2,015 other reporting facilities in Texas.
Similar Chemicals Facilities
Other Chemicals facilities with similar total release volumes (±80%), outside Texas - e.g. Chemtall Incorporated; Flocryl LLC, Sasol Chemicals (usa) Llc-Lake Charles Chemical Complex, Galata Chemicals LLC - Galata Taft Facility.
Compare beyond Texas
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Monument Chemical Port Arthur LLC on cumulative reported pounds (2.9M lbs) and distinct chemical count (25). Release-pound peers include Chemtall Incorporated; Flocryl LLC, US Navy Nswc Crane Div Installation Activity-Installation, US Army Fort Campbell. Chemical-count peers include Aes Puerto Rico LP, Verso Luke LLC, Virginia City Hybrid Energy Center. 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.
- Chemtall Incorporated; Flocryl LLC Riceboro, GA · Chemicals 2.9M lbs reported
- US Navy Nswc Crane Div Installation Activity-Installation Crane, IN · Other 2.9M lbs reported
- US Army Fort Campbell Fort Campbell, KY · Other 2.9M lbs reported
- Sasol Chemicals (usa) Llc-Lake Charles Chemical Complex Westlake, LA · Chemicals 2.9M lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Monument Chemical LLC Facilities
Same-parent TRI sites ranked by reported releases - including Monument Chemical Houston LLC, Monument Chemical Bayport LLC, Monument Chemical Baytown 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 Methanol, Ethylene glycol, Benzene, Toluene; nearby reporters include Oxbow Calcining LLC. Monument Chemical Port Arthur LLC stamps HEAVY 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 Monument Chemical Port Arthur LLC record combines EPA TRI filings, facility identity, and compliance context without turning reported releases into a health-risk rating.
TRI release totals are self-reported estimates, not measured stack emissions. The methodology explains how records are joined, computed, and refreshed.
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.
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