EPA TRI Facility · Chemicals
St Charles Operations (taft/star) Union Carbide Corp
Hahnville, LA · Parent: Dow Inc
- Total releases
- 3.2M lbs
- Chemicals reported
- 55
- Carcinogens
- 20
- Primary pathway
- Air Releases
MIXED Form-R mix
St Charles Operations (taft/star) Union Carbide Corp: how the 3.2M lbs splits
3.2M lbs across all reported pathways
- Air Releases 1.6M lbs 51.3%
- Water Discharges 1.1M lbs 36.4%
- Off-site Transfers 388.2K lbs 12.3%
St Charles Operations (taft/star) Union Carbide Corp's 3.2M lbs Form-R total is MIXED - air releases is 51.3% of the bar. Next segment: water discharges at 36.4%. Leading chemical by pounds: Nitrate compounds (water dissociable; reportable only when in aqueous solution).
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 MIXED pathway CARC-LEAN
St Charles Operations (taft/star) Union Carbide Corp is an EPA Toxics Release Inventory reporter in Hahnville, LA, in the chemicals sector. It reported 415.1K lbs of releases across 48 chemicals in 2023, and 3.2M lbs in total across its 2019-2023 reporting years. That ranks 614 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Louisiana's 417 reporting TRI sites, pounds #1 is not chemical-count #1. St Charles Operations (taft/star) Union Carbide Corp is pounds #39 and chemical-count #6 at 3.2M lbs. Bayer Cropscience LP leads reported pounds (81.9M lbs) at 17 chemicals (chemical-count #52). Eco-Services Operations leads chemical count at 68 chemicals (163.5K lbs, pounds #136). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Arkema Coating Resins; Galata Chemicals LLC - Galata Taft Facility; Koch Fertilizer LLC - Taft Terminal; Occidental Chemical Corp. Similar-scale Chemicals peers outside Louisiana: Ashland Specialty Ingredients (parlin Plant); Pmc Biogenix Inc; Lyondell Chemical Co Bayport Facility; Fujifilm Manufacturing USA Inc.. Other Dow Inc sites in this extract: The Dow Chemical Co - Louisiana Operations; The Dow Chemical Co - Beaumont Aniline; Dow Sabine River Operations; Dow Silicones Corp. Largest disclosed chemicals by pounds: Nitrate compounds (water dissociable; reportable only when in aqueous solution); Ethylene; Ammonia; Propylene.
St Charles Operations (taft/star) Union Carbide Corp is a HEAVY · MIXED-pathway Form-R site in Hahnville, LA: 3.2M lbs across 55 chemicals (20 carcinogen-classified, CARC-LEAN). No single media clears 70% of the bar (lead segment air releases at 51.3%). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Ashland Specialty Ingredients (parlin Plant) and Pmc Biogenix Inc.
St Charles Operations (taft/star) Union Carbide Corp vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
3.2M lbs Top 2% higher than 98% 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
St Charles Operations (taft/star) Union Carbide Corp in the Chemicals sector extract
Among the 3,917 Chemicals facilities in this database, St Charles Operations (taft/star) Union Carbide Corp reports the 116th-largest volume, placing it in the top 3% of its sector. Scale peers outside Louisiana include Ashland Specialty Ingredients (parlin Plant) and Pmc Biogenix Inc.
Sector rank uses reported TRI pounds only. Share callouts need ≥1,000 lbs so tiny totals cannot mint a false signal.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- St Charles Operations (taft/star) Union Carbide Corp's total reported releases fell from 505.0 thousand lb in 2022 to 415.1 thousand lb in 2023, based on EPA TRI filings.
- St Charles Operations (taft/star) Union Carbide Corp's water releases fell from 168.8 thousand lb in 2022 to 98.2 thousand lb in 2023, based on EPA TRI filings.
- St Charles Operations (taft/star) Union Carbide Corp's off-site transfers fell from 82.4 thousand lb in 2022 to 54.1 thousand lb in 2023, based on EPA TRI filings.
- St Charles Operations (taft/star) Union Carbide Corp's chemicals reported fell from 51 in 2022 to 48 in 2023, based on EPA TRI filings.
St Charles Operations (taft/star) Union Carbide Corp Form-R facts
Compare this facility
See how St Charles Operations (taft/star) Union Carbide Corp stacks up against nearby facilities and the typical reporter.
236.2× more than the comparison
5.5× 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 St Charles Operations (taft/star) Union Carbide Corp releases toxic chemicals into the environment. Total: 3.2M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 47% (787.3K lbs to 415.1K lbs).
St Charles Operations (taft/star) Union Carbide Corp: annual Form-R pounds
HEAVY site · MIXED pathway · TRI years 2019–2023
- 2019
- 2020
- 2021
- 2022
- 2023 0
What this shows St Charles Operations (taft/star) Union Carbide Corp year-over-year reported totals (decreased by 47% 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: Nitrate compounds (water dissociable; reportable only when in aqueous solution).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 787.3K lbs | 49 |
| 2020 | 678.5K lbs | 45 |
| 2021 | 771.4K lbs | 50 |
| 2022 | 505.0K lbs | 51 |
| 2023 | 415.1K lbs | 48 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 20 of 55 chemicals are carcinogens. Sorted by total release volume.
St Charles Operations (taft/star) Union Carbide Corp in St. Charles Parish
Nearest TRI Facilities to St Charles Operations (taft/star) Union Carbide Corp
Closest other reporters in Louisiana - including Arkema Coating Resins, Galata Chemicals LLC - Galata Taft Facility, Koch Fertilizer LLC - Taft Terminal, ordered by distance.
Showing 8 of 416 other reporting facilities in Louisiana.
Similar Chemicals Facilities
Other Chemicals facilities with similar total release volumes (±80%), outside Louisiana - e.g. Ashland Specialty Ingredients (parlin Plant), Pmc Biogenix Inc, Lyondell Chemical Co Bayport Facility.
Compare beyond Louisiana
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest St Charles Operations (taft/star) Union Carbide Corp on cumulative reported pounds (3.2M lbs) and distinct chemical count (55). Release-pound peers include Ashland Specialty Ingredients (parlin Plant), Elemental Environmental Solutions LLC, Pmc Biogenix Inc. Chemical-count peers include Heidelberg Materials US Cement LLC, Basin Electric Antelope Valley Station, Cleveland-Cliffs Burns Harbor 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.
- Ashland Specialty Ingredients (parlin Plant) Parlin, NJ · Chemicals 3.2M lbs reported
- Elemental Environmental Solutions LLC Arkadelphia, AR · Hazardous Waste 3.2M lbs reported
- Pmc Biogenix Inc Memphis, TN · Chemicals 3.2M lbs reported
- Hawaiian Electric Co Inc Kahe Generating Station Kapolei, HI · Electric Utilities 3.2M lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Heidelberg Materials US Cement LLC Logansport, IN · Nonmetallic Mineral Product 55 chemicals
- Basin Electric Antelope Valley Station Beulah, ND · Electric Utilities 55 chemicals
- Cleveland-Cliffs Burns Harbor LLC Burns Harbor, IN · Primary Metals 54 chemicals
- Wayne Disposal Inc Belleville, MI · Hazardous Waste 56 chemicals
Other Dow Inc Facilities
Same-parent TRI sites ranked by reported releases - including The Dow Chemical Co - Louisiana Operations, The Dow Chemical Co - Beaumont Aniline, Dow Sabine River Operations.
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 Nitrate compounds (water dissociable; reportable only when in aqueous solution), Ethylene, Ammonia, Propylene; nearby reporters include Arkema Coating Resins. St Charles Operations (taft/star) Union Carbide Corp stamps HEAVY volume · MIXED 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 St Charles Operations (taft/star) Union Carbide Corp TRI extract (HEAVY · MIXED · CARC-LEAN · lead Nitrate compounds (water dissociable; reportable only when in aqueous solution)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
St Charles Operations (taft/star) Union Carbide Corp totals are self-reported EPCRA §313 estimates for Hahnville, LA, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 325199 · Chemicals. 3.1% of St. Charles Parish TRI pounds in this extract. Nearest ABS peer: Ashland Specialty Ingredients (parlin Plant) (Δ 1.6K lbs). Pounds ≠ exposure.
St Charles Operations (taft/star) Union Carbide Corp stamps HEAVY · MIXED pathway (air releases leads at 51.3%). Pipeline-rendered EPA Form-R only - no editor-typed pounds. 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