EPA TRI Facility · Electric Utilities
Ameren Missouri Sioux Energy Center
West Alton, MO · Parent: Ameren Corp
- Total releases
- 3.9M lbs
- Chemicals reported
- 21
- Carcinogens
- 3
- Primary pathway
- Land Disposal
LAND Form-R mix
Ameren Missouri Sioux Energy Center: how the 3.9M lbs splits
3.9M lbs across all reported pathways
- Land Disposal 3.3M lbs 83.1%
- Air Releases 653.4K lbs 16.6%
- Water Discharges 10.6K lbs 0.3%
- Off-site Transfers 21 lbs <0.1%
Ameren Missouri Sioux Energy Center's 3.9M lbs Form-R total is LAND - land disposal is 83.1% of the bar. Next segment: air releases at 16.6%. Leading chemical by pounds: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)).
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 LAND pathway TRACE-CARC
Ameren Missouri Sioux Energy Center is an EPA Toxics Release Inventory reporter in West Alton, MO, in the electric utilities sector. It reported 629.3K lbs of releases across 13 chemicals in 2023, and 3.9M lbs in total across its 2019-2023 reporting years. That ranks 518 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Missouri's 491 reporting TRI sites, pounds #1 is not chemical-count #1. Ameren Missouri Sioux Energy Center is pounds #15 and chemical-count #14 at 3.9M lbs. Buick Mine/mill leads reported pounds (48.2M lbs) at 8 chemicals (chemical-count #66). Buzzi Unicem Usa-Cape Girardeau leads chemical count at 87 chemicals (904.5K lbs, pounds #44). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Univar Solutions USA; Lhb Industries; St. Louis Cold Drawn; The Boeing Co. Similar-scale Electric Utilities peers outside Missouri: Pacificorp Wyodak Plant; Edwards Power Station; Newton Energy Center; American Electric Power Kammer/mitchell Plant. Other Ameren Corp sites in this extract: Ameren Missouri Labadie Energy Center; Ameren Missouri Rush Island Energy Center; Ameren Missouri Meramec Energy Center. Largest disclosed chemicals by pounds: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Barium And Barium Compounds; Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Zinc compounds.
Ameren Missouri Sioux Energy Center stamps HEAVY volume with a dominant LAND pathway (83.1% land disposal) across 21 chemicals · 3 carcinogen-classified. Cumulative Form-R extract: 3.9M lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Pacificorp Wyodak Plant and Edwards Power Station.
Ameren Missouri Sioux Energy Center vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
3.9M 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
Ameren Missouri Sioux Energy Center inside St. Charles's TRI pounds
Among the 513 Electric Utilities facilities in this database, Ameren Missouri Sioux Energy Center reports the 97th-largest volume, placing it in the top 18.9% of its sector. This one site accounts for 63.1% of every pound reported in St. Charles. Scale peers outside Missouri include Pacificorp Wyodak Plant and Edwards Power Station.
County-dominant here means ≥25% of St. Charles's reported pounds (6.2M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Ameren Missouri Sioux Energy Center's total reported releases fell from 796.7 thousand lb in 2022 to 629.3 thousand lb in 2023, based on EPA TRI filings.
- Ameren Missouri Sioux Energy Center's air releases fell from 145.7 thousand lb in 2022 to 84.5 thousand lb in 2023, based on EPA TRI filings.
- Ameren Missouri Sioux Energy Center's land releases fell from 650.8 thousand lb in 2022 to 544.5 thousand lb in 2023, based on EPA TRI filings.
- Ameren Missouri Sioux Energy Center's chemicals reported fell from 14 in 2022 to 13 in 2023, based on EPA TRI filings.
Ameren Missouri Sioux Energy Center Form-R facts
Compare this facility
See how Ameren Missouri Sioux Energy Center stacks up against nearby facilities and the typical reporter.
1291258.1× more than the comparison
7.0× 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 Ameren Missouri Sioux Energy Center releases toxic chemicals into the environment. Total: 3.9M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 28% (873.7K lbs to 629.3K lbs).
Ameren Missouri Sioux Energy Center: annual Form-R pounds
HEAVY site · LAND pathway · TRI years 2019–2023
- 2019
- 2020
- 2021
- 2022
- 2023
What this shows Ameren Missouri Sioux Energy Center year-over-year reported totals (decreased by 28% 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: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 873.7K lbs | 13 |
| 2020 | 733.0K lbs | 13 |
| 2021 | 892.7K lbs | 13 |
| 2022 | 796.7K lbs | 14 |
| 2023 | 629.3K lbs | 13 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 3 of 21 chemicals are carcinogens. Sorted by total release volume.
Ameren Missouri Sioux Energy Center · LAND-pathway site
Nearest TRI Facilities to Ameren Missouri Sioux Energy Center
Closest other reporters in Missouri - including Univar Solutions USA, Lhb Industries, St. Louis Cold Drawn, ordered by distance.
Showing 8 of 490 other reporting facilities in Missouri.
Similar Electric Utilities Facilities
Other Electric Utilities facilities with similar total release volumes (±80%), outside Missouri - e.g. Pacificorp Wyodak Plant, Edwards Power Station, Newton Energy Center.
Compare beyond Missouri
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Ameren Missouri Sioux Energy Center on cumulative reported pounds (3.9M lbs) and distinct chemical count (21). Release-pound peers include Ineos USA LLC - Chocolate Bayou Plant, Domtar Paper Co LLC Hawesville Mill, Real Alloy Recycling LLC. Chemical-count peers include Clean Earth of North Jersey Inc, Cleveland-Cliffs Monessen Coke LLC, Uss Mon Valley Works - Edgar Thomson Plant. 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).
Other Ameren Corp Facilities
Same-parent TRI sites ranked by reported releases - including Ameren Missouri Labadie Energy Center, Ameren Missouri Rush Island Energy Center, Ameren Missouri Meramec Energy Center.
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 Barium compounds (except for barium sulfate (CAS No. 7727-43-7)), Barium And Barium Compounds, Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Zinc compounds; nearby reporters include Univar Solutions USA. Ameren Missouri Sioux Energy Center stamps HEAVY volume · LAND pathway · TRACE-CARC 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 Ameren Missouri Sioux Energy Center TRI extract (HEAVY · LAND · TRACE-CARC · lead Barium compounds (except for barium sulfate (CAS No. 7727-43-7))) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Ameren Missouri Sioux Energy Center totals are self-reported EPCRA §313 estimates for West Alton, MO, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 221112 · Electric Utilities. 63.1% of St. Charles TRI pounds in this extract. Nearest ABS peer: Ineos USA LLC - Chocolate Bayou Plant (Δ 6.9K lbs). Pounds ≠ exposure.
Ameren Missouri Sioux Energy Center stamps HEAVY volume · LAND pathway · TRACE-CARC · lead Barium compounds (except for barium sulfate (CAS No. 7727-43-7)). 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