EPA TRI Facility · Electric Utilities
Southern Illinois Power Cooperative
Marion, IL
- Total releases
- 1.6M lbs
- Chemicals reported
- 24
- Carcinogens
- 5
- Primary pathway
- Off-site Transfers
MIXED Form-R mix
Southern Illinois Power Cooperative: how the 1.6M lbs splits
1.6M lbs across all reported pathways
- Off-site Transfers 999.7K lbs 64.3%
- Air Releases 555.6K lbs 35.7%
Southern Illinois Power Cooperative's 1.6M lbs Form-R total is MIXED - off-site transfers is 64.3% of the bar. Next segment: air releases at 35.7%. Leading chemical by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
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
Southern Illinois Power Cooperative is an EPA Toxics Release Inventory reporter in Marion, IL, in the electric utilities sector. It reported 85.7K lbs of releases across 16 chemicals in 2023, and 1.6M lbs in total across its 2019-2023 reporting years. That ranks 1,013 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Illinois's 951 reporting TRI sites, pounds #1 is not chemical-count #1. Southern Illinois Power Cooperative is pounds #40 and chemical-count #10 at 1.6M lbs. Prairie State Generating Co leads reported pounds (37.9M lbs) at 31 chemicals (chemical-count #8). Veolia N.a. Inc. leads chemical count at 141 chemicals (1.9M lbs, pounds #34). Reported volume fell against 2022. Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: U.s.p. Marion; Diagraph Marking & Coding; Aisin Manufacturing Illinois LLC; Reaco Battery Service. Similar-scale Electric Utilities peers outside Illinois: Virginia City Hybrid Energy Center; American Electric Power Flint Creek Plant; Lawrence Energy Center; Lcra Fayette Power Project. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Zinc compounds; Manganese And Manganese Compounds; Barium compounds (except for barium sulfate (CAS No. 7727-43-7)).
Southern Illinois Power Cooperative is a HEAVY · MIXED-pathway Form-R site in Marion, IL: 1.6M lbs across 24 chemicals (5 carcinogen-classified, CARC-LEAN). No single media clears 70% of the bar (lead segment off-site transfers at 64.3%). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Virginia City Hybrid Energy Center and American Electric Power Flint Creek Plant.
Southern Illinois Power Cooperative vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
1.6M lbs Top 4% higher than 96% 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
Southern Illinois Power Cooperative inside Williamson's TRI pounds
Among the 513 Electric Utilities facilities in this database, Southern Illinois Power Cooperative reports the 160th-largest volume (1.6M lbs). This one site accounts for 67.7% of every pound reported in Williamson. Scale peers outside Illinois include Virginia City Hybrid Energy Center and American Electric Power Flint Creek Plant.
County-dominant here means ≥25% of Williamson's reported pounds (2.3M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Southern Illinois Power Cooperative's total reported releases fell from 94.0 thousand lb in 2022 to 85.7 thousand lb in 2023, based on EPA TRI filings.
- Southern Illinois Power Cooperative's air releases fell from 94.0 thousand lb in 2022 to 85.7 thousand lb in 2023, based on EPA TRI filings.
Southern Illinois Power Cooperative Form-R facts
Compare this facility
See how Southern Illinois Power Cooperative stacks up against nearby facilities and the typical reporter.
549.1× more than the comparison
24.0× 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 Southern Illinois Power Cooperative releases toxic chemicals into the environment. Total: 1.6M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 88% (738.7K lbs to 85.7K lbs).
Southern Illinois Power Cooperative: annual Form-R pounds
HEAVY site · MIXED pathway · TRI years 2019–2023
- 2019
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Southern Illinois Power Cooperative year-over-year reported totals (decreased by 88% 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: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 738.7K lbs | 16 |
| 2020 | 476.5K lbs | 16 |
| 2021 | 160.3K lbs | 16 |
| 2022 | 94.0K lbs | 16 |
| 2023 | 85.7K lbs | 16 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 5 of 24 chemicals are carcinogens. Sorted by total release volume.
Southern Illinois Power Cooperative in Williamson
Nearest TRI Facilities to Southern Illinois Power Cooperative
Closest other reporters in Illinois - including U.s.p. Marion, Diagraph Marking & Coding, Aisin Manufacturing Illinois LLC, ordered by distance.
Showing 8 of 950 other reporting facilities in Illinois.
Similar Electric Utilities Facilities
Other Electric Utilities facilities with similar total release volumes (±80%), outside Illinois - e.g. Virginia City Hybrid Energy Center, American Electric Power Flint Creek Plant, Lawrence Energy Center.
Compare beyond Illinois
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Southern Illinois Power Cooperative on cumulative reported pounds (1.6M lbs) and distinct chemical count (24). Release-pound peers include Cytec Industries Inc, 3M Co - Tonawanda, Johns Manville Corp Plant 8. Chemical-count peers include Duke Energy Carolinas LLC - Belews Creek Steam Station, Kapstone Paper & Packaging Corp, Georgia-Pacific Cedar Springs 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.
- Cytec Industries Inc Willow Island, WV · Chemicals 1.6M lbs reported
- 3M Co - Tonawanda Tonawanda, NY · Chemicals 1.6M lbs reported
- Johns Manville Corp Plant 8 Defiance, OH · Nonmetallic Mineral Product 1.6M lbs reported
- Seabring Marine Industries Inc. Williston, FL · Transportation Equipment 1.6M lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
- Duke Energy Carolinas LLC - Belews Creek Steam Station Walnut Cove, NC · Electric Utilities 24 chemicals
- Kapstone Paper & Packaging Corp North Charleston, SC · Paper 24 chemicals
- Georgia-Pacific Cedar Springs LLC Cedar Springs, GA · Paper 24 chemicals
- International Paper Pensacola Mill Cantonment, FL · Paper 24 chemicals
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 Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size), Zinc compounds, Manganese And Manganese Compounds, Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); nearby reporters include U.s.p. Marion. Southern Illinois Power Cooperative 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 Southern Illinois Power Cooperative TRI extract (HEAVY · MIXED · CARC-LEAN · lead Sulfuric 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.
Southern Illinois Power Cooperative totals are self-reported EPCRA §313 estimates for Marion, IL, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 221112 · Electric Utilities. 67.7% of Williamson TRI pounds in this extract. Nearest ABS peer: Cytec Industries Inc (Δ 150 lbs). Pounds ≠ exposure.
Southern Illinois Power Cooperative stamps HEAVY · MIXED pathway (off-site transfers leads at 64.3%). 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