EPA TRI Facility · Electric Utilities
Prairie State Generating Co
Marissa, IL
- Total releases
- 37.9M lbs
- Chemicals reported
- 31
- Carcinogens
- 10
- Primary pathway
- Land Disposal
LAND Form-R mix
Prairie State Generating Co: how the 37.9M lbs splits
37.9M lbs across all reported pathways
- Land Disposal 36.1M lbs 95.1%
- Air Releases 1.8M lbs 4.9%
- Water Discharges 2.3K lbs <0.1%
- Off-site Transfers 667 lbs <0.1%
Prairie State Generating Co's 37.9M lbs Form-R total is LAND - land disposal is 95.1% of the bar. Next segment: air releases at 4.9%. Leading chemical by pounds: Zinc compounds.
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 CARC-LEAN
Prairie State Generating Co is an EPA Toxics Release Inventory reporter in Marissa, IL, in the electric utilities sector. It reported 6.9M lbs of releases across 17 chemicals in 2023, and 37.9M lbs in total across its 2019-2023 reporting years. That ranks 45 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. 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: US Army National Guard Sparta Training Area Ranges; Spartan Light Metal Products Inc; Baldwin Energy Complex; Siemens Mfg Co Inc. Similar-scale Electric Utilities peers outside Illinois: Harrison Power Station; Gavin Power LLC; Colstrip Steam Electric Station; Minnkota Power Cooperative Inc. Milton R. Young Station. Largest disclosed chemicals by pounds: Zinc compounds; Vanadium compounds; Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Chromium compounds (except for chromite ore mined in the Transvaal Region).
In-state chemical count is not the pounds ranking
Illinois TRI reporters with pounds > 0 and chemicals > 0 (n=951)
- Veolia N.a. Inc.
- Prairie State Genera... 31
What this shows Veolia N.a. Inc. leads Illinois chemical count. Prairie State Generating Co leads reported pounds and sits at chemical-count #8. Chemical count is a disclosure mix, not toxicity or health risk.
Prairie State Generating Co stamps HEAVY volume with a dominant LAND pathway (95.1% land disposal) across 31 chemicals · 10 carcinogen-classified. Cumulative Form-R extract: 37.9M lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Harrison Power Station and Gavin Power LLC.
Prairie State Generating Co vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
38M lbs Top 1% higher than 100% 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
Prairie State Generating Co inside Washington's TRI pounds
Among the 513 Electric Utilities facilities in this database, Prairie State Generating Co reports the 3rd-largest volume, placing it in the top 0.6% of its sector. This one site accounts for 99.8% of every pound reported in Washington. Scale peers outside Illinois include Harrison Power Station and Gavin Power LLC.
County-dominant here means ≥25% of Washington's reported pounds (38.0M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Prairie State Generating Co's total reported releases fell from 7.2 million lb in 2022 to 6.9 million lb in 2023, based on EPA TRI filings.
- Prairie State Generating Co's water releases rose from 463 lb in 2022 to 1.3 thousand lb in 2023, based on EPA TRI filings.
- Prairie State Generating Co's air releases rose from 346.7 thousand lb in 2022 to 384.3 thousand lb in 2023, based on EPA TRI filings.
- Prairie State Generating Co's land releases fell from 6.8 million lb in 2022 to 6.6 million lb in 2023, based on EPA TRI filings.
Prairie State Generating Co Form-R facts
Compare this facility
See how Prairie State Generating Co stacks up against nearby facilities and the typical reporter.
162763.0× more than the comparison
31.0× 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 Prairie State Generating Co releases toxic chemicals into the environment. Total: 37.9M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 20% (8.7M lbs to 6.9M lbs).
Prairie State Generating Co: annual Form-R pounds
HEAVY site · LAND pathway · TRI years 2019–2023
- 2019
- 2020
- 2021
- 2022
- 2023
What this shows Prairie State Generating Co year-over-year reported totals (decreased by 20% 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: Zinc compounds.
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 8.7M lbs | 24 |
| 2020 | 8.1M lbs | 17 |
| 2021 | 7.1M lbs | 17 |
| 2022 | 7.2M lbs | 17 |
| 2023 | 6.9M lbs | 17 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 10 of 31 chemicals are carcinogens. Sorted by total release volume.
Prairie State Generating Co · LAND-pathway site
Nearest TRI Facilities to Prairie State Generating Co
Closest other reporters in Illinois - including US Army National Guard Sparta Training Area Ranges, Spartan Light Metal Products Inc, Baldwin Energy Complex, 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. Harrison Power Station, Gavin Power LLC, Colstrip Steam Electric Station.
Compare beyond Illinois
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Prairie State Generating Co on cumulative reported pounds (37.9M lbs) and distinct chemical count (31). Release-pound peers include Rubicon LLC, Freeport-McMoran Morenci Inc, Advancion Corp. Chemical-count peers include Sappi N.a. Inc. - Somerset Operations, Mount Storm Power Station, Duke Energy Florida Llc-Crystal River Power 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).
- Sappi N.a. Inc. - Somerset Operations Skowhegan, ME · Paper 31 chemicals
- Mount Storm Power Station Mount Storm, WV · Electric Utilities 31 chemicals
- Duke Energy Florida Llc-Crystal River Power Plant Crystal River, FL · Electric Utilities 31 chemicals
- Indorama Ventures Decatur, AL · Chemicals 31 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 Zinc compounds, Vanadium compounds, Barium compounds (except for barium sulfate (CAS No. 7727-43-7)), Chromium compounds (except for chromite ore mined in the Transvaal Region); nearby reporters include US Army National Guard Sparta Training Area Ranges. Prairie State Generating Co stamps HEAVY volume · LAND 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 Prairie State Generating Co TRI extract (HEAVY · LAND · CARC-LEAN · lead Zinc compounds) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Prairie State Generating Co totals are self-reported EPCRA §313 estimates for Marissa, IL, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 221112 · Electric Utilities. 99.8% of Washington TRI pounds in this extract. Nearest ABS peer: Rubicon LLC (Δ 628.7K lbs). Pounds ≠ exposure.
Prairie State Generating Co stamps HEAVY volume · LAND pathway · CARC-LEAN · lead Zinc compounds. 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