EPA TRI Facility · Electric Utilities
Thomas Hill Energy Center
Clifton Hill, MO · Parent: Associated Electric Cooperative Inc
- Total releases
- 5.3M lbs
- Chemicals reported
- 17
- Carcinogens
- 2
- Primary pathway
- Land Disposal
MIXED Form-R mix
Thomas Hill Energy Center: how the 5.3M lbs splits
5.3M lbs across all reported pathways
- Land Disposal 3.5M lbs 66.8%
- Air Releases 1.7M lbs 32.4%
- Off-site Transfers 36.7K lbs 0.7%
- Water Discharges 8.4K lbs 0.2%
Thomas Hill Energy Center's 5.3M lbs Form-R total is MIXED - land disposal is 66.8% of the bar. Next segment: air releases at 32.4%. 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 MIXED pathway TRACE-CARC
Thomas Hill Energy Center is an EPA Toxics Release Inventory reporter in Clifton Hill, MO, in the electric utilities sector. It reported 1.0M lbs of releases across 12 chemicals in 2023, and 5.3M lbs in total across its 2019-2023 reporting years. That ranks 405 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. Thomas Hill Energy Center is pounds #11 and chemical-count #19 at 5.3M 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: Qualico Precision Products LLC; Wilson Trailer Co; Swift Prepared Foods - Moberly; US Army National Guard Macon Ranges. Similar-scale Electric Utilities peers outside Missouri: Weston Power Plant; Duke Energy Progress LLC - Roxboro Steam Electric Plant; American Electric Power H.w. Pirkey Power Plant; Basin Electric Dry Fork Station. Other Associated Electric Cooperative Inc sites in this extract: Associated Electric Cooperative Inc New Madrid Power Plant; Aeci Dell Power Plant. Largest disclosed chemicals by pounds: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Hydrogen fluoride; Barium And Barium Compounds; Ammonia.
Thomas Hill Energy Center is a HEAVY · MIXED-pathway Form-R site in Clifton Hill, MO: 5.3M lbs across 17 chemicals (2 carcinogen-classified, TRACE-CARC). No single media clears 70% of the bar (lead segment land disposal at 66.8%). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Weston Power Plant and Duke Energy Progress LLC - Roxboro Steam Electric Plant.
Thomas Hill Energy Center vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
5.3M 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
Thomas Hill Energy Center inside Randolph's TRI pounds
Among the 513 Electric Utilities facilities in this database, Thomas Hill Energy Center reports the 77th-largest volume, placing it in the top 15% of its sector. This one site accounts for 99.4% of every pound reported in Randolph. Scale peers outside Missouri include Weston Power Plant and Duke Energy Progress LLC - Roxboro Steam Electric Plant.
County-dominant here means ≥25% of Randolph's reported pounds (5.3M lbs county total). Shares only print when the site reports ≥1,000 lbs.
Annual disclosure change
What changed: EPA TRI 2023 reporting year
- Thomas Hill Energy Center's total reported releases fell from 1.2 million lb in 2022 to 1.0 million lb in 2023, based on EPA TRI filings.
- Thomas Hill Energy Center's water releases fell from 1.5 thousand lb in 2022 to 295 lb in 2023, based on EPA TRI filings.
- Thomas Hill Energy Center's land releases fell from 913.4 thousand lb in 2022 to 764.3 thousand lb in 2023, based on EPA TRI filings.
- Thomas Hill Energy Center's air releases fell from 300.0 thousand lb in 2022 to 255.8 thousand lb in 2023, based on EPA TRI filings.
Thomas Hill Energy Center Form-R facts
Compare this facility
See how Thomas Hill Energy Center stacks up against nearby facilities and the typical reporter.
64357.1× more than the comparison
5.7× 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 Thomas Hill Energy Center releases toxic chemicals into the environment. Total: 5.3M lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 18% (1.3M lbs to 1.0M lbs).
Thomas Hill Energy Center: annual Form-R pounds
HEAVY site · MIXED pathway · TRI years 2019–2023
- 2019
- 2020
- 2021
- 2022
- 2023
What this shows Thomas Hill Energy Center year-over-year reported totals (decreased by 18% 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 | 1.3M lbs | 13 |
| 2020 | 734.6K lbs | 12 |
| 2021 | 1.0M lbs | 14 |
| 2022 | 1.2M lbs | 12 |
| 2023 | 1.0M lbs | 12 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 2 of 17 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 2.4M lbs | - |
| Hydrogen fluoride | 1.2M lbs | - |
| Barium And Barium Compounds | 820.6K lbs | - |
| Ammonia | 311.2K lbs | - |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 161.4K lbs | - |
| Vanadium compounds | 160.1K lbs | - |
| Copper compounds | 64.2K lbs | - |
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 59.3K lbs | - |
| Zinc compounds | 50.4K lbs | - |
| Manganese compounds | 49.5K lbs | - |
| Copper And Copper Compounds | 23.0K lbs | - |
| Lead compounds | 17.4K lbs | - |
| Manganese And Manganese Compounds | 16.6K lbs | - |
| Chromium compounds (except for chromite ore mined in the Transvaal Region) | 15.5K lbs | - |
| Nickel | 4.8K lbs | Carcinogen |
| Mercury compounds | 772 lbs | - |
| Dioxin and dioxin-like compounds | 0 lbs | Carcinogen |
Thomas Hill Energy Center in Randolph
Nearest TRI Facilities to Thomas Hill Energy Center
Closest other reporters in Missouri - including Qualico Precision Products LLC, Wilson Trailer Co, Swift Prepared Foods - Moberly, 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. Weston Power Plant, Duke Energy Progress LLC - Roxboro Steam Electric Plant, American Electric Power H.w. Pirkey Power Plant.
Compare beyond Missouri
Nationwide peers by reported pounds & chemical count
Cross-state TRI reporters nearest Thomas Hill Energy Center on cumulative reported pounds (5.3M lbs) and distinct chemical count (17). Release-pound peers include Green Bay Packaging Inc. Arkansas Kraft Div, Vibrantz Specialty Products LLC, Asarco LLC Ray Mine Operations. Chemical-count peers include Astro Chemicals Inc, Doremus Terminal LLC, Rq Resins 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.
- Green Bay Packaging Inc. Arkansas Kraft Div Morrilton, AR · Paper 5.3M lbs reported
- Vibrantz Specialty Products LLC Baltimore, MD · Chemicals 5.3M lbs reported
- Asarco LLC Ray Mine Operations Kearny, AZ · Metal Mining 5.3M lbs reported
- Diamond Shamrock Refining Co LP Sunray, TX · Petroleum 5.3M lbs reported
Similar chemical count
Nearest out-of-state reporters by distinct Form-R chemicals (deduped against the release-pound neighborhood).
Other Associated Electric Cooperative Inc Facilities
Same-parent TRI sites ranked by reported releases - including Associated Electric Cooperative Inc New Madrid Power Plant, Aeci Dell Power Plant.
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)), Hydrogen fluoride, Barium And Barium Compounds, Ammonia; nearby reporters include Qualico Precision Products LLC. Thomas Hill Energy Center stamps HEAVY volume · MIXED 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 Thomas Hill Energy Center TRI extract (HEAVY · MIXED · 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.
Thomas Hill Energy Center totals are self-reported EPCRA §313 estimates for Clifton Hill, MO, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 221112 · Electric Utilities. 99.4% of Randolph TRI pounds in this extract. Nearest ABS peer: Green Bay Packaging Inc. Arkansas Kraft Div (Δ 11.3K lbs). Pounds ≠ exposure.
Thomas Hill Energy Center stamps HEAVY · MIXED pathway (land disposal leads at 66.8%). 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