PlainEnviro

Annual disclosure comparison

EPA TRI releases: what changed from 2022 to 2023

PlainEnviro compared annual Toxic Release Inventory filings for the latest two complete reporting years in this database. Across all stored records, reported release volume rose from 3.14 billion lb in 2022 to 3.27 billion lb in 2023 (+4.1%). This is a disclosure-volume change, not a toxicity, exposure, compliance, or health-risk judgment.

Download change CSV Read the method

National comparison at a glance

Comparable facilities
20,901
Reported more pounds
7,685
Reported fewer pounds
8,991
No pound change
4,225

Largest absolute increases in reported pounds

Facilities are ordered by the arithmetic change in reported TRI pounds among facilities present in both years. A larger increase does not mean greater toxicity or measured exposure.

FacilityState20222023Change
Red Dog Operations Alaska 658.7 million lb 771.3 million lb +112.6 million lb
Kennecott Utah Copper Mine Concentrators & Power Plant Utah 132.4 million lb 242.8 million lb +110.4 million lb
Asarco LLC Ray Complex/ Hayden Smelter & Concentrator Arizona 2.9 million lb 49.4 million lb +46.6 million lb
Dark Horse Treating Facility New Mexico 57.7 million lb 73.6 million lb +15.9 million lb
Eunice Gas Plant New Mexico 298.0 thousand lb 12.3 million lb +12.0 million lb
King Ranch Gas Plant Texas 39.1 thousand lb 9.8 million lb +9.7 million lb
Hecla Greens Creek Mining Co Alaska 90.0 million lb 98.1 million lb +8.1 million lb
Coeur Rochester Inc Nevada 2.1 million lb 9.2 million lb +7.2 million lb
Waelz Sustainable Products LLC Indiana 3.1 million lb 9.1 million lb +5.9 million lb
Dagger Draw Gas Plant New Mexico 7.6 million lb 12.5 million lb +4.9 million lb
Chemical Waste Management Alabama 22.1 million lb 26.6 million lb +4.5 million lb
Imco Recycling of Ohio LLC Ohio 29.2 thousand lb 4.5 million lb +4.5 million lb
Monument Gas Plant New Mexico 166.2 thousand lb 4.7 million lb +4.5 million lb
U.S. Army Radford Army Ammunition Plant Virginia 8.2 million lb 12.0 million lb +3.8 million lb
Cripple Creek & Victor Gold Mining Co Colorado 2.5 million lb 5.7 million lb +3.2 million lb
Pinto Valley Mine Arizona 6.8 million lb 9.5 million lb +2.7 million lb
Cleveland-Cliffs Cleveland Works LLC Ohio 5.2 million lb 7.6 million lb +2.5 million lb
Wayne Disposal Inc Michigan 1.2 million lb 3.3 million lb +2.1 million lb
Blanchard Refining Co LLC Texas 4.7 million lb 6.8 million lb +2.1 million lb
Southwest Cheese LLC New Mexico 106.8 thousand lb 2.1 million lb +2.0 million lb

Largest absolute decreases in reported pounds

These are disclosure changes, not claims about why a total moved. Production, waste handling, estimation methods, ownership, and reporting corrections can all change annual TRI figures.

FacilityState20222023Change
Sand Hills Gas Plant Texas 40.5 million lb 20.3 million lb -20.2 million lb
Nevada Gold Mines LLC - Goldstrike Mines Inc Nevada 38.0 million lb 18.0 million lb -20.0 million lb
Nevada Gold Mines LLC - Phoenix Mine Nevada 23.2 million lb 7.0 million lb -16.2 million lb
Nevada Gold Mines Llc-Cortez District Nevada 17.3 million lb 1.5 million lb -15.8 million lb
Clean Harbors Grassy Mountain LLC Utah 14.4 million lb 5.9 million lb -8.5 million lb
Smoky Valley Common Operation Nevada 13.4 million lb 5.7 million lb -7.7 million lb
Robinson Nevada Mining Co Nevada 20.9 million lb 13.8 million lb -7.1 million lb
Cleveland-Cliffs Steel Corp (rockport Works ) Indiana 14.1 million lb 8.8 million lb -5.3 million lb
Chemours Delisle Plant Mississippi 13.3 million lb 8.3 million lb -5.0 million lb
Clean Harbors Buttonwillow LLC California 13.1 million lb 8.1 million lb -5.0 million lb
Cleveland-Cliffs Steel LLC Indiana 5.1 million lb 438.3 thousand lb -4.7 million lb
Nyrstar Clarksville Inc Tennessee 16.9 million lb 12.6 million lb -4.3 million lb
Nasa Marshall Space Flight Center Alabama 4.3 million lb 110.1 thousand lb -4.2 million lb
Asarco LLC Mission Complex Arizona 6.4 million lb 2.2 million lb -4.2 million lb
Cleveland-Cliffs Burns Harbor LLC Indiana 12.5 million lb 8.6 million lb -3.8 million lb
Harrison Power Station West Virginia 7.4 million lb 3.6 million lb -3.8 million lb
Tronox LLC Mississippi 13.2 million lb 9.8 million lb -3.4 million lb
W H Sammis Plant Ohio 4.3 million lb 985.3 thousand lb -3.3 million lb
Chevron Oronite Co LLC - Oak Point Plant Louisiana 7.8 million lb 4.6 million lb -3.3 million lb
Enersys Energy Products Inc-Springfield 2 (formerly Northsta Missouri 3.0 million lb 12.3 thousand lb -2.9 million lb

Method, completeness rule, and limits

PlainEnviro sums each facility's annual EPA TRI records, then compares facilities appearing in both selected years. National totals include every stored filing in each complete year. The year selector requires at least 17,804 distinct facilities, 80% of the fullest stored annual cohort (22,255 facilities), before a year can represent a national comparison.

The stored 2024 load (3,447 facilities) did not clear that floor and is excluded. This prevents a partial newest-year load from manufacturing a false national decline.

TRI quantities are facility-reported estimates under EPCRA Section 313. EPA reports dioxin and dioxin-like compounds in grams; PlainEnviro converts those values at 453.59237 grams per pound before aggregation so every displayed release total has one unit. Pounds across chemicals and release pathways are not toxicity-weighted. A change can reflect production, estimation, waste-rock handling, ownership, or source corrections; it does not establish causation, compliance, exposure, or local health risk.

Source: EPA TRI Basic Data Files. PlainEnviro database vintage: . Read the portal's full methodology.