Wec Energy Group
4 facilities · 2 states · 7.5M lbs total releases
According to the EPA Toxics Release Inventory, Wec Energy Group is the reported parent of 4 Form R facilities across 2 states, disclosing 7.5M lbs of toxic releases. 6 of 41 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Wisconsin (7.5M lbs). Those TRI figures remain self-reported disclosure pounds for Wec Energy Group, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Wec Energy Group: EPA TRI 2023 reporting year
Same facilities, both years
+3.5%
3 facilities that filed in 2022 and 2023
Whole inventory
+3.5%
1.3 million lb → 1.4 million lb, every facility that filed
- Wec Energy Group's total reported releases rose from 1.3 million lb in 2022 to 1.4 million lb in 2023, based on EPA TRI filings.
- Wec Energy Group's land releases fell from 370.5 thousand lb in 2022 to 63.5 thousand lb in 2023, based on EPA TRI filings.
- Wec Energy Group's off-site transfers rose from 806.3 thousand lb in 2022 to 1.2 million lb in 2023, based on EPA TRI filings.
- Wec Energy Group's water releases fell from 3.5 thousand lb in 2022 to 3.1 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Wec Energy Group from filing to facility
Largest Form R sites under this parent: Weston Power Plant; Oak Creek Site; Whitewater Generating Station; Presque Isle Power Plant. Neighbor parents on the disclosure ladder: Foremost Farms USA Cooperative; Monomoy Capital Partners LLC; Alliant Energy Corp. Largest disclosed chemicals by pounds: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese compounds; Ammonia; Vanadium compounds. Heaviest-reporting states in this extract: Wisconsin; Michigan. Industry labels on the parent rollup: Electric Utilities. Start from those named sites and neighbors rather than a generic parent blurb; pounds stay disclosure, not risk.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files Toxics Release Inventory (TRI) · August 2026
Largest Form R sites under this parent: Weston Power Plant; Oak Creek Site; Whitewater Generating Station; Presque Isle Power Plant. Neighbor parents on the disclosure ladder: Foremost Farms USA Cooperative; Monomoy Capital Partners LLC; Alliant Energy Corp. Largest disclosed chemicals by pounds: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese compounds; Ammonia; Vanadium compounds. Heaviest-reporting states in this extract: Wisconsin; Michigan. Industry labels on the parent rollup: Electric Utilities.
Wec Energy Group ranks #198 of 4,988 slug-merged TRI parents by disclosed release pounds, mid-to-upper among parents, not a top-25 volume name. Wec Energy Group files across 2 states, a regional parent portfolio rather than a single-state discloser. Releases are facility-concentrated: Weston Power Plant accounts for most of Wec Energy Group's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Wec Energy Group follows facility-reported names. Compare the named neighbors (Foremost Farms USA Cooperative; Monomoy Capital Partners LLC; Alliant Energy Corp) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Wec Energy Group sits among TRI parents
Wec Energy Group sits on a disclosure ladder beside Foremost Farms USA Cooperative and Monomoy Capital Partners LLC and Alliant Energy Corp. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Foremost Farms USA Cooperative · rank #196 · 11.6M lbs
Lower disclosed volume
- Monomoy Capital Partners LLC · rank #199 · 7.3M lbs
- Alliant Energy Corp · rank #200 · 6.8M lbs
Largest chemicals disclosed by Wec Energy Group
Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese compounds; Ammonia; Vanadium compounds lead the Form R pound rollup for this parent, including filings such as Weston Power Plant. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 5.8M lbs |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 334.7K lbs |
| Manganese compounds | 280.0K lbs |
| Ammonia | 205.4K lbs |
| Vanadium compounds | 202.3K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Wisconsin | 3 | 7.5M lbs |
| Michigan | 1 | 13.6K lbs |
Facilities (4)
| Facility | Releases |
|---|---|
| Weston Power Plant Mosinee, WI | 5.4M lbs |
| Oak Creek Site Oak Creek, WI | 2.0M lbs |
| Whitewater Generating Station Whitewater, WI | 117.2K lbs |
| Presque Isle Power Plant Marquette, MI | 13.6K lbs |
Frequently Asked Questions
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Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Wec Energy Group on total disclosed release pounds (7.5M lbs) and reporting facility count (4). Release-volume peers include Milliken & Co, Bp America Inc, Ati Inc. Facility-count peers include A Stucki Holding Corp, Advanced Heat Treat Corp, Alleima USA LLC. Neighborhoods are forced disjoint so each axis surfaces a different set of parents.
Similar disclosed release pounds
Nearest parents (≥3 facilities, ≥10k lbs) by absolute TRI disclosed pounds, not rank-adjacent ladder neighbors.
Similar facility count
Nearest parents by reporting-site count (deduped against the release-pound neighborhood).
About This Data
EPA TRI parent totals cover all media. This extract's heaviest states for the parent are Wisconsin, Michigan; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Wec Energy Group's TRI parent record
From Wec Energy Group, open Weston Power Plant or compare against Foremost Farms USA Cooperative rather than reading rank alone.
- Open the largest Form R site for Wec Energy Group (Weston Power Plant in WI). Largest facility
- Compare against Foremost Farms USA Cooperative, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Wec Energy Group sits among all slug-merged TRI parents. All parent companies
Rank and peers (Foremost Farms USA Cooperative, Monomoy Capital Partners LLC) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Wec Energy Group's record groups disclosed TRI parent-company filings so readers can compare reporting context without treating the total as a measure of risk.
Company release figures are computed directly from EPA Toxic Release Inventory data; source names and the record-linking method are documented in the methodology.
Primary sources
- EPA Toxics Release Inventory Basic Data Files - annual facility-level chemical-release disclosures
PlainEnviro renders public EPA records directly from its data pipeline; no figure on this page is typed in by an editor. See the editorial standards and corrections policy for how source changes and reported errors are handled.