Alliant Energy Corp
7 facilities · 2 states · 8.5M lbs total releases
According to the EPA Toxics Release Inventory, Alliant Energy Corp is the reported parent of 7 Form R facilities across 2 states, disclosing 8.5M lbs of toxic releases. 6 of 97 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Wisconsin (6.8M lbs). Those TRI figures remain self-reported disclosure pounds for Alliant Energy Corp, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Alliant Energy Corp: EPA TRI 2023 reporting year
Same facilities, both years
+49.6%
4 facilities that filed in 2022 and 2023
Whole inventory
+37.8%
2.2 million lb → 3.0 million lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Alliant Energy Corp's total reported releases rose from 2.0 million lb in 2022 to 3.0 million lb in 2023, based on EPA TRI filings.
- Alliant Energy Corp's land releases rose from 1.7 million lb in 2022 to 2.8 million lb in 2023, based on EPA TRI filings.
- Alliant Energy Corp's off-site transfers fell from 55.0 thousand lb in 2022 to 38.8 thousand lb in 2023, based on EPA TRI filings.
- Alliant Energy Corp's water releases fell from 805 lb in 2022 to 592 lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Alliant Energy Corp from filing to facility
Largest Form R sites under this parent: Columbia Energy Center; Ottumwa Generating Station; Edgewater Generating Station; Lansing Power Station. Neighbor parents on the disclosure ladder: Foremost Farms USA Cooperative; Wec Energy Group; Monomoy Capital Partners LLC. Largest disclosed chemicals by pounds: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Barium And Barium Compounds; Ammonia; Vanadium compounds; Hydrogen fluoride. Heaviest-reporting states in this extract: Wisconsin; Iowa. 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: Columbia Energy Center; Ottumwa Generating Station; Edgewater Generating Station; Lansing Power Station. Neighbor parents on the disclosure ladder: Foremost Farms USA Cooperative; Wec Energy Group; Monomoy Capital Partners LLC. Largest disclosed chemicals by pounds: Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Barium And Barium Compounds; Ammonia; Vanadium compounds; Hydrogen fluoride. Heaviest-reporting states in this extract: Wisconsin; Iowa. Industry labels on the parent rollup: Electric Utilities.
Alliant Energy Corp ranks #181 of 4,988 slug-merged TRI parents by disclosed release pounds, mid-to-upper among parents, not a top-25 volume name. Alliant Energy Corp files across 2 states, a regional parent portfolio rather than a single-state discloser. Releases are facility-concentrated: Columbia Energy Center accounts for most of Alliant Energy Corp's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Alliant Energy Corp follows facility-reported names. Compare the named neighbors (Foremost Farms USA Cooperative; Wec Energy Group; Monomoy Capital Partners LLC) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Alliant Energy Corp sits among TRI parents
Alliant Energy Corp sits on a disclosure ladder beside Foremost Farms USA Cooperative and Wec Energy Group and Monomoy Capital Partners LLC. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Foremost Farms USA Cooperative · rank #179 · 11.6M lbs
Lower disclosed volume
- Wec Energy Group · rank #182 · 7.5M lbs
- Monomoy Capital Partners LLC · rank #183 · 7.3M lbs
Largest chemicals disclosed by Alliant Energy Corp
Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Barium And Barium Compounds; Ammonia; Vanadium compounds; Hydrogen fluoride lead the Form R pound rollup for this parent, including filings such as Columbia Energy Center. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 3.6M lbs |
| Barium And Barium Compounds | 2.5M lbs |
| Ammonia | 1.0M lbs |
| Vanadium compounds | 280.2K lbs |
| Hydrogen fluoride | 258.6K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Wisconsin | 3 | 6.8M lbs |
| Iowa | 4 | 1.7M lbs |
Facilities (7)
| Facility | Releases |
|---|---|
| Columbia Energy Center Pardeeville, WI | 6.4M lbs |
| Ottumwa Generating Station Ottumwa, IA | 1.0M lbs |
| Edgewater Generating Station Sheboygan, WI | 369.8K lbs |
| Lansing Power Station Lansing, IA | 362.6K lbs |
| Burlington Generating Station Burlington, IA | 198.9K lbs |
| Prairie Creek Generating Station Cedar Rapids, IA | 118.0K lbs |
| South Fond Du Lac Energy Center Fond Du Lac, WI | 18 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 Alliant Energy Corp on total disclosed release pounds (8.5M lbs) and reporting facility count (7). Release-volume peers include Chevron Phillips Chemical Co LLC, East Kentucky Power Cooperative Inc, Chs Inc. Facility-count peers include A O Smith Corp, Ahf Products LLC, Aisin Holdings of America. 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, Iowa; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Alliant Energy Corp's TRI parent record
From Alliant Energy Corp, open Columbia Energy Center or compare against Foremost Farms USA Cooperative rather than reading rank alone.
- Open the largest Form R site for Alliant Energy Corp (Columbia Energy Center 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 Alliant Energy Corp sits among all slug-merged TRI parents. All parent companies
Rank and peers (Foremost Farms USA Cooperative, Wec Energy Group) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Alliant Energy Corp'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.