Nisource Inc
2 facilities · 1 state · 11.3M lbs total releases
According to the EPA Toxics Release Inventory, Nisource Inc is the reported parent of 2 Form R facilities across 1 state, disclosing 11.3M lbs of toxic releases. 6 of 43 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Indiana (11.3M lbs). Those TRI figures remain self-reported disclosure pounds for Nisource Inc, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Nisource Inc: EPA TRI 2023 reporting year
Same facilities, both years
-21.4%
2 facilities that filed in 2022 and 2023
Whole inventory
-21.4%
2.0 million lb → 1.6 million lb, every facility that filed
- Nisource Inc's total reported releases fell from 2.0 million lb in 2022 to 1.6 million lb in 2023, based on EPA TRI filings.
- Nisource Inc's air releases fell from 775.7 thousand lb in 2022 to 540.4 thousand lb in 2023, based on EPA TRI filings.
- Nisource Inc's land releases fell from 550.1 thousand lb in 2022 to 387.5 thousand lb in 2023, based on EPA TRI filings.
- Nisource Inc's water releases rose from 26.7 thousand lb in 2022 to 29.2 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Nisource Inc from filing to facility
Largest Form R sites under this parent: Nipsco R.m.schahfer Generating Station; Nipsco Michigan City Generating Station. Neighbor parents on the disclosure ladder: Cleveland-Cliffs Inc; US Steel Corp; Bp America Inc; Ohio Valley Electric Corp. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Barium And Barium Compounds; Zinc compounds; Vanadium compounds. Heaviest-reporting states in this extract: Indiana. 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: Nipsco R.m.schahfer Generating Station; Nipsco Michigan City Generating Station. Neighbor parents on the disclosure ladder: Cleveland-Cliffs Inc; US Steel Corp; Bp America Inc; Ohio Valley Electric Corp. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Barium And Barium Compounds; Zinc compounds; Vanadium compounds. Heaviest-reporting states in this extract: Indiana. Industry labels on the parent rollup: Electric Utilities.
Nisource Inc ranks #146 of 4,988 slug-merged TRI parents by disclosed release pounds, mid-to-upper among parents, not a top-25 volume name. Nisource Inc's TRI Form R footprint is concentrated in a single state (Indiana), so statewide context matters more than a multi-state portfolio read. Releases are facility-concentrated: Nipsco R.m.schahfer Generating Station accounts for most of Nisource Inc's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Nisource Inc follows facility-reported names. Compare the named neighbors (Cleveland-Cliffs Inc; US Steel Corp; Bp America Inc) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Nisource Inc sits among TRI parents
Nisource Inc sits on a disclosure ladder beside Cleveland-Cliffs Inc and US Steel Corp and Bp America Inc and Ohio Valley Electric Corp. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Cleveland-Cliffs Inc · rank #144 · 131.7M lbs
- US Steel Corp · rank #145 · 79.2M lbs
Lower disclosed volume
- Bp America Inc · rank #147 · 7.6M lbs
- Ohio Valley Electric Corp · rank #148 · 7.0M lbs
Largest chemicals disclosed by Nisource Inc
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Barium compounds (except for barium sulfate (CAS No. 7727-43-7)); Barium And Barium Compounds; Zinc compounds; Vanadium compounds lead the Form R pound rollup for this parent, including filings such as Nipsco R.m.schahfer Generating Station. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 3.5M lbs |
| Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | 2.8M lbs |
| Barium And Barium Compounds | 1.2M lbs |
| Zinc compounds | 880.1K lbs |
| Vanadium compounds | 698.9K lbs |
Facilities (2)
| Facility | Releases |
|---|---|
| Nipsco R.m.schahfer Generating Station Wheatfield, IN | 8.3M lbs |
| Nipsco Michigan City Generating Station Michigan City, IN | 3.0M 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 Nisource Inc on total disclosed release pounds (11.3M lbs) and reporting facility count (2). Release-volume peers include Suncoke Energy Inc, Dupont de Nemours Inc, Dominion Energy Inc. 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.
About This Data
EPA TRI parent totals cover all media. This extract's heaviest states for the parent are Indiana; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Nisource Inc's TRI parent record
From Nisource Inc, open Nipsco R.m.schahfer Generating Station or compare against Cleveland-Cliffs Inc rather than reading rank alone.
- Open the largest Form R site for Nisource Inc (Nipsco R.m.schahfer Generating Station in IN). Largest facility
- Compare against US Steel Corp, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Nisource Inc sits among all slug-merged TRI parents. All parent companies
Rank and peers (Cleveland-Cliffs Inc, US Steel Corp) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Nisource Inc'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.