Mountain State Energy Holdings LLC
1 facility · 1 state · 3.3M lbs total releases
According to the EPA Toxics Release Inventory, Mountain State Energy Holdings LLC is the reported parent of 1 Form R facility across 1 state, disclosing 3.3M lbs of toxic releases. 4 of 16 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is West Virginia (3.3M lbs). Those TRI figures remain self-reported disclosure pounds for Mountain State Energy Holdings LLC, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Mountain State Energy Holdings LLC: EPA TRI 2023 reporting year
Same facilities, both years
+19.9%
1 facilities that filed in 2022 and 2023
Whole inventory
+19.9%
64.4 thousand lb → 77.2 thousand lb, every facility that filed
- Mountain State Energy Holdings LLC's total reported releases rose from 64.4 thousand lb in 2022 to 77.2 thousand lb in 2023, based on EPA TRI filings.
- Mountain State Energy Holdings LLC's water releases rose from 6 lb in 2022 to 49 lb in 2023, based on EPA TRI filings.
- Mountain State Energy Holdings LLC's air releases rose from 64.4 thousand lb in 2022 to 77.1 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Mountain State Energy Holdings LLC from filing to facility
Mountain State Energy Holdings LLC maps to a single Form R site (Longview Power) in West Virginia. Open that filing for the chemical mix; 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: Longview Power. Neighbor parents on the disclosure ladder: Firstenergy Corp; American Electric Power; Ferroglobe USA Inc; Cleveland Cliffs Inc.. Largest disclosed chemicals by pounds: Barium And Barium Compounds; Manganese And Manganese Compounds; Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region); Zinc compounds. Heaviest-reporting states in this extract: West Virginia. Industry labels on the parent rollup: Electric Utilities.
Mountain State Energy Holdings LLC ranks #347 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Mountain State Energy Holdings LLC's TRI Form R footprint is concentrated in a single state (West Virginia), so statewide context matters more than a multi-state portfolio read. This parent maps to a single reporting facility (Longview Power), so the company total and that site's Form R are the same disclosure.
Parent aggregation for Mountain State Energy Holdings LLC follows facility-reported names. Compare the named neighbors (Firstenergy Corp; American Electric Power; Ferroglobe USA Inc) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Mountain State Energy Holdings LLC sits among TRI parents
Mountain State Energy Holdings LLC sits on a disclosure ladder beside Firstenergy Corp and American Electric Power and Ferroglobe USA Inc and Cleveland Cliffs Inc.. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Firstenergy Corp · rank #345 · 38.5M lbs
- American Electric Power · rank #346 · 22.7M lbs
Lower disclosed volume
- Ferroglobe USA Inc · rank #348 · 2.6M lbs
- Cleveland Cliffs Inc. · rank #349 · 2.1M lbs
Largest chemicals disclosed by Mountain State Energy Holdings LLC
Barium And Barium Compounds; Manganese And Manganese Compounds; Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region); Zinc compounds lead the Form R pound rollup for this parent, including filings such as Longview Power. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Barium And Barium Compounds | 1.3M lbs |
| Manganese And Manganese Compounds | 720.1K lbs |
| Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 621.3K lbs |
| Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 327.2K lbs |
| Zinc compounds | 135.2K lbs |
Facilities (1)
| Facility | Releases |
|---|---|
| Longview Power Maidsville, WV | 3.3M 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 Mountain State Energy Holdings LLC on total disclosed release pounds (3.3M lbs) and reporting facility count (1). Release-volume peers include Toyota Motor N.a. Inc, Pmc Group Inc, Puerto Rico Electric Power Authority. 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 West Virginia; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Mountain State Energy Holdings LLC's TRI parent record
From Mountain State Energy Holdings LLC, open Longview Power or compare against Firstenergy Corp rather than reading rank alone.
- Open the largest Form R site for Mountain State Energy Holdings LLC (Longview Power in WV). Largest facility
- Compare against American Electric Power, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Mountain State Energy Holdings LLC sits among all slug-merged TRI parents. All parent companies
Rank and peers (Firstenergy Corp, American Electric Power) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Mountain State Energy Holdings LLC'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.