Century Aluminum Co
3 facilities · 2 states · 8.6M lbs total releases
According to the EPA Toxics Release Inventory, Century Aluminum Co is the reported parent of 3 Form R facilities across 2 states, disclosing 8.6M lbs of toxic releases. 6 of 36 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Kentucky (5.9M lbs). Those TRI figures remain self-reported disclosure pounds for Century Aluminum Co, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Century Aluminum Co: EPA TRI 2023 reporting year
Same facilities, both years
-7.6%
2 facilities that filed in 2022 and 2023
Whole inventory
-34.0%
1.8 million lb → 1.2 million lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Century Aluminum Co's total reported releases fell from 1.3 million lb in 2022 to 1.2 million lb in 2023, based on EPA TRI filings.
- Century Aluminum Co's off-site transfers fell from 33.9 thousand lb in 2022 to 65 lb in 2023, based on EPA TRI filings.
- Century Aluminum Co's water releases fell from 154 lb in 2022 to 137 lb in 2023, based on EPA TRI filings.
- Century Aluminum Co's chemicals reported fell from 15 in 2022 to 14 in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Century Aluminum Co from filing to facility
Largest Form R sites under this parent: Century Aluminum of Kentucky; Century Aluminum Sebree LLC; Century Aluminum of South Carolina. Neighbor parents on the disclosure ladder: Ppl Corp; Big Rivers Electric Corp; East Kentucky Power Cooperative Inc; Perdue Farms Inc. Largest disclosed chemicals by pounds: Carbonyl sulfide; Hydrogen fluoride; Naphthalene; Polycyclic aromatic compounds; Cyanide compounds. Heaviest-reporting states in this extract: Kentucky; South Carolina. Industry labels on the parent rollup: Primary Metals. 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: Century Aluminum of Kentucky; Century Aluminum Sebree LLC; Century Aluminum of South Carolina. Neighbor parents on the disclosure ladder: Ppl Corp; Big Rivers Electric Corp; East Kentucky Power Cooperative Inc; Perdue Farms Inc. Largest disclosed chemicals by pounds: Carbonyl sulfide; Hydrogen fluoride; Naphthalene; Polycyclic aromatic compounds; Cyanide compounds. Heaviest-reporting states in this extract: Kentucky; South Carolina. Industry labels on the parent rollup: Primary Metals.
Century Aluminum Co ranks #174 of 4,988 slug-merged TRI parents by disclosed release pounds, mid-to-upper among parents, not a top-25 volume name. Century Aluminum Co files across 2 states, a regional parent portfolio rather than a single-state discloser. Century Aluminum Co's disclosed pounds are spread across 3 facilities, no single site dominates the parent total in this extract.
Parent aggregation for Century Aluminum Co follows facility-reported names. Compare the named neighbors (Ppl Corp; Big Rivers Electric Corp; East Kentucky Power Cooperative Inc) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Century Aluminum Co sits among TRI parents
Century Aluminum Co sits on a disclosure ladder beside Ppl Corp and Big Rivers Electric Corp and East Kentucky Power Cooperative Inc and Perdue Farms Inc. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Ppl Corp · rank #172 · 25.6M lbs
- Big Rivers Electric Corp · rank #173 · 12.8M lbs
Lower disclosed volume
- East Kentucky Power Cooperative Inc · rank #175 · 8.5M lbs
- Perdue Farms Inc · rank #176 · 6.8M lbs
Largest chemicals disclosed by Century Aluminum Co
Carbonyl sulfide; Hydrogen fluoride; Naphthalene; Polycyclic aromatic compounds; Cyanide compounds lead the Form R pound rollup for this parent, including filings such as Century Aluminum of Kentucky. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Carbonyl sulfide | 5.3M lbs |
| Hydrogen fluoride | 2.1M lbs |
| Naphthalene | 696.8K lbs |
| Polycyclic aromatic compounds | 323.6K lbs |
| Cyanide compounds | 105.3K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Kentucky | 2 | 5.9M lbs |
| South Carolina | 1 | 2.7M lbs |
Facilities (3)
| Facility | Releases |
|---|---|
| Century Aluminum of Kentucky Hawesville, KY | 3.0M lbs |
| Century Aluminum Sebree LLC Robards, KY | 2.9M lbs |
| Century Aluminum of South Carolina Goose Creek, SC | 2.7M 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 Century Aluminum Co on total disclosed release pounds (8.6M lbs) and reporting facility count (3). Release-volume peers include The Goodyear Tire & Rubber Co, W R Grace & Co, Chs Inc. Facility-count peers include A-Gas US Holdings Inc, Abb Holdings Inc, Adams Resources & 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.
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 Kentucky, South Carolina; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Century Aluminum Co's TRI parent record
From Century Aluminum Co, open Century Aluminum of Kentucky or compare against Ppl Corp rather than reading rank alone.
- Open the largest Form R site for Century Aluminum Co (Century Aluminum of Kentucky in KY). Largest facility
- Compare against Big Rivers Electric Corp, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Century Aluminum Co sits among all slug-merged TRI parents. All parent companies
Rank and peers (Ppl Corp, Big Rivers Electric Corp) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Century Aluminum Co'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.