Polypore International LP
2 facilities · 2 states · 1.9M lbs total releases
According to the EPA Toxics Release Inventory, Polypore International LP is the reported parent of 2 Form R facilities across 2 states, disclosing 1.9M lbs of toxic releases. 1 of 3 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Kentucky (1.8M lbs). Those TRI figures remain self-reported disclosure pounds for Polypore International LP, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Polypore International LP: EPA TRI 2023 reporting year
Same facilities, both years
-36.5%
1 facilities that filed in 2022 and 2023
Whole inventory
-36.5%
407.6 thousand lb → 258.8 thousand lb, every facility that filed
- Polypore International LP's total reported releases fell from 407.6 thousand lb in 2022 to 258.8 thousand lb in 2023, based on EPA TRI filings.
- Polypore International LP's air releases fell from 407.6 thousand lb in 2022 to 258.8 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Polypore International LP from filing to facility
Largest Form R sites under this parent: Daramic LLC; Daramic LLC. Neighbor parents on the disclosure ladder: Ppl Corp; Big Rivers Electric Corp. Largest disclosed chemicals by pounds: n-Hexane; Cyclohexane; Trichloroethylene. Heaviest-reporting states in this extract: Kentucky; Indiana. Industry labels on the parent rollup: Plastics and Rubber. 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: Daramic LLC; Daramic LLC. Neighbor parents on the disclosure ladder: Ppl Corp; Big Rivers Electric Corp. Largest disclosed chemicals by pounds: n-Hexane; Cyclohexane; Trichloroethylene. Heaviest-reporting states in this extract: Kentucky; Indiana. Industry labels on the parent rollup: Plastics and Rubber.
Polypore International LP ranks #481 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Polypore International LP files across 2 states, a regional parent portfolio rather than a single-state discloser. Releases are facility-concentrated: Daramic LLC accounts for most of Polypore International LP's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Polypore International LP follows facility-reported names. Compare the named neighbors (Ppl Corp; Big Rivers Electric Corp) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Polypore International LP sits among TRI parents
Polypore International LP sits on a disclosure ladder beside Ppl Corp and Big Rivers Electric Corp. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Ppl Corp · rank #479 · 25.6M lbs
- Big Rivers Electric Corp · rank #480 · 12.8M lbs
Largest chemicals disclosed by Polypore International LP
n-Hexane; Cyclohexane; Trichloroethylene lead the Form R pound rollup for this parent, including filings such as Daramic LLC. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| n-Hexane | 1.3M lbs |
| Cyclohexane | 425.2K lbs |
| Trichloroethylene | 101.4K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Kentucky | 1 | 1.8M lbs |
| Indiana | 1 | 101.4K lbs |
Facilities (2)
| Facility | Releases |
|---|---|
| Daramic LLC Owensboro, KY | 1.8M lbs |
| Daramic LLC Corydon, IN | 101.4K lbs |
Frequently Asked Questions
How much pollution does Polypore International LP release?
How many facilities does Polypore International LP operate?
What industries and chemicals show up for Polypore International LP?
Does Polypore International LP release carcinogens?
Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Polypore International LP on total disclosed release pounds (1.9M lbs) and reporting facility count (2). Release-volume peers include Halliburton Energy Services Inc, Ellwood Group Inc, Summit Materials 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.
About This Data
EPA TRI parent totals cover all media. This extract's heaviest states for the parent are Kentucky, Indiana; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Polypore International LP's TRI parent record
From Polypore International LP, open Daramic LLC or compare against Ppl Corp rather than reading rank alone.
- Open the largest Form R site for Polypore International LP (Daramic LLC 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 Polypore International LP 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
Polypore International LP'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.