Stepan Co
7 facilities · 5 states · 2.7M lbs total releases
According to the EPA Toxics Release Inventory, Stepan Co is the reported parent of 7 Form R facilities across 5 states, disclosing 2.7M lbs of toxic releases. 8 of 49 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Illinois (2.6M lbs). Those TRI figures remain self-reported disclosure pounds for Stepan Co, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Stepan Co: EPA TRI 2023 reporting year
Same facilities, both years
-22.3%
7 facilities that filed in 2022 and 2023
Whole inventory
-22.3%
310.8 thousand lb → 241.4 thousand lb, every facility that filed
- Stepan Co's total reported releases fell from 310.8 thousand lb in 2022 to 241.4 thousand lb in 2023, based on EPA TRI filings.
- Stepan Co's off-site transfers rose from 6.8 thousand lb in 2022 to 16.9 thousand lb in 2023, based on EPA TRI filings.
- Stepan Co's water releases fell from 62.7 thousand lb in 2022 to 20.6 thousand lb in 2023, based on EPA TRI filings.
- Stepan Co's air releases fell from 241.3 thousand lb in 2022 to 203.9 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Stepan Co from filing to facility
Largest Form R sites under this parent: Stepan Co Millsdale Road; Stepan Co; Stepan Co; Stepan Co Maywood. Neighbor parents on the disclosure ladder: Wieland Holdings Inc; Archer Daniels Midland Co. Largest disclosed chemicals by pounds: Methanol; Phthalic anhydride; Maleic anhydride; Nitrate compounds (water dissociable; reportable only when in aqueous solution); 1,4-Dioxane. Heaviest-reporting states in this extract: Illinois; North Carolina; Georgia. Industry labels on the parent rollup: Chemicals. 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: Stepan Co Millsdale Road; Stepan Co; Stepan Co; Stepan Co Maywood. Neighbor parents on the disclosure ladder: Wieland Holdings Inc; Archer Daniels Midland Co. Largest disclosed chemicals by pounds: Methanol; Phthalic anhydride; Maleic anhydride; Nitrate compounds (water dissociable; reportable only when in aqueous solution); 1,4-Dioxane. Heaviest-reporting states in this extract: Illinois; North Carolina; Georgia. Industry labels on the parent rollup: Chemicals.
Stepan Co ranks #388 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Stepan Co files across 5 states, a regional parent portfolio rather than a single-state discloser. Releases are facility-concentrated: Stepan Co Millsdale Road accounts for most of Stepan Co's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Stepan Co follows facility-reported names. Compare the named neighbors (Wieland Holdings Inc; Archer Daniels Midland Co) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Stepan Co sits among TRI parents
Stepan Co sits on a disclosure ladder beside Wieland Holdings Inc and Archer Daniels Midland Co. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Wieland Holdings Inc · rank #386 · 30.1M lbs
- Archer Daniels Midland Co · rank #387 · 26.9M lbs
Largest chemicals disclosed by Stepan Co
Methanol; Phthalic anhydride; Maleic anhydride; Nitrate compounds (water dissociable; reportable only when in aqueous solution); 1,4-Dioxane lead the Form R pound rollup for this parent, including filings such as Stepan Co Millsdale Road. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Methanol | 1.3M lbs |
| Phthalic anhydride | 411.1K lbs |
| Maleic anhydride | 232.7K lbs |
| Nitrate compounds (water dissociable; reportable only when in aqueous solution) | 231.3K lbs |
| 1,4-Dioxane | 117.4K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Illinois | 1 | 2.6M lbs |
| North Carolina | 1 | 96.5K lbs |
| Georgia | 2 | 28.6K lbs |
| New Jersey | 2 | 5.8K lbs |
| California | 1 | 2.9K lbs |
Facilities (7)
| Facility | Releases |
|---|---|
| Stepan Co Millsdale Road Elwood, IL | 2.6M lbs |
| Stepan Co Wilmington, NC | 96.5K lbs |
| Stepan Co Winder, GA | 26.4K lbs |
| Stepan Co Maywood Maywood, NJ | 4.0K lbs |
| Stepan Co Anaheim, CA | 2.9K lbs |
| Stepan Co Columbus, GA | 2.3K lbs |
| Stepan Co - Fieldsboro Plant Bordentown, NJ | 1.9K lbs |
Frequently Asked Questions
How much pollution does Stepan Co release?
How many facilities does Stepan Co operate?
What industries and chemicals show up for Stepan Co?
Does Stepan Co release carcinogens?
Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Stepan Co on total disclosed release pounds (2.7M lbs) and reporting facility count (7). Release-volume peers include Corteva Inc, Nexeo Solutions Holdings LLC, Bwx Technologies 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 Illinois, North Carolina, Georgia; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Stepan Co's TRI parent record
From Stepan Co, open Stepan Co Millsdale Road or compare against Wieland Holdings Inc rather than reading rank alone.
- Open the largest Form R site for Stepan Co (Stepan Co Millsdale Road in IL). Largest facility
- Compare against Archer Daniels Midland Co, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Stepan Co sits among all slug-merged TRI parents. All parent companies
Rank and peers (Wieland Holdings Inc, Archer Daniels Midland Co) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Stepan 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.