Summit Materials LLC
63 facilities · 12 states · 1.8M lbs total releases
According to the EPA Toxics Release Inventory, Summit Materials LLC is the reported parent of 63 Form R facilities across 12 states, disclosing 1.8M lbs of toxic releases. 20 of 155 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Iowa (816.5K lbs). Those TRI figures remain self-reported disclosure pounds for Summit Materials LLC, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Summit Materials LLC: EPA TRI 2023 reporting year
Same facilities, both years
-16.1%
56 facilities that filed in 2022 and 2023
Whole inventory
-16.1%
416.6 thousand lb → 349.5 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 4 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Summit Materials LLC's total reported releases fell from 416.6 thousand lb in 2022 to 349.5 thousand lb in 2023, based on EPA TRI filings.
- Summit Materials LLC's land releases fell from 7.0 thousand lb in 2022 to 1.2 thousand lb in 2023, based on EPA TRI filings.
- Summit Materials LLC's off-site transfers fell from 25.4 thousand lb in 2022 to 18.4 thousand lb in 2023, based on EPA TRI filings.
- Summit Materials LLC's air releases fell from 384.2 thousand lb in 2022 to 329.9 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Summit Materials LLC from filing to facility
Largest Form R sites under this parent: Continental Cement Co; Continental Cement Co LLC; Argos USA - Martinsburg; Argos Newberry Plant. Neighbor parents on the disclosure ladder: Archer Daniels Midland Co; Freeport-McMoran Inc. Largest disclosed chemicals by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Ammonia; Acetaldehyde; Naphthalene; Zinc compounds. Heaviest-reporting states in this extract: Iowa; Missouri; West Virginia. Industry labels on the parent rollup: Nonmetallic Mineral Product; Petroleum. 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: Continental Cement Co; Continental Cement Co LLC; Argos USA - Martinsburg; Argos Newberry Plant. Neighbor parents on the disclosure ladder: Archer Daniels Midland Co; Freeport-McMoran Inc. Largest disclosed chemicals by pounds: Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Ammonia; Acetaldehyde; Naphthalene; Zinc compounds. Heaviest-reporting states in this extract: Iowa; Missouri; West Virginia. Industry labels on the parent rollup: Nonmetallic Mineral Product; Petroleum.
Summit Materials LLC ranks #486 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Summit Materials LLC spans 12 states in this extract, placing it among the broader national TRI parent footprints. Summit Materials LLC's disclosed pounds are spread across 63 facilities, no single site dominates the parent total in this extract.
Parent aggregation for Summit Materials LLC follows facility-reported names. Compare the named neighbors (Archer Daniels Midland Co; Freeport-McMoran Inc) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Summit Materials LLC sits among TRI parents
Summit Materials LLC sits on a disclosure ladder beside Archer Daniels Midland Co and Freeport-McMoran Inc. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Archer Daniels Midland Co · rank #484 · 17.3M lbs
- Freeport-McMoran Inc · rank #485 · 16.4M lbs
Largest chemicals disclosed by Summit Materials LLC
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Ammonia; Acetaldehyde; Naphthalene; Zinc compounds lead the Form R pound rollup for this parent, including filings such as Continental Cement Co. Pound totals, not toxicity-weighted risk.
| Chemical | Disclosed lbs |
|---|---|
| Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | 1.0M lbs |
| Ammonia | 445.7K lbs |
| Acetaldehyde | 94.3K lbs |
| Naphthalene | 50.0K lbs |
| Zinc compounds | 37.3K lbs |
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Iowa | 1 | 816.5K lbs |
| Missouri | 2 | 433.8K lbs |
| West Virginia | 1 | 262.9K lbs |
| Florida | 2 | 256.8K lbs |
| South Carolina | 3 | 63.0K lbs |
| Kansas | 3 | 878 lbs |
| Texas | 3 | 44 lbs |
| Georgia | 24 | 25 lbs |
| Virginia | 2 | 21 lbs |
| North Carolina | 16 | 14 lbs |
| Oklahoma | 4 | 14 lbs |
| Alabama | 2 | 1 lbs |
Facilities (63)
Frequently Asked Questions
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Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Summit Materials LLC on total disclosed release pounds (1.8M lbs) and reporting facility count (63). Release-volume peers include Solar Sources Inc, Halliburton Energy Services Inc, Hexion Holdings Corp. Facility-count peers include Jbs USA Food Co, Koch Inc., Ergon 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 Iowa, Missouri, West Virginia; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Summit Materials LLC's TRI parent record
From Summit Materials LLC, open Continental Cement Co or compare against Archer Daniels Midland Co rather than reading rank alone.
- Open the largest Form R site for Summit Materials LLC (Continental Cement Co in IA). Largest facility
- Compare against Freeport-McMoran Inc, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Summit Materials LLC sits among all slug-merged TRI parents. All parent companies
Rank and peers (Archer Daniels Midland Co, Freeport-McMoran Inc) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Summit Materials 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.