Martin Marietta Materials Inc
106 facilities · 7 states · 1.4M lbs total releases
According to the EPA Toxics Release Inventory, Martin Marietta Materials Inc is the reported parent of 106 Form R facilities across 7 states, disclosing 1.4M lbs of toxic releases. 4 of 192 reported chemicals carry a carcinogen classification in the TRI extract. The heaviest-reporting state by release volume is Texas (1.0M lbs). Those TRI figures remain self-reported disclosure pounds for Martin Marietta Materials Inc, including carcinogen-flagged substances, not a measured public-health risk score.
Release-over-release change
What changed for Martin Marietta Materials Inc: EPA TRI 2023 reporting year
Same facilities, both years
-21.0%
71 facilities that filed in 2022 and 2023
Whole inventory
-21.0%
390.2 thousand lb → 308.2 thousand lb, every facility that filed
Between the two reporting years, 8 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Martin Marietta Materials Inc's total reported releases fell from 390.2 thousand lb in 2022 to 308.2 thousand lb in 2023, based on EPA TRI filings.
- Martin Marietta Materials Inc's land releases fell from 183.4 thousand lb in 2022 to 108.3 thousand lb in 2023, based on EPA TRI filings.
- Martin Marietta Materials Inc's chemicals reported rose from 15 in 2022 to 17 in 2023, based on EPA TRI filings.
- Martin Marietta Materials Inc's air releases fell from 206.5 thousand lb in 2022 to 199.6 thousand lb in 2023, based on EPA TRI filings.
TRI parent disclosure trail
Read Martin Marietta Materials Inc from filing to facility
Largest Form R sites under this parent: Martin Marietta North Texas Cement LLC; Martin Marietta Magnesia Specialties Woodville; Mission Valley Rock; Martin Marietta Arizona LLC - River Ranch Plant. Neighbor parents on the disclosure ladder: Targa Resources Corp; Ineos US I Inc. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese And Manganese Compounds; Zinc compounds; Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region). Heaviest-reporting states in this extract: Texas; Ohio; Arizona. 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.
Largest Form R sites under this parent: Martin Marietta North Texas Cement LLC; Martin Marietta Magnesia Specialties Woodville; Mission Valley Rock; Martin Marietta Arizona LLC - River Ranch Plant. Neighbor parents on the disclosure ladder: Targa Resources Corp; Ineos US I Inc. Largest disclosed chemicals by pounds: Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese And Manganese Compounds; Zinc compounds; Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region). Heaviest-reporting states in this extract: Texas; Ohio; Arizona. Industry labels on the parent rollup: Nonmetallic Mineral Product; Petroleum.
Martin Marietta Materials Inc ranks #537 of 4,988 slug-merged TRI parents, a smaller disclosed-volume parent relative to the national Form R parent set. Martin Marietta Materials Inc spans 7 states in this extract, placing it among the broader national TRI parent footprints. Releases are facility-concentrated: Martin Marietta North Texas Cement LLC accounts for most of Martin Marietta Materials Inc's disclosed pounds, so peer comparisons should weight that site, not an even portfolio average.
Parent aggregation for Martin Marietta Materials Inc follows facility-reported names. Compare the named neighbors (Targa Resources Corp; Ineos US I Inc) before treating rank as a hazard score; TRI stays self-reported and unweighted by toxicity.
Where Martin Marietta Materials Inc sits among TRI parents
Martin Marietta Materials Inc sits on a disclosure ladder beside Targa Resources Corp and Ineos US I Inc. Open those parents for a different facility count, state span, and chemical mix.
Higher disclosed volume
- Targa Resources Corp · rank #535 · 105.5M lbs
- Ineos US I Inc · rank #536 · 94.2M lbs
Largest chemicals disclosed by Martin Marietta Materials Inc
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size); Manganese And Manganese Compounds; Zinc compounds; Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) lead the Form R pound rollup for this parent, including filings such as Martin Marietta North Texas Cement LLC. Pound totals, not toxicity-weighted risk.
Where does this company operate?
| State | Facilities | Total Releases |
|---|---|---|
| Texas | 71 | 1.0M lbs |
| Ohio | 1 | 408.8K lbs |
| Arizona | 10 | 2.4K lbs |
| California | 6 | 1.2K lbs |
| Colorado | 10 | 273 lbs |
| Arkansas | 6 | 0 lbs |
| Louisiana | 2 | 0 lbs |
Facilities (106)
Frequently Asked Questions
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Compare beyond the release ladder
Nationwide peers by disclosed pounds & facility count
Cross-portfolio TRI parents nearest Martin Marietta Materials Inc on total disclosed release pounds (1.4M lbs) and reporting facility count (106). Release-volume peers include Lesaffre International, Newmarket Corp, Collins Pine Co. Facility-count peers include Cargill Inc, Tyson Foods Inc, Marathon Petroleum Corp. 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 Texas, Ohio, Arizona; facility-reported names can vary across subsidiaries.
Source: U.S. Environmental Protection Agency, TRI Basic Data Files
What to do with Martin Marietta Materials Inc's TRI parent record
From Martin Marietta Materials Inc, open Martin Marietta North Texas Cement LLC or compare against Targa Resources Corp rather than reading rank alone.
- Open the largest Form R site for Martin Marietta Materials Inc (Martin Marietta North Texas Cement LLC in TX). Largest facility
- Compare against Ineos US I Inc, the next-higher disclosed-volume parent. Higher-volume parent
- Browse the full parent release ranking to see where Martin Marietta Materials Inc sits among all slug-merged TRI parents. All parent companies
Rank and peers (Targa Resources Corp, Ineos US I Inc) are disclosure volume only, not toxicity-weighted risk or enforcement status.
Use and verify this record
Martin Marietta Materials Inc'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.