EPA TRI Facility · Nonmetallic Mineral Product
Martin Marietta Arizona LLC - Dobson Plant
Scottsdale, AZ · Parent: Martin Marietta Materials Inc
- Total releases
- 782 lbs
- Chemicals reported
- 4
- Carcinogens
- 1
- Primary pathway
- Air Releases
AIR Form-R mix
Martin Marietta Arizona LLC - Dobson Plant: how the 782 lbs splits
782 lbs across all reported pathways
- Air Releases 782 lbs 100.0%
Martin Marietta Arizona LLC - Dobson Plant's 782 lbs Form-R total is AIR - air releases is 100.0% of the bar. Off-site transfers stay separate from air, water, and land releases. Leading chemical by pounds: Aluminum (fume or dust).
TRACE volume AIR pathway TRACE-CARC
Martin Marietta Arizona LLC - Dobson Plant is an EPA Toxics Release Inventory reporter in Scottsdale, AZ, in the nonmetallic mineral product sector. It reported 0 lbs of releases across 1 chemical in 2023, and 782 lbs in total across its 2019-2023 reporting years. That ranks 14,205 of 25,986 TRI facilities nationwide by cumulative reported pounds, counting each facility over however many years it has filed. In Arizona's 288 reporting TRI sites, pounds #1 is not chemical-count #1. Martin Marietta Arizona LLC - Dobson Plant is pounds #171 and chemical-count #90 at 782 lbs. Freeport-McMoran Miami Inc leads reported pounds (129.3M lbs) at 17 chemicals (chemical-count #10). Freeport-McMoran Morenci Inc leads chemical count at 33 chemicals (36.9M lbs, pounds #4). Pounds reported are not a measure of toxicity or health risk. Nearest other TRI reporters: Dobson Batch Plant #12; General Dynamics Mission Systems; Gold Tech Industries - Aerospace/telecommunications Division; Southwest Distributing Co.. Similar-scale Nonmetallic Mineral Product peers outside Arizona: Green County Redi-Mix; Proform Finishing Products - Atlanta; Ardagh Glass Inc; Mansfield Plumbing Products LLC. Other Martin Marietta Materials Inc sites in this extract: Martin Marietta North Texas Cement LLC; Martin Marietta Magnesia Specialties Woodville; Mission Valley Rock; Martin Marietta Arizona LLC - River Ranch Plant. Largest disclosed chemicals by pounds: Aluminum (fume or dust); Lead; Lead And Lead Compounds; Mercury.
Martin Marietta Arizona LLC - Dobson Plant stamps TRACE volume with a dominant AIR pathway (100.0% air releases) across 4 chemicals · 1 carcinogen-classified. Cumulative Form-R extract: 782 lbs (2019–2023). All figures are self-reported EPCRA §313 estimates, not measured stack emissions or a health-risk score. Scale peers include Green County Redi-Mix and Proform Finishing Products - Atlanta.
Martin Marietta Arizona LLC - Dobson Plant vs. every reporting TRI facility
Cumulative reported release pounds, with this facility marked in the national distribution
782 lbs 45th percentile higher than 45% of 25,986 reporting TRI facilities
Each bar is a $1M-wide band; taller bars hold more reporting TRI facilities. The dashed line and filled bar mark this facility. Hover, focus, or tap a bar for its full count, share, and position.
Source U.S. Environmental Protection Agency, Toxics Release Inventory · 2023 reporting year
Martin Marietta Arizona LLC - Dobson Plant in the Nonmetallic Mineral Product sector extract
Among the 3,265 Nonmetallic Mineral Product facilities in this database, Martin Marietta Arizona LLC - Dobson Plant reports the 657th-largest volume, placing it in the top 20.1% of its sector. Scale peers outside Arizona include Green County Redi-Mix and Proform Finishing Products - Atlanta.
Sector rank uses reported TRI pounds only. Share callouts need ≥1,000 lbs so tiny totals cannot mint a false signal.
Martin Marietta Arizona LLC - Dobson Plant Form-R facts
Compare this facility
See how Martin Marietta Arizona LLC - Dobson Plant stacks up against nearby facilities and the typical reporter.
33% less than the comparison
2.0× more than the comparison
Comparison reflects reported pounds and chemical counts, not toxicity or health risk. Averages cover facilities reporting any release.
How does this facility release toxic chemicals?
How Martin Marietta Arizona LLC - Dobson Plant releases toxic chemicals into the environment. Total: 782 lbs.
Emissions Trend Summary
From 2019 to 2023, total releases decreased by 100% (306 lbs to 0 lbs).
Martin Marietta Arizona LLC - Dobson Plant: annual Form-R pounds
TRACE site · AIR pathway · TRI years 2019–2023
- 2019 0
- 2020 0
- 2021 0
- 2022 0
- 2023 0
What this shows Martin Marietta Arizona LLC - Dobson Plant year-over-year reported totals (decreased by 100% from 2019 to 2023). TRI figures are self-reported estimates and can swing with production, waste handling, and reporting changes, not only with controls. Lead chemical in the extract: Aluminum (fume or dust).
| Year | Total | Chemicals |
|---|---|---|
| 2019 | 306 lbs | 3 |
| 2020 | 256 lbs | 3 |
| 2021 | 219 lbs | 3 |
| 2022 | 0 lbs | 1 |
| 2023 | 0 lbs | 1 |
Chemical Releases
Aggregated across all reporting years (2019–2023). 1 of 4 chemicals are carcinogens. Sorted by total release volume.
| Chemical | Total | Flags |
|---|---|---|
| Aluminum (fume or dust) | 781 lbs | - |
| Lead | 1 lbs | Carcinogen |
| Lead And Lead Compounds | 0 lbs | - |
| Mercury | 0 lbs | - |
Martin Marietta Arizona LLC - Dobson Plant · AIR-pathway site
Nearest TRI Facilities to Martin Marietta Arizona LLC - Dobson Plant
Closest other reporters in Arizona - including Dobson Batch Plant #12, General Dynamics Mission Systems, Gold Tech Industries - Aerospace/telecommunications Division, ordered by distance.
Showing 8 of 287 other reporting facilities in Arizona.
Similar Nonmetallic Mineral Product Facilities
Other Nonmetallic Mineral Product facilities with similar total release volumes (±80%), outside Arizona - e.g. Green County Redi-Mix, Proform Finishing Products - Atlanta, Ardagh Glass Inc.
Other Martin Marietta Materials Inc Facilities
Same-parent TRI sites ranked by reported releases - including Martin Marietta North Texas Cement LLC, Martin Marietta Magnesia Specialties Woodville, Mission Valley Rock.
About TRI Data
Data as of 2023 reporting year. Source: U.S. Environmental Protection Agency (EPA) Toxic Release Inventory.
On this page the largest disclosed chemicals include Aluminum (fume or dust), Lead, Lead And Lead Compounds, Mercury; nearby reporters include Dobson Batch Plant #12. Martin Marietta Arizona LLC - Dobson Plant stamps TRACE volume · AIR pathway · TRACE-CARC carcinogen-lbs on this Form-R extract. Totals are self-reported estimates under EPCRA §313, not measured stack emissions or a health-risk score.
Use and verify this record
This Martin Marietta Arizona LLC - Dobson Plant TRI extract (TRACE · AIR · TRACE-CARC · lead Aluminum (fume or dust)) joins EPA Form-R filings with facility identity - reported pounds, not a health-risk rating.
Martin Marietta Arizona LLC - Dobson Plant totals are self-reported EPCRA §313 estimates for Scottsdale, AZ, latest year 2023. Form-R rows span 2019–2023 (5 years). NAICS 327320 · Nonmetallic Mineral Product. 0.0% of Maricopa TRI pounds in this extract. Nearest ABS peer: Green County Redi-Mix (Δ 1 lbs). Pounds ≠ exposure.
Martin Marietta Arizona LLC - Dobson Plant stamps TRACE volume · AIR pathway · TRACE-CARC · lead Aluminum (fume or dust). PlainEnviro renders this EPA Form-R extract from its pipeline; no figure is typed in by an editor. Corrections: editorial policy.
All federal data sources used on this page
- EPA Toxics Release Inventory (TRI) Basic Data Files - annual self-reported chemical-release filings. epa.gov
- EPA TRI Program reference - how chemicals and reported releases are counted. epa.gov
- EPA Facility Registry Service - facility location and identity. epa.gov
- EPA ECHO - regulatory and compliance context. epa.gov
- EPA Envirofacts - the EPA data warehouse exposing these datasets. epa.gov