Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MARTIN MARIETTA ARIZONA LLC - RIVER RANCH PLANT
5159 N EL MIRAGE RD, LITCHFIELD PARK, AZ, 85340
Parent company: MARTIN MARIETTA MATERIALS INC
Carcinogen
PBT
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.
Full release table
Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.
| All values in pounds (lbs) | ||||||
|---|---|---|---|---|---|---|
| Year | Aluminum (fume or dust) | Manganese | Lead | Mercury | Lead compounds | Total (lbs) |
| 2024 | — | — | 1 | 1 | — | 2 |
| 2023 | — | — | 1 | — | — | 1 |
| 2022 | — | — | 1 | — | — | 1 |
| 2021 | 416 | — | 0 | — | — | 416 |
| 2020 | 314 | — | 1 | 0 | — | 314 |
| 2019 | 149 | — | — | — | — | 149 |
| 2016 | 9 | — | — | — | — | 9 |
| 2015 | 135 | — | 2 | — | — | 137 |
| 2014 | 175 | 60 | 2 | — | — | 237 |
| 2013 | — | — | — | — | 0 | 0 |
▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.