Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
U.S. NATL PARK SERVICE - GRAND CANYON NATIONAL PARK
1575 SHUTTLE BUS RD, GRAND CANYON, AZ, 86023
Parent company: NA
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 | Chlorine | Mixture | Lead | Lead And Lead Compounds | Total (lbs) | |
| 2024 | 13,800 | — | 133 | — | 13,933 | |
| 2023 | 10,350 | — | 296 | — | 10,646 | |
| 2022 | 12,610 | — | 395 | — | 13,005 | |
| 2021 | 10,810 | — | 138 | — | 10,948 | |
| 2020 | 21,750 | — | 162 | — | 21,912 | |
| 2019 | — | 20,670 | — | 483 | 21,153 | |
| 2018 | — | — | 333 | — | 333 | |
| 2017 | — | — | 490 | — | 490 | |
| 2012 | — | — | 111 | — | 111 | |
| 2010 | — | — | 135 | — | 135 | |
| 2009 | — | — | 442 | — | 442 | |
| 2008 | — | — | 589 | — | 589 | |
| 2007 | — | — | 950 | — | 950 | |
| 2006 | — | — | 922 | — | 922 | |
| 2005 | — | — | 344 | — | 344 | |
| 2004 | — | — | 523 | — | 523 | |
| 2003 | — | — | 576 | — | 576 | |
▎ 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.