Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MARATHON PETROLEUM CO - WELLSVILLE OH ASP TERMINAL
102 21ST ST, WELLSVILLE, OH, 43968
Parent company: MARATHON PETROLEUM CORP
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 | n-Hexane | Hydrogen sulfide | Toluene | Xylene (mixed isomers) | Benzene | Total (lbs) |
| 2024 | 5 | — | 6 | 15 | — | 41 |
| 2023 | 620 | — | 4 | 18 | 53 | 795 |
| 2022 | 1,100 | — | 6 | 29 | 96 | 1,412 |
| 2019 | 470 | — | — | 28 | 40 | 619 |
| 2018 | 410 | — | — | 15 | 34 | 525 |
| 2017 | 370 | — | — | 11 | 32 | 473 |
| 2016 | 470 | — | — | 13 | 40 | 599 |
| 2015 | 890 | — | — | 659 | 74 | 1,746 |
| 2014 | 13,100 | 1,750 | 1,430 | 451 | 338 | 17,239 |
| 2013 | 630 | 82 | 67 | 20 | 15 | 822 |
| 2012 | — | — | — | — | — | 1 |
▎ 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.