Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
REG MASON CITY LLC
4172 19TH ST SW, MASON CITY, IA, 50401
Parent company: CHEVRON CORP
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases 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.
| Year | Methanol | Total |
|---|---|---|
| 2024 | 3,079 | 3,079 |
| 2023 | 3,079 | 3,079 |
| 2022 | 3,079 | 3,079 |
| 2021 | 12,202 | 12,202 |
| 2020 | 12,202 | 12,202 |
| 2019 | 12,202 | 12,202 |
| 2018 | 10,944 | 10,944 |
| 2017 | 10,944 | 10,944 |
| 2016 | 10,944 | 10,944 |
| 2015 | 4,636 | 4,636 |
| 2014 | 2,565 | 2,565 |
| 2013 | 6,120 | 6,120 |
| 2011 | 547 | 547 |
| 2007 | 505 | 505 |