Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
3M (MINNESOTA MINING & MFG CO) - AMES
900 DAYTON AVE, AMES, IA, 50010
Parent company: 3M CO
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 | 4,4'-Methylenedi(phenyl isocyanate) | Zinc compounds | Total (lbs) | |||
| 2024 | — | 31 | 31 | |||
| 2023 | — | 1 | 1 | |||
| 2022 | — | 1 | 1 | |||
| 2021 | — | 1 | 1 | |||
| 1992 | 250 | — | 250 | |||
▎ 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.