Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NATIONAL SEMICONDUCTOR CORP
7 COMMERCE DR, DANBURY, CT, 06810
Parent company: NA
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 | Sodium sulfate (solution) | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Xylene (mixed isomers) | Freon 113 (CFC-113) | Sodium hydroxide (solution) | Total (lbs) |
| 1989 | — | 220 | 14,371 | 12,200 | — | 33,145 |
| 1988 | — | 11,250 | 7,850 | 9,800 | — | 29,400 |
| 1987 | 540,000 | 18,250 | — | — | 21,000 | 588,050 |
▎ 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.