Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NATIONAL OILWELL VARCO/ FLANAGAN IRON WORKS
6740 S 57TH WEST AVE, TULSA, OK, 74131
Parent company: NATIONAL OILWELL VARCO LP
Carcinogen
— 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 | 4,4'-Isopropylidenediphenol | Chromium | Cobalt | Total (lbs) | ||
| 2013 | 132 | 10 | 9 | 151 | ||
| 2012 | 250 | 10 | — | 260 | ||
| 2011 | 250 | — | — | 250 | ||
| 2010 | 250 | — | — | 250 | ||
| 2009 | 250 | — | — | 250 | ||
| 2008 | 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.