Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NOV RIG SYSTEMS SUGAR LAND
500 INDUSTRIAL BLVD, SUGAR LAND, TX, 77478
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 | Xylene (mixed isomers) | Propylene | Zinc compounds | Manganese | Copper | Total (lbs) |
| 2016 | — | — | — | 5 | 1 | 6 |
| 2014 | 7,278 | — | — | — | — | 7,278 |
| 2013 | 6,236 | — | — | — | — | 6,236 |
| 2012 | 2,220 | — | — | — | — | 2,220 |
| 2011 | — | — | 31 | — | — | 31 |
| 2009 | 8,180 | — | — | — | — | 8,180 |
| 2008 | 11,010 | 10,900 | — | — | — | 21,910 |
| 2007 | 12,371 | — | — | — | — | 12,371 |
▎ 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.