Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
NOV RIG SYSTEMS WEST LITTLE YORK
12950 W LITTLE YORK RD, HOUSTON, TX, 77041
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 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 | Methyl ethyl ketone | Xylene (mixed isomers) | Methyl isobutyl ketone | Zinc (fume or dust) | Zinc compounds | Total |
|---|---|---|---|---|---|---|
| 2024 | — | — | — | — | — | 389 |
| 2023 | — | — | — | — | — | 1,175 |
| 2022 | — | — | — | — | — | 307 |
| 2021 | — | — | — | — | — | 330 |
| 2019 | — | — | — | — | — | 649 |
| 2017 | — | — | — | — | — | 0 |
| 2016 | — | — | — | 8 | — | 8 |
| 2014 | — | — | — | 5 | 2,820 | 2,927 |
| 2013 | — | 9,046 | — | — | 178 | 9,224 |
| 2012 | — | 11,583 | — | — | 111 | 11,694 |
| 2011 | — | 25,433 | — | 5 | 95 | 25,533 |
| 2010 | — | 6,388 | — | 5 | — | 6,393 |
| 2009 | — | — | — | 5 | — | 5 |
| 2008 | — | 3,851 | — | 5 | — | 3,856 |
| 2003 | 12,032 | — | — | 250 | — | 12,282 |
| 2002 | 14,906 | — | — | 5,092 | — | 19,998 |
| 1999 | 20,939 | 17,599 | — | — | — | 38,538 |
| 1998 | 38,417 | 28,613 | 14,116 | — | — | 81,146 |
| 1997 | 33,982 | 22,108 | 11,316 | — | — | 67,406 |
| 1996 | 15,145 | 15,000 | — | — | — | 30,145 |
| 1993 | 10,550 | — | — | — | — | 10,550 |
| 1992 | 10,920 | — | — | — | — | 10,920 |