Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NOV QUALITY TUBING
10303 SHELDON RD - 10222 SHELDON ROAD, HOUSTON, TX, 77049
Parent company: NATIONAL OILWELL VARCO LP
Carcinogen
PBT
— 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 | Methyl isobutyl ketone | Toluene | Ethylene glycol | n-Butyl alcohol | Methanol | Total (lbs) |
| 2024 | 851 | — | — | — | 4,142 | 4,995 |
| 2023 | 34,050 | 37,017 | — | 4,387 | — | 77,936 |
| 2022 | 490,832 | — | — | — | — | 491,177 |
| 2021 | — | — | — | — | — | 213 |
| 2020 | — | — | — | — | — | 1 |
| 2019 | — | 250 | — | — | — | 762 |
| 2018 | — | — | — | — | — | 4 |
| 2017 | — | — | — | — | — | 42 |
| 2016 | — | 629 | — | — | — | 630 |
| 2003 | — | — | 750 | — | — | 750 |
| 2002 | — | — | 15,818 | — | — | 15,818 |
▎ 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.