Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
GRANT PRIDECO
9475 FM 1227 RD, NAVASOTA, TX, 77868
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 | n-Butyl alcohol | Methyl isobutyl ketone | Chromium | Manganese | Nickel | Total (lbs) |
| 2024 | — | — | 186 | 75 | 124 | 534 |
| 2023 | — | — | 82 | 41 | 8 | 136 |
| 2022 | — | — | 934 | 663 | 155 | 1,752 |
| 2020 | — | — | — | 43 | 7 | 53 |
| 2019 | — | — | — | 220 | 88 | 317 |
| 2018 | — | — | 18 | 19 | 8 | 45 |
| 2017 | 10,449 | — | 412 | 388 | 165 | 11,414 |
| 2016 | — | 5,414 | 144 | 41 | 20 | 5,618 |
▎ 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.