Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
NOV DOWNHOLE CONROE
500 CONROE PARK W DR, CONROE, TX, 77303
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 | Nickel | Chromium | Copper | Manganese | Silver | Total |
|---|---|---|---|---|---|---|
| 2024 | 473 | — | 171 | 154 | 404 | 1,203 |
| 2023 | 1,017 | 109 | — | — | — | 1,128 |
| 2022 | 1,299 | — | — | — | — | 1,299 |
| 2021 | 2,090 | 56 | — | — | — | 2,146 |
| 2020 | 5,540 | 625 | 293 | 4 | — | 6,462 |
| 2019 | 20 | 20 | — | 40 | — | 80 |
| 2018 | 11 | 1 | — | 156 | — | 168 |
| 2017 | 9 | — | — | 44 | — | 53 |
| 2016 | 19 | — | — | 13 | — | 32 |