Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
NOV HYDRA RIG DUNCAN
1200 E HWY 7, DUNCAN, OK, 73533
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 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 | Lead | Ethylene glycol | Total |
|---|---|---|---|
| 2017 | — | 0 | 0 |
| 2016 | — | 0 | 0 |
| 2011 | 0 | — | 0 |