PERI: Toxic 100 Index

National Oilwell Varco

Surface Water releases 2017 (lbs): 173
POTW (sewerage plant) transfers 2017 (lbs): 1
Pounds released post-treatment 2017 (lbs): 173
Total Surface Water and POTW Toxic Hazard 2017: 4,700,161

This company is rank 22 on the Toxic 100 Air list.
This company has information in PERI's Greenhouse database.

Chemicals at facilities displayed below: (display facilities) (display chemicals)
(Click on column headers to re-sort table: current sort is by percent of total company hazard.)
(Links on facility names lead to full TRI reports. Links on cities lead to Mapquest maps. Links on chemical names lead to Scorecard chemical health effects.)

Facility Name	City	State	Chemical	Surface water releases (lbs)	POTW transfers (lbs)	Post-treatment releases (lbs)	Toxic Hazard (quantity x toxicity)	Percent of total company hazard	Split *
GRANT PRIDECO	NAVASOTA	TX	Chromium	5	1	5	2,379,800	50.63%
VALLOUREC DRILLING PRODUCTS USA INC	HOUSTON	TX	Chromium	3	0	3	1,500,000	31.91%
NOV QUALITY TUBING & NOV TUBOSCOPE SHELDON NORTH	HOUSTON	TX	Lead	43	0	43	765,000	16.28%
VALLOUREC DRILLING PRODUCTS USA INC	HOUSTON	TX	Lead	3	0	3	52,920	1.13%
NOV DOWNHOLE CONROE	CONROE	TX	Nickel	9	0	9	810	0.02%
NOV XL SYSTEMS BEAUMONT	BEAUMONT	TX	Nickel	5	0	5	419	0.01%
GRANT PRIDECO	NAVASOTA	TX	Nickel	4	0	4	400	0.01%
GRANT PRIDECO	NAVASOTA	TX	Manganese	46	0	46	323	0.01%
NOV XL SYSTEMS BEAUMONT	BEAUMONT	TX	Manganese	38	0	38	269	0.01%
VALLOUREC DRILLING PRODUCTS USA INC	HOUSTON	TX	Nickel	1	0	1	93	0.00%
VALLOUREC DRILLING PRODUCTS USA INC	HOUSTON	TX	Manganese	11	0	11	79	0.00%
NOV DOWNHOLE CONROE	CONROE	TX	Manganese	7	0	7	48	0.00%

Toxic hazard: Pounds of direct releases to surface water and estimated releases from transfers to Publicly Operated Treatment Works (POTW's) reported in the US Environmental Protection Agency's Toxics Release Inventory for the year 2017, weighted by toxicity of chemicals. Weights are from the EPA's Risk-Screening Environmental Indicators project. For details, see technical notes.

Quantity of toxic surface water releases and POTW transfers: Pounds of toxic chemicals released directly to surface water at each TRI facility or transferred off-site to a POTW, without weighting for toxicity or population.

Quantity of toxic post-treatment releases: Pounds of toxic chemicals released directly to surface water plus released after treatment at POTW's.

* Split: if 50% appears in this column, then the facility's releases have been split among two 50/50% ownership parent companies for their parent company data, although the full pounds and hazard are displayed here.

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