Emissions to air

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HP’s emissions to air from our facility operations are relatively small, and we have equipment and processes in place to control those that do occur. In prior years, we reported estimated emissions from our seven largest manufacturing sites for several conventional air quality parameters. We have since concluded that the scope and nature of these reported emissions are not significant from a companywide viewpoint, and we have not included an update in this report. Local reporting to authorities of these and other indicators will continue where required.

	Toxics release inventory

The U.S. Environmental Protection Agency Toxics Release Inventory (TRI) is a mandatory annual report on specified chemicals used in our operations in the United States. HP’s operations, primarily in the manufacture of our imaging and printing products, require the use of several TRI chemicals. Because we have long considered this to be an important measure, we extend TRI reporting criteria to the seven manufacturing sites worldwide that account for the vast majority of HP’s TRI emissions.

Overall, HP’s TRI emissions decreased 3 percent between 2005 and 2006, primarily because of lower use of our largest production solvent, n-methyl pyrrolidone, and reductions in nitric acid and its treatment byproducts, nitrates. Production ramp-up at one of our facilities was responsible for an increase in our use and emissions of xylene.

Disposition by type of TRI material, 2004-20061 [Tonnes]

¹ The substances with global totals greater than 1 tonne are shown. TRI reports are due July 1 each year, so the most recently completed reporting year is 2006.
² 2004 and 2005 data for nitric acid discharged to water are restated (previous table did not account for on-site treatment process).