“Bottom–up” study of in-use nickel stocks in New Haven, CT

We have carried out an assessment of the in-use stock of nickel in New Haven, CT, by “bottom–up” methods. To our knowledge, this is only the second characterization of in-use nickel stock in any locale and at any epoch. We find that the City of New Haven contains about 321 Mg (1 Mg = 1 metric tonnes = 1000 kg) of nickel, primarily in the form of nickel-containing alloys. For every resident of New Haven, there is approximately 2.6 kg of nickel stock in use. The principal uses accounting for these totals are identified and quantified in this paper.