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. 2021 Aug 27;18(17):9055. doi: 10.3390/ijerph18179055

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Calculated Lead Index—see the Methods section for full details on the model inputs. The ZIP codes with the highest values are labeled (19121, 19132, 19133, 19134, 19140, 19141, 19143, 19144).