ɪn tˈuː θˈaʊzənd tˈuː, ˌiːpˌiːˈeɪ ɹˈiːdʒən fˈoːɹ ˌɪndᵻpˈɛndəntli pɚfˈɔːɹmd ɐn ɐnˈæləsˌɪs ʌv ˈʌðɚ dˈeɪɾə tə dɪvˈɛləp ɐ kˈaʊntibaɪkˈaʊnti ˈɛɹ tˈɑːksɪks ɹˈɛlətˌɪv ɹˈɪsk skɹˈiːnɪŋ ɐnˈæləsˌɪs, wˌɪtʃ ˈɪndᵻkˌeɪɾᵻd ðæt dʒˈɛfɚsən kˈaʊnti hæd ðə hˈaɪɪst ɹˈɪsk ʌvðə sˈaʊθiːst ɹˈiːdʒən.
In 2002, EPA Region 4 independently performed an analysis of other data to develop a county-by-county Air Toxics Relative Risk Screening Analysis, which indicated that Jefferson County had the highest risk of the Southeast region.