Summary of U.S. Background Dioxin and Furan TEQ Environmental Levels

Media No. Samples X TEQ

Urban soil 101 20 ppt

Rural soil 180 4 ppt

Urban air 109 0.10 pg/m3

Rural air 9 0.04 pg/m3

Water 214 0.0056 ppq

Sediment 11 5.3 ppt

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