The following two pie charts show: 1) the TRI-covered industry sectors that reported the largest releases of dioxin and dioxin-like compounds in grams, compared to 2) the industry sectors that reported the greatest releases of grams in toxicity equivalents (grams-TEQ). Note that only data from those TRI reports that included the congener detail for calculating grams-TEQ are included in these charts.

Note: Percentages do not sum to 100% due to rounding.

• Various industry sectors may dispose of or otherwise release very different mixes of dioxin congeners.
• The chemical manufacturing industry accounted for 61% and the primary metals sector for 27% of total grams of dioxins released.
• However, in terms of toxicity equivalents the primary metals sector accounted for 70% and the chemical manufacturing sector for 12% of the total grams-TEQ.

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This page was published in January 2021 and uses the 2019 TRI National Analysis dataset made public in TRI Explorer in October 2020.

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