{"data":{"id":"us/40-cfr-table-10-to-subpart-u-of-part-63","jurisdiction":"us","citation":"40 CFR Table 10 to Subpart U of Part 63","heading":"Table 10 to Subpart U of Part 63—Toxic Equivalency Factors","body":"Dioxin and Furan Congener Toxic equivalency factor\n1,2,3,7,8-pentachlorodibenzo-p-dioxin 1\n1,2,3,4,7,8-hexachlorodibenzo-p-dioxin 0.1\n1,2,3,7,8,9-hexachlorodibenzo-p-dioxin 0.1\n1,2,3,6,7,8-hexachlorodibenzo-p-dioxin 0.1\n1,2,3,4,6,7,8-heptachlorodibenzo-p-dioxin 0.01\noctachlorodibenzo-p-dioxin 0.0003\n2,3,7,8-tetrachlorodibenzofuran 0.1\n2,3,4,7,8-pentachlorodibenzofuran 0.3\n1,2,3,7,8-pentachlorodibenzofuran 0.03\n1,2,3,4,7,8-hexachlorodibenzofuran 0.1\n1,2,3,6,7,8-hexachlorodibenzofuran 0.1\n1,2,3,7,8,9-hexachlorodibenzofuran 0.1\n2,3,4,6,7,8-hexachlorodibenzofuran 0.1\n1,2,3,4,6,7,8-heptachlorodibenzofuran 0.01\n1,2,3,4,7,8,9-heptachlorodibenzofuran 0.01\nOctachlorodibenzofuran 0.0003","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart U—National Emission Standards for Hazardous Air Pollutant Emissions: Group I Polymers and Resins"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"38476d7ee8c19688381255d0c077fb09fe5644f10e64e43c8491224460f5e62b","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-9-to-subpart-u-of-part-63","next":"us/40-cfr-63.520"},"notice":"GroundRules: Original legal text. Not legal advice."}