{"data":{"id":"us/40-cfr-table-3-to-subpart-x-of-part-63","jurisdiction":"us","citation":"40 CFR Table 3 to Subpart X of Part 63","heading":"Table 3 to Subpart X of Part 63—Toxic Equivalency Factors","body":"Dioxin/furan congener Toxic equivalency factor\n2,3,7,8-tetrachlorinated dibenzo-p-dioxin 1\n1,2,3,7,8-pentachlorinated dibenzo-p-dioxin 1\n1,2,3,4,7,8-hexachlorinated dibenzo-p-dioxin 0.1\n1,2,3,7,8,9-hexachlorinated dibenzo-p-dioxin 0.1\n1,2,3,6,7,8-hexachlorinated dibenzo-p-dioxin 0.1\n1,2,3,4,6,7,8-heptachlorinated dibenzo-p-dioxin 0.01\noctachlorinated dibenzo-p-dioxin 0.0003\n2,3,7,8-tetrachlorinated dibenzofuran 0.1\n2,3,4,7,8-pentachlorinated dibenzofuran 0.3\n1,2,3,7,8-pentachlorinated dibenzofuran 0.03\n1,2,3,4,7,8-hexachlorinated dibenzofuran 0.1\n1,2,3,6,7,8-hexachlorinated dibenzofuran 0.1\n1,2,3,7,8,9-hexachlorinated dibenzofuran 0.1\n2,3,4,6,7,8-hexachlorinated dibenzofuran 0.1\n1,2,3,4,6,7,8-heptachlorinated dibenzofuran 0.01\n1,2,3,4,7,8,9-heptachlorinated dibenzofuran 0.01\noctachlorinated dibenzofuran 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 X—National Emission Standards For Hazardous Air Pollutants From Secondary Lead Smelting"],"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":"e0a139abbca6b7be9dea2681053a99988b09f8a1560995e2914e070fab510b60","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-table-2-to-subpart-x-of-part-63","next":"us/40-cfr-63.560"},"notice":"GroundRules: Original legal text. Not legal advice."}