CFR›Title 18›Chapter III›Part 440 ContainsSections 440.1–440.4CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 PART 440—HIGH VOLUME HYDRAULIC FRACTURING Sections 440.1 § 440.1 Purpose, authority, and relationship to other requirements. 440.2 § 440.2 Definitions. 440.3 § 440.3 High volume hydraulic fracturing (HVHF). 440.4 § 440.4 Wastewater from high volume hydraulic fracturing and related activities. AuthorityDelaware River Basin Compact (75 Stat. 688).Source86 FR 20630, Apr. 21, 2021, unless otherwise noted. Previous 430 Part 430—Ground Water Protection Area: Pennsylvania