{"data":{"id":"us/40-cfr-147.3009","jurisdiction":"us","citation":"40 CFR 147.3009","heading":"Area of review.","body":"The area of review shall be defined as follows:\n(a) Class II wells. The area of review for Class II permits and area permits shall be defined by a fixed radius as described in § 146.6(b) (1) and (2) of this chapter except that the radius shall be one-half mile.\n(b) Class I and III wells. The area of review for Class I and III wells are well fields which may be either:\n(1) An area defined by a radius two and one-half miles from the well or well field; or\n(2) An area one-quarter mile from the well or well field where the well field production at the times exceeds injection to produce a net withdrawal; or\n(3) A suitable distance, not less than one-quarter mile, proposed by the owner or operator and approved by the Director based upon a mathematical calculation such as that found in § 146.6(a)(2) of this chapter.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER D—WATER PROGRAMS","PART 147—STATE, TRIBAL, AND EPA-ADMINISTERED UNDERGROUND INJECTION CONTROL PROGRAMS","Subpart HHH—Lands of the Navajo, Ute Mountain Ute, and All Other New Mexico Tribes"],"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":"684e32157459bc1282e1dd33f0d15890262b8ddfefd3e513db3865ea3873fda5","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-147.3008","next":"us/40-cfr-147.3010"},"notice":"GroundRules: Original legal text. Not legal advice."}