{"data":{"id":"us/40-cfr-191.21","jurisdiction":"us","citation":"40 CFR 191.21","heading":"Applicability.","body":"(a) This subpart applies to:\n(1) Radiation doses received by members of the public as a result of activities subject to subpart B of this part; and\n(2) Radioactive contamination of underground sources of drinking water in the accessible environment as a result of such activities.\n(b) This subpart does not apply to:\n(1) Disposal directly into the oceans or ocean sediments;\n(2) Wastes disposed of before the effective date of this subpart; and\n(3) The characterization, licensing, construction, operation, or closure of any site required to be characterized under section 113(a) of Public Law 97-425, 96 Stat. 2201.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER F—RADIATION PROTECTION PROGRAMS","PART 191—ENVIRONMENTAL RADIATION PROTECTION STANDARDS FOR MANAGEMENT AND DISPOSAL OF SPENT NUCLEAR FUEL, HIGH-LEVEL AND TRANSURANIC RADIOACTIVE WASTES","Subpart C—Environmental Standards for Ground-Water Protection"],"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":"9b95e4825f38e97ecd2ceb89d93738c3aae814f6f7b3b18fb3092e84241e1572","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-191.17","next":"us/40-cfr-191.22"},"notice":"GroundRules: Original legal text. Not legal advice."}