U.S. Code
Regulations
Constitution
Sort by Rank
Titles Ascending
Titles Descending
10 per page
25 Result/page
50 Result/page
x
Search
Search guide
U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
All Titles
Title 40
Chapter I
Part 191
Subpart C - Subpart C—Environmental Standards for Ground-Water Protection
§ 191.21 - Applicability.
§ 191.22 - Definitions.
§ 191.23 - General provisions.
§ 191.24 - Disposal standards.
§ 191.25 - Compliance with other Federal regulations.
§ 191.26 - Alternative provisions.
§ 191.27 - Effective date.
Download the GovRegs app!
