SUBPART D—Federally Promulgated Water Quality Standards (§131.31 to §131.42)
- 131.31—Arizona.
- 131.33—Idaho.
- 131.34—Kansas.
- 131.35—Colville Confederated Tribes Indian Reservation.
- 131.36—Toxics criteria for those states not complying with Clean Water Act section 303(c)(2)(B).
- 131.37—California.
- 131.38—Establishment of numeric criteria for priority toxic pollutants for the State of California.
- 131.40—Puerto Rico
- 131.41—Bacteriological criteria for those states not complying with Clean Water Act section 303(i)(1)(A).
- 131.42—Antidegradation Implementation Methods for the Commonwealth of Puerto Rico.