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§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).
§131.38 Establishment of Numeric Criteria for Priority Toxic Pollutants for the State of California.
§131.42 Antidegradation Implementation Methods for the Commonwealth of Puerto Rico.
§131.45 Revision of certain Federal water quality criteria applicable to Washington.