Puerto Rico

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Federal Regulations 40 CFR 131.42: (Effective January 11, 2008) Federal Regulations establishing methods to implement Puerto Rico's antidegradation policy.
Federal Regulations, 40 CFR 131.41: (Effective December 16, 2004) Federal regulations establishing bacteria criteria for coastal and Great Lakes waters. This regulation is also known as the Beach Rule.
Criteria Withdrawal: On October 29, 2004, EPA withdrew certain federal WQ criteria for Alaska, Arkansas, and Puerto Rico.
Federal Regulations 40 CFR 131.40: (Effective March 26, 2004) Establishes a primary contact recreation designated use and associated water quality criteria for 6 waterbodies and an area of coastal waters known as the "coastal ring."
Puerto Rico Water Quality Standards Regulation (PDF) (432 K): (Effective June 26, 2003) Classifications, designated uses, quality criteria and other rules and regulations applicable to the waters of the Commonwealth of Puerto Rico.
Federal Regulations, 40 CFR 131.36: (Effective April 12, 2000) Toxics criteria for those states not complying with Clean Water Act section 303(c)(2)(B). This federal regulation establishes water quality criteria for certain toxic pollutants. The regulation is also known as the National Toxics Rule.