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Water Quality Standards Regulations: Rhode Island

Presented below are water quality standards in effect for Clean Water Act (CWA) purposes for this state.

EPA is posting these standards as a convenience to users and has made a reasonable effort to assure their accuracy. Also, for each document listed under "State Standards in Effect for CWA Purposes", EPA has made a reasonable effort to identify parts of the standards that are disapproved or are otherwise not in effect for CWA purposes.

On this page:

State Standards in Effect for CWA Purposes

  • [See Water Quality Regulations ]
    (Effective February 26, 2020) These regulations establish water quality standards for the State's surface waters.  Please note that some provisions in this document have not been approved by EPA and are therefore not in effect for CWA purposes.  See the cover page for more information.
  • [See Combined Sewer Overflow Policy ]
    This policy contains requirements and treatment technology standards to assure water quality standards are met for waters receiving combined sewer overflows.

Federally Proposed or Promulgated Standards

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