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Regulation

Regulation 314 CMR 4: The Massachusetts Surface Water Quality Standards

These regulations implement provisions of the federal Clean Water Act, which protects the nation's waters. The Surface Water Quality Standards designate the most sensitive uses of Massachusetts waters and provide criteria for evaluating water quality to support those uses.

Contact for 314 CMR 4: The Massachusetts Surface Water Quality Standards

314 CMR 4.00 Contact Information

Table of Contents

Current Regulations

These regulations, 314 CMR 4.00, became effective as of November 12, 2021. Federal regulations require the US Environmental Protection Agency (EPA) to approve 314 CMR 4.00 for the revisions to become federally enforceable.

Software

Software to derive freshwater aluminum and copper criteria: Aluminum Criteria Calculator, V. 2.0 and Copper Biotic Ligand Model, V. 2.2.3.

Previous Regulations

These regulations, 314 CMR 4.00, became effective as of December 6, 2013.

This is an unofficial version of Commonwealth regulations and is posted here for the convenience of the public. It is not an official statement of the regulations.

Proposed Amendments & Public Comment

There are no proposed regulations out for public comment at this time.

Contact for 314 CMR 4: The Massachusetts Surface Water Quality Standards

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