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 Working with our community to ensure
 a safe and healthy environment.

Stormwater Quality Management and Discharge Control Regulation

The purpose of the Maricopa County Stormwater Quality Management and Discharge Control Regulation is to provide for the health, safety, and general welfare of the citizens of Maricopa County through the prohibition of non-Stormwater discharges to the storm drainage system to the maximum extent practicable as required by federal and state law. This Regulation will also protect waters within Maricopa County by improving the quality of the Stormwater runoff from urbanized areas to the County-owned system by means of the use of best management practices (BMPs) by the County and its citizens.

This Regulation ensures that the County is compliant with its Arizona Pollutant Discharge and Elimination System (AZPDES) permit requirements by establishing methods for controlling the introduction of pollutants into the County’s municipal separate storm sewer system (MS4).

For more information, please e-mail or call (480) 483-4703 x216.

For regulation related comments or questions, please e-mail us at participate@mail.maricopa.gov