Stormwater Discharge Permit

Stormwater Discharge Permit

Stormwater Management Plan Virtual Workshop

View our presentations to learn how ADOT works to protect water quality through the implementation of the Stormwater Management Plan, also called the “SWMP”.

Stormwater Management Plan Virtual Workshop 2023 - Video


For more information, please review the 2022 video below for essential information about why ADOT has a SWMP and how it works.

Stormwater Management Plan Virtual Workshop 2022 - Video


Stormwater Management Plan Virtual Workshop 2022 - Slides Only


Stormwater Management Plan (SWMP)

The SWMP document lays out the program that ADOT has developed to comply with the MS4 Permit requirements.

ADOT MS4 Stormwater Management Plan (SWMP)

Questions and/or comments on the plan can be submitted to:

  • [email protected]
  • ADOT Water Resources, Attn: SWMP Comments, 205 S. 17th Ave. Phoenix AZ 85007


MS4 Permit

The Arizona Department of Environmental Quality issued the ADOT Municipal Separate Storm Sewer System (MS4 Permit) on June 24, 2021, with an effective date of July 1, 2021. ADEQ modifications to the permit became effective on May 13, 2022, and January 24, 2023. This permit expires on June 30, 2026.


Permit Annual Reports

These reports summarize components of the SWMP implemented by ADOT, data collected throughout the reporting year, annual expenditures, enforcement actions, inspections, public education programs, and water quality improvements or degradation.


2023 Annual Report