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 2025 - Spanish Audio

Stormwater Management Plan Virtual Workshop 2024 - Slides Only

Stormwater Management Plan Virtual Workshop 2024 - Spanish Audio

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.

2024 Annual Report

Attachments:

• Current SWMP
• IDDE Summary
• Facilities Inventory

• Routine maintenance schedules and priorities*
  *Click to download the Excel file and open it in Excel.

  • Retrofit Assessments

    • Retrofit Memo

    • Retrofit Scoring (*Excel file)