Stormwater Discharge Permit
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. This permit expires on June 30, 2026.
ADOT MS4 Stormwater Management Plan (SWMP)
Permit Annual Reports
These reports discuss components of the SSWMP implemented by ADOT, proposed changes to the SSWMP, summary of data collected throughout the reporting year, annual expenditures, enforcement actions, inspections, public education programs, and water quality improvements or degradation.
2021 Annual Report
Stormwater Management Plan Annual Report - 2021
2020 - 2015
- 2020 Annual Report
- 2019 Annual Report
- Appendix A: Dry Weather Screening
- Appendix B: Construction Inventory
- Appendix C: PCBMP Inventory
- Appendix D: Erosion Projects
- Appendix E: Facility Inventory
- Appendix F: Sampling Event Data and Lab Reports
- Addendum: 4th Year Renewal Application information
- Attachment 1: MS4 Route Mapping Prioritization Parameters
- Attachment 2: Receiving Waters
- Attachment 3: Current Mapping
- Attachment 4: Current SWMP
- 2018 Annual Report
- 2017 Annual Report
- 2016 Annual Report
- 2015 Annual Report
