Watershed Management

APDES Permit

Our municipal separate storm sewer system (MS4) discharges stormwater into more than 30 waterways and wetlands within the Municipality of Anchorage (Municipality) and in State of Alaska rights-of-way owned or operated by the Alaska Department of Transportation and Public Facilities (DOT&PF). The National Pollutant Discharge Elimination System (NPDES) Program originated under section 402 of the Clean Water Act (CWA, 33 USC §1251), which requires that pollutant discharges to surface water be authorized by permit. Together, the Municipality and the DOT&PF are authorized to do so through an Authorization to Discharge under the National Pollutant Discharge Elimination System. This authorization, Alaska Pollutant Discharge Elimination System (APDES) Permit No. AKS 05255-8, is effective from August 1, 2015 to July 31, 2020. The Term III APDES permit required an update to the Quality Assurance Plan (QAP).

The APDES Permit also allows discharge of certain non-stormwater flows, as well as stormwater discharge associated with industrial activity and construction. It outlines compliance responsibilities, limitations, and the requirement of a Stormwater Management Program. The permit incorporates a schedule for compliance, and outlines strict monitoring, record keeping, and reporting requirements. Civil, administrative, and even criminal penalties can apply if the conditions of the permit are not met.

2017 Annual Meeting

The 2017 APDES Annual Meeting will be held on Wednesday March 29th from 9:15 AM to 1:30 PM at the BP Energy Center. Reminders will be sent out by the begining of March to people who attended last year and other interested  parties. This year the format for the meeting will be an open house and will include poster display session with multiple breakout discussions on permit related topics. An agenda for the meeting will be posted on this website a couple of weeks prior to the meeting. If you would like more information on the 2017 Annual Meeting, please contact us at 907-343-8135.


2016 Annual Report

Read our 2016 APDES Annual Report for more detailed information about the permit and actions taken to meet permit requirements. The 2016 Annual Report was submitted to the Alaska Department of Conservation on February 15th, 2017.  Last year's annual report can be found HERE.


2016 APDES Annual Report 500 KB
2016 APDES Annual Report Certification Documents 2 MB


App A1 2016  Storm Water Management Program Update 400 KB
App A2a 2016 ADOT MS4 Summary 119 KB
App A2b 2016 ARDSA Summary 26 KB
App A2c 2016 CBERRRSA MS4 Summary 3 MB
App A2d 2016 GSA MS4 Summary 71 KB
App B1 2016 ADOT Construction Projects Reviewed and Approved 74 KB
App C1 2016 LID Monitoring Memo 6 MB
App C2 Green Infrastructure & LID Implementation Strategy Update 200 KB
App D1 Anchorage Industrial and Commercial Facilities Site Inventory and Map 600 KB
App D2 2016 Snow Disposal Site Inventory 254 KB
App E1a ADOT Maintenance SOPs 2016 Update 579 KB
App E1b ARDSA SOPs 2016 Update 350 KB
App E1c CBERRRSA SOP 2016 Update 200 KB
App E1d GSA SOPs 2016 1.4 MB
App E2 2016 ADOT Street Sweeping Report 2 MB
App E3 2016 MOA Street Sweeping Report 15 MB
App E4a 2016 ADOT SWPPP Inspections 8 MB
App E4b2016 ARDSA SWPPP Inspections 8.5 MB
App E4c 2016 CBERRRSA SWPPP Inspections 19 MB
App E5 2016 MOA Pesticide Use 1 MB
App F1 2016 Illicit Discharge Complaints Map 370 KB
App F2 MOA Spill Response Proceduere 100 KB
App F3 2016 Dry Weather Screening Report 660 KB
App F3a 2016 Dry Weather Screening Report Attachments 13 MB
App G1 2016 APDES Public Outreach Report 25 MB
App G2 2016 Annual Meeting Summary 2 MB
App G3 2016 Semi-annual APDES Meeting Summaries 148 KB
App H1 2016 Pesticide Screening Report 3.6 MB
App H2 2016 Stormwater Monitoring Report 10 MB
App H2a 2016 Stormwater Report Attachments 23 MB
App H3 2016 Monitoring Program Performance Evaluation 727 KB
App H3a Education Program Performance Evaluation 147 KB
App H4 2016 QAP Update App A Pesticides 400 KB