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NPDES MS4 Annual Report 2021

This Annual Report was assembled to detail the activities in Anne Arundel County for the County and State Fiscal Year (FY) beginning July 1, 2020 and ending June 30, 2021. These activities demonstrate compliance with the National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) permit terms provided by 40 CFR 122.42(c). It describes the components of the stormwater management program and the associated implementation status. This annual report also summarizes the monitoring programs implemented by Anne Arundel County, including data collection and analysis.

On February 12, 2014, the County was issued a Fourth-Generation NPDES MS4 Permit and, in February 2019, that permit was administratively continued until November 5, 2021 when the Fifth-Generation MS4 Permit was issued. This FY21 MS4 Annual Report is the eighth and final Annual Report prepared under the Fourth-Generation permit.

Water Drop NPDES MS4 Annual Report 2021

NPDES MS4 Annual Report 2021 - Cover Letter

Water Drop Appendix A: Digital Data (including MS4 Geodatabases)

Water Drop Appendix B: Program Documents

Water Drop Appendix C: Church Creek and Parole Plaza Monitoring Report

Water Drop Appendix D: Picture Spring Branch Monitoring Report

Water Drop Appendix E: Illicit Discharge Detection & Elimination (IDDE) Report

Water Drop Appendix F: Litter and Floatables Comprehensive Plan

Water Drop Appendix G: Property Management 

Water Drop Appendix H: Countywide TMDL Stormwater Restoration Plans

Water Drop Appendix I: FY2021 Financial Assurance Plan and Report


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