The following is general information pertaining to the specifics of the The Watershed Management Ordinance (WMO)

PDF Image  WMO (As amended on April 7, 2022) (6.86 MB)

PDF Document Icon Redline (As amended on April 7, 2022) (6.89 MB)


Frequently Asked Questions (FAQs)


WMO Permit Application Forms and Fees

Permit Flow Charts -- Under Revision, Currently Unavailable

Permit Checklists

Information Pamphlets for Developers and Homeowners

Authorized Municipalities and Multi-County Municipalities

Watershed Planning Areas

Detention and Volume Control Trading


The MWRD developed a Technical Guidance Manual (TGM), which will serve as a technical reference to the WMO. The TGM documents are accessible through the links below.

Technical Guidance Manual (TGM)

Appendix C. Standard Details & Notes (Updated October 2022)

WMO Design Calculators

WMO Model Templates


On April 7, 2022, the District’s Board of Commissioners adopted an amendment to the WMO imposing new regulatory requirements and defining new terminology for projects involving and/or impacting wetlands. A new Wetland/Riparian Environment Verification Form is available (for a $750 fee) to applicants who wish to receive verification of wetlands prior to submitting a full WMO permit application. This proposed amendment also includes clarifications to both the volume control and detention requirements for stormwater management, and allows dry floodproofing for non-residential structures.

The District held two virtual public meetings to discuss the April 7, 2022 amendment of the WMO and the new Watershed Management Ordinance Permit application submittal system (WPASS).  Slides from the virtual meetings can be accessed at the link below:

WMO Amendment Public Meetings, May 5, 2022 and May 12, 2022