3 Acre Stormwater Permitting Rule

3 Acre Stormwater Permitting Rule

Per Act 64 (Vermont Clean Water Act) and Lake Champlain TMDL Plan requirements, the Vermont Department of Environmental Conservation (DEC) is required to adopt a new rule and general permit for stormwater management from “three-acre sites.” Three acre sites are defined by DEC as "existing sites with three or more acres of impervious surface that lack a stormwater permit based on the 2002 Stormwater Management Manual." The 3 Acre Rule was adopted by DEC in February of 2019. It  includes standards applicable to the general permit, as well as all stormwater permitting. Please see below for resources on the 3 Acre Stormwater Permitting Rule.

• 3 Acre Rule General Permit
• Stakeholder Feedback Session: Three-acre Stormwater Permit Draft Rebate Program
• 3 Acre Rule Fact Sheet 
• Presentation on the 2019 New 3 Acre Rule
• List of Properties subject to the 3 Acre Rule
• Public Comment Response Summary

For more information on the Stormwater General Permit please visit DEC's Stormwater Permitting Rule Update Page.

For information on ARPA funding opportunities for properties that fall under the 3 Acre Stormwater General Permit, please visit the VT DEC “Treating Stormwater Runoff” page here.

The Vermont DEC Stormwater Program has separate Sections for Operational and Construction permitting. Please click here for the Stormwater Districts Contact page. There is a district contact map for operational permitting and a separate district contact map for construction permitting.