Wayne County, NC Environmental Rules: Stormwater Management (2026)

Wayne County adopted this article, officially titled the Neuse Stormwater Ordinance for New Development under Sec. 78-58, to control nitrogen and runoff reaching the nutrient-sensitive Neuse estuary. Sec. 78-62(a) makes the article applicable to all development and expansion of development throughout unincorporated Wayne County, including the southeastern corner that drains to the Cape Fear Basin, and to any local government for which the county provides building inspection services. Exemptions in Sec. 78-62(b) matter for homeowners: single-family and duplex residential development disturbing less than one acre is exempt outright, and an individual single-family or duplex lot outside a larger common plan of development is exempt if it does not result in more than five percent built-upon area.

Commercial, industrial, institutional, or multifamily projects get a smaller half-acre exemption threshold, and expansions of existing structures on under half an acre stay exempt only if the parcel's cumulative built-upon area does not exceed 24 percent. Where the article does apply, Sec. 78-76 requires high-density stormwater design once a project's built-upon area reaches 24 percent, with engineered controls sized to treat one inch of rainfall, while Sec. 6 pounds per acre per year. Sec. 78-81 requires an operation and maintenance plan and a recorded O&M agreement for every engineered stormwater control before any permit issues.