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

Section 12-272 of the Unified Development Ordinance sets the county's core stormwater standard: developments must be built and maintained so adjacent properties are not unreasonably burdened with surface water, split into two specific bans. First, a development cannot unreasonably impede the natural flow of water coming from higher adjacent land across the site in a way that causes substantial damage to that higher property. Second, a development cannot unreasonably collect and channel its own surface water onto lower adjacent property at locations or volumes that cause substantial damage there.

This standard works with section 12-271, which requires every development to have a drainage system adequate to prevent undue retention of surface water, bars channeling surface water into a sanitary sewer, and requires drainage systems to coordinate with drainage on surrounding properties and streets where practicable, with swales, curbs, gutters and storm drains built to North Carolina Department of Transportation standards. Section 12-270 adds that developments should conform to natural land contours where practicable and that lot lines should follow existing natural or manmade drainage ways rather than creating lots that can only be built on by altering them.

Section 12-273 layers on sedimentation and erosion control: no zoning or special use permit, and no final subdivision approval, can issue for land-disturbing activity subject to the state Sedimentation Control Commission's jurisdiction unless an erosion control plan is approved or the commission certifies one can be.