State Stormwater Management Program in North Carolina

The NC stormwater program targets new development that disturbs one acre or more, projects within 20 coastal counties, and projects draining to nutrient-sensitive or trout waters. Builders must use approved best management practices, control post-construction runoff, and obtain coverage under state permits. Local governments delegated to administer stormwater rules cannot adopt programs weaker than state standards. The Environmental Management Commission sets minimum design criteria through 15A NCAC 02H .1000 series, which apply universally across NC.

Discharging without a permit, exceeding peak flow standards, failing to install approved BMPs, or not maintaining controls can trigger civil penalties up to $25,000 per day.