Coral Gables, FL Environmental Rules: Stormwater Management (2026)

Coral Gables manages stormwater through a system of manholes, gravity mains, and force mains operated by the Public Works Utilities Division. The city is particularly susceptible to flooding because it is surrounded by the Atlantic Ocean, Biscayne Bay, Miami River, lakes, and canals, with ground elevations near sea level and a high water table. The city has invested in automated flood gate controls at canal mouths to prevent downtown flooding. All development and redevelopment projects must comply with stormwater management requirements to prevent increased runoff volume and rate from pre-development conditions. The city holds an NPDES Municipal Separate Storm Sewer System (MS4) permit requiring monitoring and controls to prevent pollutants from entering waterways. Illicit discharges to the stormwater system are prohibited, including pool and spa water, wash water, and chemical discharges. Construction projects must obtain a Public Works permit and implement best management practices for erosion and sediment control. New impervious surfaces may trigger stormwater retention or detention requirements. Properties must maintain drainage patterns and not redirect stormwater onto neighboring properties. Miami-Dade County DERM also exercises environmental oversight within the city.