Environmental Rules in Rockville, MD (2026)
4 verified environmental rules for Rockville, Maryland, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Rockville holds a Municipal Separate Storm Sewer System (MS4) permit from the Maryland Department of the Environment and enforces stormwater management requirements for all development that disturbs 5,000 square feet or more. Stormwater management plans must conform to the latest MDE Design Manual. The city operates under National Pollutant Discharge Elimination System (NPDES) requirements to protect local waterways.
Rockville Stormwater Management Requirements
Heavy RestrictionsErosion Control
Rockville requires erosion and sediment control plans for earth-moving activity that disturbs 5,000 square feet or more of land or 100 cubic yards or more of soil. Plans are reviewed and approved under Article V, Chapter 19 of the Rockville City Code. Sediment basins, slope stabilization, and drainage controls must be installed before grading begins.
Rockville Erosion and Sediment Control Requirements
Heavy RestrictionsFlood Zones
Rockville regulates development in FEMA-designated flood zones under Chapter 10 of the Rockville City Code. The city participates in FEMA's National Flood Insurance Program (NFIP), allowing residents to purchase federally backed flood insurance. Development in the 100-year floodplain requires a floodplain development permit and must meet elevation and construction standards.
Rockville Floodplain Management Regulations
Heavy RestrictionsGrading & Drainage
Rockville requires grading permits and drainage plans for projects that disturb 5,000 square feet or more under Chapter 19 of the City Code. Finished grading must provide positive drainage away from all building foundations. Standing water on lawns must drain within 24 hours after rainfall, and drainage may not be redirected onto adjacent properties.
Rockville Grading and Drainage Requirements
Heavy RestrictionsLooking for Montgomery County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Rockville city rules.
Environmental Rules in Montgomery County →