Rockville, MD Landscaping Rules: Water Restrictions (2026)

Outdoor water use for landscaping in Rockville is regulated by WSSC Water and the Maryland Department of the Environment (MDE). During normal conditions, WSSC encourages water conservation but does not impose mandatory watering schedules. When the MDE declares drought conditions, WSSC imposes escalating restrictions. Under Level One mandatory restrictions, all outdoor water use is banned including lawn watering, homeowner car washing, filling or topping off private pools, and washing outdoor paved surfaces. The city also falls under the Chesapeake Bay watershed, where stormwater management and water conservation are ongoing priorities. Rockville's RainScapes Rebate Program encourages residents to install rain gardens, rain barrels, and other stormwater management practices that reduce irrigation needs. The city provides rebates of up to $5,000 for eligible properties that install qualifying stormwater management features. During non-drought periods, there are no standing restrictions on watering times or days, but WSSC encourages watering during early morning or evening hours to minimize evaporation. New landscape installations during development projects must comply with the city's Landscaping, Screening and Lighting Manual, which encourages drought-tolerant plantings.