Rainwater harvesting is legal and encouraged throughout Maryland, with statewide standards set under the Maryland Plumbing Code and MDE stormwater guidance applying uniformly across all jurisdictions.
Maryland does not restrict residential rainwater collection. Systems are governed statewide by the Maryland Plumbing Code (based on the IPC) Chapter 13, Section 1303, which addresses construction, installation, and treatment of nonpotable rainwater collection systems. The Maryland Department of the Environment publishes Stormwater Design Guidance for rainwater harvesting and lists rain barrels and cisterns among approved Environmental Site Design practices under COMAR 26.17.02. Indoor reuse is generally limited to nonpotable applications such as toilet flushing, cleaning, and laundry. Local jurisdictions may offer incentives or impose construction permitting but cannot prohibit collection.
Installing a system that fails to meet plumbing code cross-connection, labeling, or backflow requirements can result in inspection failures, correction orders, and fines from local code officials.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Baltimore, MD
Baltimore Health Code Title 9 sets a 55 dB(A) residential property-line limit, reduced 10 dB at night (10 p.m.-7 a.m. weekdays; midnight-7 a.m. weekends), wi...
Baltimore, MD
Baltimore has no city ordinance restricting lawn ornaments on residential property. Property maintenance under Article 13 requires yard upkeep but does not a...
Baltimore, MD
Baltimore has no city ordinance regulating residential inflatable holiday displays. Size, lighting, and blower noise are governed by condo/HOA covenants. Hea...
Baltimore, MD
Baltimore has no municipal ordinance regulating residential holiday lights. Display timing, brightness, and animation are governed by HOA/condo covenants and...
Baltimore, MD
Baltimore requires building permits for outdoor kitchens with gas lines, electrical wiring, plumbing, or structural roofs. Trade permits filed through DHCD e...
Baltimore, MD
Baltimore has no specific smoker ordinance, but the Health Code Title 9 noise limits and air quality standards may apply. Maryland Department of the Environm...
See how Baltimore's rainwater harvesting rules stack up against other locations.
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