Bill > SB189

This bill, known as Mason's Law, requires municipalities in Maryland to install approved grating systems on all open drainage inlets, which are defined as structures with an opening of 12 inches or more designed to collect stormwater runoff. An approved grating system is a cover that allows water to enter but prevents large debris from entering the drainage system, and includes options like standard yard inlets, raised grates, trash rack gratings, or incorporated precast concrete boxes for new inlets. Municipalities must incorporate these systems into any new open drainage inlets they construct and install them on all existing open drainage inlets by June 1, 2027, ensuring these gratings are secured in a way that prevents removal without proper tools or by floodwater force. The law takes effect on October 1, 2026.

Education

https://mgaleg.maryland.gov/mgawebsite/Legislation/Details/SB0189?ys=2026RS