Bill > HB34

This bill, known as Mason's Law, requires municipalities in Maryland to install approved grating systems on all open drainage inlets, both new and existing, to prevent large debris from entering the storm drain system while allowing stormwater to flow. An "approved grating system" is defined as a cover designed to keep out debris but let water in, and includes specific types like standard yard inlets, raised grates, trash rack gratings with certain dimensions, and precast concrete boxes for new inlets. An "open drainage inlet" is a structure with an opening of 12 inches or more designed to collect stormwater. The bill mandates that these grating systems must be secured to prevent removal without tools or by floodwater force, and existing inlets must have these systems installed by June 1, 2027, with the overall act taking effect on October 1, 2026.

Transportation and Infrastructure

https://mgaleg.maryland.gov/mgawebsite/Legislation/Details/HB0034?ys=2026RS