Health Code Requirements for Restaurant Countertops
New and remodeled food service spaces in Maryland go through plan review before work starts. In the city, that means the Baltimore City Health Department plan review office; in the counties, it is the local health department.
Maryland's food service rules, found in COMAR 10.15.03, call for surfaces that are smooth, durable, nonabsorbent and easily cleanable. For stone, that means a sealed surface, tight seams filled flush with epoxy, and no open fissures or pits where food and bacteria can collect.
Some quartz products are certified to NSF/ANSI 51, the standard for food equipment materials. If your plan reviewer asks for it, check the manufacturer's listing for the exact color before you order.