Yes, granite countertops can potentially harbor bacteria if they are not properly maintained and professionally sealed. Routine cleaning with mild soap and warm water is crucial for hygiene, and avoiding harsh chemicals or abrasive scrubbers will help preserve the sealant. Pay special attention to seams and edges, as these areas may be more susceptible to bacterial buildup if not adequately sealed or cleaned.
In summary, while granite is generally resistant to bacteria, proper maintenance, professional sealing, and regular cleaning are essential steps to ensure a hygienic and safe countertop surface.