Calvert County, MD Public Health Rules: Rodent Control (2026)

Section 75-10 of Chapter 75 sets the county's baseline rodent-control standard for rental structures and premises in Calvert County outside Chesapeake Beach and North Beach: 'All premises shall be free from infestation of insects, rodents, vermin or other pests' (§ 75-10B(2)). The same section requires exterior surfaces, foundations, walls and roofs to be kept in condition to 'exclude rodents and other pests' (§ 75-10C(3)), and windows, doors and frames must be maintained 'so as to exclude rain and rodents as completely as possible' (§ 75-10C(10)).

' Responsibility for that extermination is split by § 75-15D: the property owner must exterminate before renting or leasing any unit, a tenant in a single-unit structure is responsible for pests in that structure, and in a multi-unit building the owner or operator handles extermination unless a tenant's own failure to take reasonable precautions caused the infestation. During the warm months, § 75-10C(13) separately requires tight-fitting insect screens on doors and windows used for ventilation between April 1 and December 1.