City of Baltimore
Baltimore City Code

§ 11-206. Fence or wall required.

Every outdoor swimming pool must be completely surrounded by a fence or wall that:

(1) is at least 42 inches high; and

(2) except for doors or gates:

(i) has no openings, holes, or gaps larger than 4 inches in any dimension; or

(ii) for a picket fence, has a horizontal distance between pickets of no more than 4 inches.