Md. Code, Environment § 3–403

(a) A political subdivision may enforce the sound level limits and noise control rules and regulations adopted under this title.

(b) A political subdivision that enforces a noise control standard adopted under this title or an ordinance concerning noise may:

(1) Investigate a complaint concerning noise;

(2) Institute and conduct a survey and testing program concerning noise;

(3) Test or make another determination of the source of a noise; and

(4) Assess the degree of required abatement of the noise.

(c) Each sound level limit shall be applied at the boundary of:

(1) A property; or

(2) A land use category, as determined by the responsible political subdivision.