Maryland Code, Environment § 10-305

(1) Any condition that is dangerous to health or safety, such as an inadequately protected swimming pool or ditch;

(2) Any condition that may adversely affect the public health, such as an unsanitary outhouse, a foul pigpen, an improperly functioning sewage system, an unkempt junkyard, an unkempt scrap metal processing facility, an excessive accumulation of trash or garbage, dead animals, a contaminated water supply, an inadequately protected water supply, or a rat harborage;

(3) Housekeeping in any building that is so poor that the health of the owner, occupants, employees, or neighbors may be endangered; and

(4) Any condition that may endanger health through the spreading of the condition by any means, including by streams, surface drainage, air currents, winged life, domestic animals, or human beings.