Maryland Code, Environment § 8-507

(a) The Department may bring an action for an injunction against any person who violates any provision of this title or any regulation, order, or permit adopted or issued by the Department under this title.

(b) On a showing that any person is violating or is about to violate this title or any regulation, order, or license adopted or issued by the Department, the court shall grant an injunction without requiring a showing of a lack of an adequate remedy at law.

(c) If an emergency arises from imminent danger to the public health, to the public welfare, or to the environment, the Department may sue for an immediate injunction to stop any activity that is causing the danger.