Md. Code, Environment § 9–717

A person who violates any provision of or fails to perform any duty imposed by Part II of this subtitle, or who violates any provision of or fails to perform any duty imposed by a rule, regulation, order, or permit adopted or issued under Part II of this subtitle, is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $100 or imprisonment not exceeding 30 days in the county jail, or both.