Small MS4 Coalition v. Department of EnvironmentAnnotate this Case
The Court of Appeals affirmed the decisions of the lower courts affirming a general permit that the Maryland Department of the Environment issued for operators of thirty-five small municipal separate storm sewer systems (MS4s) in Maryland, including Petitioner Queen Anne's County, which operated a small MS4, holding that conditions based on regulations of the Environmental Protection Agency (EPA) in the general permit for small MS4s are not unlawful simply because they may exceed the minimum requirements of the Clean Water Act.
In Maryland Department of the Environment v. County Commissioners of Carroll County, 140 S. Ct. 1265 (2020), the Court of Appeals held that permits issued to counties that operated MS4s were lawful even if some permit conditions exceeded the minimum requirements of the Act. In the instant case, the circuit court for Queen Anne's County concluded that the decision in Carroll County addressed the issues raised by the County and affirmed the permit. The court of special appeals affirmed. The Court of Appeals affirmed, holding (1) the holdings of Carroll County applied in this case; and (2) an impervious surface restoration requirement in the permit, which was similar to but less onerous than a permit requirement assessed in Carroll County, did not unlawfully make the County responsible for discharges by third parties.