MARBLE CITY WWT Wastewater Treatment Plant, Sequoyah County, Oklahoma

MARBLE CITY WWT is a municipal wastewater treatment facility located on Memorial Drive in Sequoyah County, Oklahoma, serving a small population of 242 residents. The plant operates under the regulatory framework of the United States Clean Water Act, which requires secondary treatment for all publicly owned treatment works. The plant provides secondary treatment, the standard level mandated by the EPA for municipal wastewater facilities. With a designed capacity of 94.64 thousand cubic meters and an annual discharge volume of 75.71 thousand cubic meters, the plant operates within its capacity to treat wastewater from the local community. The treated effluent is discharged into nearby waterways that drain into the Arkansas River basin, ultimately reaching the Mississippi River and the Gulf of Mexico. The plant plays a role in protecting local water quality and the downstream aquatic ecosystem in this inland region of Oklahoma.

The plant discharges into local streams that are part of the Arkansas River watershed, which flows into the Mississippi River and eventually the Gulf of Mexico. The surrounding area includes rural and forested terrain, and the receiving waters support diverse aquatic life and provide habitat for fish and wildlife. Proper treatment helps maintain water quality in this ecologically sensitive region.