Grady County RWD 2 Amber Wastewater Treatment Plant - Oklahoma

Grady County RWD 2 Amber is a municipal wastewater treatment facility located in Amber, Grady County, Oklahoma. The plant serves a small population of 530 residents, providing essential sanitation services for this rural community. As a secondary treatment plant, it meets the minimum federal standard for wastewater treatment under the US Clean Water Act. The plant has a designed capacity of 174.13 thousand gallons per day and currently discharges an average of 94.64 thousand gallons per day, indicating operational headroom. Secondary treatment typically involves biological processes such as activated sludge or trickling filters to remove organic matter and suspended solids. The facility operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets discharge limits to protect water quality. The treated effluent is discharged into local streams that drain into the Washita River basin, ultimately flowing into the Red River and the Gulf of Mexico. The plant plays a key role in protecting downstream water quality in this agriculturally intensive region of central Oklahoma. Its small scale and inland location reduce its environmental footprint compared to larger coastal facilities.

The plant discharges into local tributaries of the Washita River, which flows through central Oklahoma before joining the Red River along the Texas-Oklahoma border. The Red River then drains into the Mississippi River and the Gulf of Mexico. The surrounding watershed supports agricultural activities and provides habitat for diverse aquatic species, including several native fish and mussel species. The plant's secondary treatment helps reduce nutrient and organic pollutant loads that could otherwise contribute to downstream eutrophication in the Gulf of Mexico's hypoxic zone.