Tahlequah STP - Wastewater Treatment Plant in Cherokee County, Oklahoma

Tahlequah STP is a municipal wastewater treatment facility located in Cherokee County, Oklahoma, serving a population of about 14,458. The plant is situated in the rural-urban interface of northeastern Oklahoma, an area characterized by rolling hills and numerous streams that feed into the Arkansas River system. As a US facility serving a medium-sized community, Tahlequah STP operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which is part of the Clean Water Act. This regulatory framework requires secondary treatment as a baseline for municipal wastewater plants, with more stringent standards for discharges into sensitive waters. The plant's design and operation are subject to state and federal oversight to ensure compliance with water quality standards. The treated effluent from Tahlequah STP ultimately drains into the Illinois River watershed, which flows through Oklahoma and Arkansas before joining the Arkansas River and eventually the Mississippi River. The Illinois River is a popular recreational waterway known for its scenic beauty and supports diverse aquatic life, including several species of fish and freshwater mussels. The plant's discharge contributes to maintaining the ecological health of this important regional water resource.

Tahlequah STP discharges into the Illinois River watershed, which flows through the Ozark Plateau region. The Illinois River is a tributary of the Arkansas River, which eventually reaches the Mississippi River and the Gulf of Mexico. The watershed supports diverse aquatic habitats, including warm-water fisheries and mussel populations, and is used for recreation such as canoeing and fishing. The plant's operations are critical to protecting water quality in this ecologically sensitive region.