Tri City WWTP - Advanced Wastewater Treatment in O'Kean, Arkansas

Tri City WWTP is a municipal wastewater treatment facility located in O'Kean, Randolph County, Arkansas. Serving a small population of 445 residents, the plant provides advanced treatment to protect local water quality. Its designed capacity of 181.70 units supports the community's current and future needs. The plant employs advanced treatment processes, exceeding the secondary treatment standard required by the US Clean Water Act for smaller communities. As a facility in the United States, it operates under the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to safeguard receiving waters. The treated effluent from Tri City WWTP is discharged into local waterways that drain into the Mississippi River basin. This region supports diverse aquatic life and contributes to the overall health of the Mississippi River ecosystem, which ultimately flows into the Gulf of Mexico.

The plant discharges into local streams within the Mississippi River basin, which flows southward to the Gulf of Mexico. This watershed supports a variety of fish and wildlife species, and the advanced treatment helps minimize nutrient loading that could contribute to downstream hypoxia zones in the Gulf.