McNeil WWTP - Advanced Wastewater Treatment in Emon, Arkansas

McNeil WWTP is a municipal wastewater treatment facility serving the small community of Emon in Columbia County, Arkansas. The plant treats wastewater from approximately 516 residents, operating as part of the region's water infrastructure in the southern United States. The plant employs advanced treatment processes, which exceed the secondary treatment standard required by the US Clean Water Act for most municipal facilities. With a designed capacity of 757.08 cubic meters per day and an average discharge volume of 257.41 cubic meters per day, the plant operates well within its capacity, ensuring reliable treatment for the community. Treated effluent from McNeil WWTP is discharged into local waterways that drain into the Ouachita River basin, ultimately reaching the Mississippi River and the Gulf of Mexico. The advanced treatment level helps protect downstream aquatic ecosystems and supports water quality in this ecologically diverse region.

The plant discharges into local streams that flow into the Ouachita River, a major tributary of the Mississippi River system. This watershed supports diverse aquatic life and provides habitat for fish and wildlife species. The advanced treatment helps minimize nutrient loading and protects downstream water quality in the Gulf of Mexico, where nutrient pollution can contribute to hypoxic zones.