Arcadia WWTP East - Secondary Treatment Plant in Arcadia, Missouri

Arcadia WWTP East is a municipal wastewater treatment facility located in Arcadia, Missouri, United States. The plant serves a small population of 120 residents, reflecting its role in a rural community within Iron County. It operates under the regulatory framework of the U.S. Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all point source discharges. The plant provides secondary treatment, a standard level that removes biodegradable organic matter and suspended solids. Its current discharge volume is 37.85 m³/day, operating below its designed capacity of 45.42 m³/day. As a small facility, it is subject to state-level oversight by the Missouri Department of Natural Resources, which issues permits and monitors compliance. The treated effluent is discharged into a local waterway that ultimately drains into the Mississippi River basin. This watershed supports diverse aquatic life and provides water resources for downstream communities. The plant's location inland, away from coastal zones, reduces direct marine impact, but its discharge contributes to the overall water quality in the region's freshwater systems.

The plant discharges into a tributary of the St. Francis River, which flows into the Mississippi River and eventually the Gulf of Mexico. The local watershed supports aquatic habitats including fish and macroinvertebrate communities. Downstream, the Mississippi River is a major migratory corridor for birds and fish, and its water quality affects extensive floodplain ecosystems and human water supplies.