Granby WWTP - Secondary Wastewater Treatment Plant in Granby, Missouri

Granby WWTP is a municipal wastewater treatment facility located in Granby, Newton County, Missouri, serving a population of about 2,121. The plant provides secondary treatment, which is the standard level for small communities in the United States under the Clean Water Act. The plant has a designed capacity of 832.79 thousand cubic meters and discharges approximately 719.23 thousand cubic meters of treated effluent annually. As a secondary treatment facility, it meets the EPA's minimum requirements for biological treatment of organic matter and suspended solids. The treated effluent is discharged into a local waterway that ultimately drains into the Spring River, part of the Arkansas River basin. This watershed supports diverse aquatic life and provides water for agricultural and recreational uses downstream.

The plant's discharge enters a tributary of the Spring River, which flows into the Arkansas River and eventually reaches the Mississippi River. The local watershed is primarily rural and agricultural, with sensitive aquatic habitats that benefit from the plant's secondary treatment reducing pollutant loads. The region's karst topography means groundwater resources are also vulnerable to contamination.