Holden WWTP - Secondary Wastewater Treatment Plant in Holden, Missouri

Holden WWTP is a municipal wastewater treatment facility located on West 2nd Street in Holden, Johnson County, Missouri. The plant serves a population of about 2,710 residents, classifying it as a small to medium agglomeration under US regulatory frameworks. The plant provides secondary treatment, a standard level required by the US Clean Water Act for most municipal facilities. With a designed capacity of 1,135.62 thousand gallons per day and an actual discharge volume of 946.35 thousand gallons per day, the plant operates at approximately 83% capacity. As a US facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting, which sets effluent limits to protect water quality. The treated effluent is discharged into a local water body, likely a tributary of the Missouri River system. The plant's location in inland Missouri means its discharge ultimately contributes to the Mississippi River basin, supporting downstream aquatic ecosystems and water quality in the region.

The plant discharges into a local watercourse that drains into the Missouri River watershed, part of the larger Mississippi River basin. This inland location supports diverse aquatic life and provides important habitat for fish and migratory birds. The secondary treatment process helps reduce organic pollutants and suspended solids, protecting downstream water quality in the Missouri River system.