La Motte STP - Secondary Wastewater Treatment in La Motte, Iowa

La Motte STP is a municipal wastewater treatment facility located in La Motte, Jackson County, Iowa. It serves a small population of 272 residents, reflecting the rural character of the community. The plant is situated on Pleasant Street and operates as part of the local infrastructure managed by the city. The plant provides secondary treatment, which is the standard required by the US Clean Water Act for municipal facilities of this scale. With a designed capacity of 227.12 thousand cubic meters per year and an actual discharge volume of 151.42 thousand cubic meters per year, the plant operates below its capacity. US plants of this size are typically permitted under the National Pollutant Discharge Elimination System (NPDES) by the Iowa Department of Natural Resources. The treated effluent is discharged into a local waterway that drains into the Mississippi River basin. The plant's inland location, over 50 km from the coast, reduces direct marine impact. Its operation helps protect local streams and the broader Mississippi River ecosystem from untreated wastewater pollution.

The plant discharges into a tributary of the Mississippi River, which flows south to the Gulf of Mexico. The Mississippi River basin supports diverse aquatic life and is a critical migratory corridor for birds and fish. The plant's secondary treatment reduces organic pollutants and suspended solids, helping maintain water quality in the downstream environment.