PLAINFIELD STL Wastewater Treatment Plant, Plainfield, Iowa

PLAINFIELD STL is a municipal wastewater treatment plant located in Plainfield, Bremer County, Iowa, United States. The facility serves a small population of 455 residents and operates under secondary treatment standards, which are typical for small communities in the region. The plant's designed capacity is 189.27 megaliters, with an annual discharge volume of 151.42 megaliters, indicating operational utilization within its capacity. As a US facility, it is subject to the Clean Water Act and likely operates under an NPDES permit issued by the Iowa Department of Natural Resources, which sets effluent limits for secondary treatment. The treated effluent is discharged into local waterways that drain into the Cedar River basin, ultimately reaching the Mississippi River. This contributes to the water quality of the Upper Mississippi River watershed, which supports diverse aquatic life and is an important ecological corridor in the Midwest.

The plant discharges into the Cedar River basin, which flows into the Iowa River and then the Mississippi River. The Mississippi River is a major ecological corridor supporting diverse fish and bird species. The plant's secondary treatment helps protect downstream water quality in this agriculturally intensive region.