Williamsburg STP - Wastewater Treatment Plant in Williamsburg, Iowa

Williamsburg STP is a municipal wastewater treatment facility located in Williamsburg, Iowa, serving a population of about 2,622. The plant is situated in Iowa County and is part of the town's infrastructure for managing domestic wastewater. As a small-scale facility in the United States, the plant is subject to the National Pollutant Discharge Elimination System (NPDES) under the Clean Water Act. This regulatory framework requires permits that set effluent limits based on technology and water quality standards. The plant discharges treated wastewater into a local water body, which ultimately drains into the Mississippi River Basin. This region is part of the larger Mississippi River watershed, supporting diverse aquatic life and agricultural activities downstream. Proper treatment helps protect water quality in this important river system.

The treated effluent from Williamsburg STP enters a local stream that flows into the Iowa River, a tributary of the Mississippi River. The Mississippi River Basin is a major ecological corridor supporting fish, migratory birds, and other wildlife. The plant's discharge contributes to the overall water quality in this watershed, which is used for recreation, agriculture, and drinking water downstream.