Cold Spring STP | Wastewater Treatment Plant in Cold Spring, Minnesota

Cold Spring STP is a municipal wastewater treatment facility located at 471 1st Street South in Cold Spring, Minnesota. It serves a population of about 4,235 people in this central Minnesota community, situated within Stearns County. The plant is part of the region's infrastructure for managing domestic wastewater. As a small-to-medium agglomeration, the plant is subject to the U.S. Clean Water Act and National Pollutant Discharge Elimination System (NPDES) permitting. Facilities of this scale typically employ secondary treatment to meet effluent standards. Operational status and permit compliance ensure ongoing treatment. The plant discharges treated effluent into a local water body that ultimately drains into the Mississippi River basin. This watershed supports diverse aquatic life and provides water resources for communities downstream. The plant's performance is critical to maintaining water quality in the region's rivers and lakes.

The treated effluent from Cold Spring STP enters a local stream that flows into the Sauk River, a tributary of the Mississippi River. The Mississippi River basin is a major ecological corridor supporting fish, birds, and other wildlife. Downstream, the river system contributes to the Gulf of Mexico ecosystem. Protecting water quality in this watershed helps sustain recreational uses and aquatic habitats.