Golden Valley Lagoon Wastewater Treatment Plant, Golden Valley, North Dakota

Golden Valley Lagoon is a municipal wastewater treatment facility located in Golden Valley, Mercer County, North Dakota. The plant serves a small population of 182 residents, reflecting the rural character of the area. It is situated in the Great Plains region, where cold winters and variable precipitation influence treatment operations. The plant provides secondary treatment, which is the standard biological process required under the U.S. Clean Water Act for facilities of this scale. Secondary treatment removes biodegradable organic matter and suspended solids, reducing pollution loads before discharge. The designed capacity matches the current discharge volume of 37.85 megaliters per year, indicating the plant operates at full capacity. The treated effluent is released into the local watershed, which ultimately drains into the Missouri River basin. The Missouri River is a major tributary of the Mississippi River, supporting diverse aquatic life and providing water for agriculture and communities downstream. The plant's location more than 10 km from the coast reduces direct marine impact, but its discharge contributes to the overall water quality of the inland river system.

The plant discharges into the Missouri River watershed, which flows through the Great Plains and eventually joins the Mississippi River. This river system supports a variety of fish species, including paddlefish and catfish, and provides critical habitat for migratory birds along the Central Flyway. The semi-arid climate of North Dakota means that maintaining water quality in these rivers is essential for both ecological health and human uses such as irrigation and drinking water.