Hazen Lagoon Wastewater Treatment Plant, Hazen, North Dakota

Hazen Lagoon is a municipal wastewater treatment facility located in Hazen, Mercer County, North Dakota. Serving a population of approximately 2,400, the plant is part of the region's infrastructure for managing domestic wastewater in a rural setting. The plant provides secondary treatment, which is the standard level required by the U.S. Clean Water Act for municipal facilities. With a designed capacity of 938.78 megaliters per year and an actual discharge volume of 757.08 megaliters per year, the plant operates well within its capacity, indicating effective management of current flows. Treated effluent from Hazen Lagoon is discharged into the local watershed, which ultimately drains into the Missouri River. The Missouri River is a major waterway supporting diverse aquatic life and providing water for communities downstream. The plant's operations help protect this vital river system from untreated wastewater pollution.

The plant discharges into the local watershed that drains to the Missouri River, a major tributary of the Mississippi River system. The Missouri River supports diverse aquatic ecosystems, including fish species such as paddlefish and sturgeon, and provides habitat for migratory birds. The plant's secondary treatment helps reduce nutrient and pathogen loads, protecting downstream water quality in this ecologically significant river basin.