Orchard Lagoon Wastewater Treatment Plant, Orchard, Iowa

Orchard Lagoon is a wastewater treatment facility located in the small town of Orchard, Iowa, in the United States. The plant serves a population of 93 residents, reflecting its role as a small-scale municipal treatment system in a rural agricultural setting. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for municipal wastewater facilities. With a designed capacity of 37.85 million gallons per year and a discharge volume matching that figure, the plant operates at full capacity. As a small facility, it is subject to state-level NPDES permitting under the authority of the Iowa Department of Natural Resources. The treated effluent is discharged into local waterways that ultimately drain into the Mississippi River basin. The plant's location in northeastern Iowa places it within the Upper Mississippi River watershed, which supports diverse aquatic life and is a critical migratory corridor for birds and fish. Proper treatment helps protect downstream water quality in this ecologically significant region.

The plant discharges into local streams that flow into the Cedar River, a tributary of the Iowa River, which eventually joins the Mississippi River. The Mississippi River basin supports a wide range of aquatic species and is an important migratory route. The plant's secondary treatment helps reduce nutrient and pathogen loads, protecting downstream ecosystems from eutrophication and contamination.