Granada SD Wastewater Treatment Plant, Prowers County, Colorado

Granada SD is a municipal wastewater treatment plant located on North Cline Street in Prowers County, Colorado, serving a small community of 610 residents. The facility operates as part of the region's water infrastructure, managing domestic wastewater from the Granada area. As a secondary treatment plant, it provides biological treatment to reduce organic pollutants and suspended solids before discharge. The plant has a designed capacity of 302.83 cubic meters per day and currently treats an average daily flow of 151.42 cubic meters, indicating it operates at roughly half its capacity. Under the US Clean Water Act, plants of this scale are typically regulated through the National Pollutant Discharge Elimination System (NPDES) permit program, administered by the Colorado Department of Public Health and Environment. The treated effluent is discharged into local streams that drain into the Arkansas River basin, which ultimately flows through Kansas and Oklahoma into the Mississippi River system. This small agglomeration plays a role in protecting downstream water quality in the semi-arid High Plains region, where water resources are critical for agriculture and ecosystems.

The plant discharges into tributaries of the Arkansas River, which flows eastward across the Great Plains. The Arkansas River supports diverse aquatic life and provides irrigation water for agriculture in Colorado, Kansas, and Oklahoma. Downstream, the river contributes to the Mississippi River system, eventually reaching the Gulf of Mexico. The local watershed is semi-arid, making water quality management essential for maintaining ecological balance and supporting regional water needs.