Overview
EVANS STP is a municipal wastewater treatment plant serving Evans, Colorado. It treats wastewater for approximately 12,380 residents under the US Clean Water Act framework.
EVANS STP is a municipal wastewater treatment plant located in Evans, Colorado, United States. The facility serves a population of approximately 12,380 residents in the city and surrounding area, operating as part of the region's water infrastructure. As a US-based plant, EVANS STP operates under the Clean Water Act, which requires National Pollutant Discharge Elimination System (NPDES) permits for all discharges. For a plant serving this population size, secondary treatment is typically mandated, with additional nutrient removal requirements in sensitive watersheds. The plant's treated effluent is discharged into the South Platte River basin, which flows through Colorado and Nebraska before joining the Platte River. This waterway supports agricultural irrigation, municipal water supplies, and diverse aquatic habitats, making proper treatment essential for downstream water quality.
Environmental context
EVANS STP discharges into the South Platte River watershed, which ultimately drains to the Platte River and then the Missouri River system. The South Platte River is a critical water source for agriculture and communities in northeastern Colorado. The river supports a variety of fish species and provides habitat for migratory birds along the Central Flyway. Proper wastewater treatment helps maintain water quality for downstream uses and ecological health.
Frequently asked questions
EVANS STP is located at 3384 1st Avenue in Evans, Weld County, Colorado, United States.
EVANS STP serves approximately 12,380 residents in the Evans area.
EVANS STP discharges into the South Platte River watershed, which flows into the Platte River and eventually the Missouri River.
Under the Clean Water Act, wastewater treatment plants in the US must obtain NPDES permits that set limits on pollutants. Plants serving populations over 10,000 typically require secondary treatment, and may need advanced treatment if discharging to sensitive waters.
For a plant of this size in Colorado, secondary treatment is standard, often including biological processes like activated sludge. Additional nutrient removal may be required to protect the South Platte River from eutrophication.
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