LA SALLE WWTP - East La Salle, Colorado Wastewater Treatment Plant

LA SALLE WWTP is a municipal wastewater treatment facility located on County Road 52 in East La Salle, Weld County, Colorado. The plant serves a population of approximately 2,500 residents, providing essential sanitation services for this rural community in the South Platte River watershed. The facility operates with secondary treatment, which is the standard required by the US Clean Water Act for municipal plants of this scale. With a designed capacity of 1,741.28 thousand gallons per day and an average discharge volume of 681.37 thousand gallons per day, the plant maintains a utilization rate well within its capacity. Treatment processes meet federal and state regulations under the National Pollutant Discharge Elimination System (NPDES) permit program administered by the Colorado Department of Public Health and Environment. The treated effluent from LA SALLE WWTP is discharged into local drainage channels that flow into the South Platte River, a major tributary of the Platte River system. This river network ultimately drains into the Missouri River and then the Mississippi River, making the plant's operations important for downstream water quality across multiple states. The facility helps protect aquatic habitats and supports agricultural and recreational water uses in the region.

The plant discharges into the South Platte River basin, which flows through Colorado, Nebraska, and into the Platte River. This watershed supports diverse aquatic life, including fish species such as channel catfish and rainbow trout, and provides critical habitat for migratory birds along the Central Flyway. The river also supplies irrigation water for agriculture in the region, making nutrient removal from wastewater important for preventing eutrophication downstream.