LEFT HAND STP - Boulder, Colorado Wastewater Treatment Plant

LEFT HAND STP is a municipal wastewater treatment plant located in Boulder, Colorado, United States. It serves a small population of 150 people, reflecting its role in a localized community within the broader Boulder area. The plant is situated at 2120 Canyon Boulevard in the Goss-Grove neighborhood. The plant provides secondary treatment, which is the standard level required by the US Clean Water Act for most municipal facilities. Its designed capacity is 37.85 units, with a similar discharge volume, indicating it operates at or near full capacity for its small service area. As a US facility, it is subject to National Pollutant Discharge Elimination System (NPDES) permitting, typically administered by the Colorado Department of Public Health and Environment. The treated effluent is discharged into a local water body, likely a tributary of Boulder Creek, which flows into the South Platte River and eventually the Mississippi River system. This discharge supports the aquatic ecosystem of the Front Range region, contributing to water quality management in the semi-arid Colorado climate.

The plant discharges into a local watercourse that drains into Boulder Creek, a tributary of the South Platte River. The South Platte flows through the Denver metropolitan area and joins the Platte River in Nebraska, ultimately reaching the Mississippi River and the Gulf of Mexico. The receiving waters support diverse aquatic life and are important for regional water supply and recreation. The plant's secondary treatment helps protect these downstream ecosystems from nutrient pollution and organic matter.