Robbins WWTF - Yuba City, California Wastewater Treatment Plant

Robbins WWTF is a municipal wastewater treatment facility located in Yuba City, California, within Sutter County. The plant serves a small population of 391 residents and operates under secondary treatment standards, which is the minimum required by the US Clean Water Act for municipal wastewater. The facility's designed capacity is 113.56 units, with an average daily discharge of 105.99 units, indicating near-capacity operations. As a secondary treatment plant, Robbins WWTF uses biological processes to remove organic matter and suspended solids from wastewater. The plant is subject to the National Pollutant Discharge Elimination System (NPDES) permit program, which sets effluent limits to protect water quality. For small plants like this, permits typically require compliance with secondary treatment standards and may include monitoring for specific pollutants. The treated effluent from Robbins WWTF is discharged into a local water body that ultimately drains into the Sacramento River system, which flows through California's Central Valley to the Sacramento-San Joaquin Delta and San Francisco Bay. This watershed supports diverse aquatic life and is critical for regional water supply and agriculture. The plant's discharge contributes to the overall water quality of the downstream environment.

Robbins WWTF discharges into a tributary of the Sacramento River, which flows through the Central Valley to the Sacramento-San Joaquin Delta and into San Francisco Bay. The downstream environment supports a variety of fish species, including salmon and steelhead, and provides habitat for migratory birds. The plant's secondary treatment helps reduce nutrient and organic loads, protecting the ecological health of the river system.