Water dirtied from household and industry use is called sewage or wastewater. Wastewater contains anything that goes down a drain, like human waste, chemicals from household cleaners and pesticides, pieces of paper, bits of food, and leftover drinks. Wastewater is cleaned at a wastewater treatment plant.

The Vallejo Sanitation and Flood Control District treatment plant is designed so that wastewater is cleaned through physical, biological and chemical processes. The resulting treated water, also known as effluent, flows through large pipes to a deep-water outfall in the Carquinez Strait. During heavy rains, effluent flows that exceed 30 million gallons per day are blended with secondary effluent and discharged to the Carquinez Strait, with additional secondary treated flows discharged to the Mare Island Strait.

  

© 2005 Vallejo Sanitation and Flood Control District