for Members, Consumers, Our Communities & the Environment
Washington State has approximately 1.5 million decentralized wastewater systems in use, it is our mission as an Association, with the help of our members, consumers and local government; to ensure that we put the water back into our communities the way we found it. Helping to replenish nature’s support system with a long term sustainable approach to wastewater disposal and treatment.
"On-site wastewater management system" (also called a“Decentralized system”), has become a commonly-used term to describe a wastewater treatment system that treats and disperses wastewater at or near its source. Decentralized systems include systems which serve individual homes (often known as a "Septic System"), a cluster of homes, a subdivision or small community as well as commercial and industrial complexes.
These systems take advantage of the vast capacity of soil to remove or transform pollutants that are in the effluent as it percolates through the soil thereby maintaining the quality and quantity of our groundwater. By definition, onsite wastewater management systems are a ‘green technology’ because treated effluent recharges local aquifers.