EPA has made available online information on the uses and benefits of decentralized wastewater treatment and examples of where they have played an effective role in a community's wastewater treatment infrastructure. Decentralized wastewater treatment consists of a variety of onsite approaches for collection, treatment, dispersal, and reuse of wastewater and can be a sustainable and appropriate option for communities and homeowners. The four papers include an introductory paper as well as three papers that demonstrate how decentralized wastewater treatment can be: a sensible solution, cost-effective and economical, green and sustainable, and protective of the environment, public health, and water quality.
More information [1]