Introduction Our needs for clean water and adequate wastewater treatment will never end, and as we move forward in the 21st century, the decentralized wastewater management concept will play a greater role in meeting the needs for adequate wastewater treatment than it has in previous centuries. The best way to predict the future for onsite systems is for all of us involved in the onsite industry to participate in making and shaping that future. The future is bright for addressing wastewater treatment needs using advanced onsite wastewater systems technologies under a utility management concept such as the one presented in this book. There are plenty of business, education, and regulatory opportunities for all the players involved in the onsite industry and in this century we will make the use of decentralized wastewater systems an integral part of our wastewater infrastructure.