From the Sudbury town website:
The Route 20 Sewer Technical Advisory Committee (TAC) has prepared a comprehensive list of questions and answers to assist residents in informing themselves on Article 20 at the Annual Town Meeting, which requests an appropriation of approximately $1 million for the design and permitting of the Route 20 sewer project. If Article 20 passes at Town Meeting, a ballot vote will be needed for the appropriation. The ballot vote (election) is tentatively scheduled for June 2011.
The Route 20 sewer project is a long term project designed to sustain Sudbury both environmentally and economically. It aims to protect Sudbury’s drinking water in the Route 20 aquifer area, as well as assist businesses with their wastewater disposal so that they can stay and grow in Sudbury. Without alternative wastewater disposal, there is a risk of groundwater contamination and loss of business.
See http://sudbury.ma.us/news/3387/ for more information