If your street is not found in the online database, first try a partial spelling (e.g. WASH instead of N WASHINGTON). If it still does not appear, then there are two cases to consider:
In the first case, if you know that the street has actual street signs on it for street cleaning, then please contact Public Works with all details (street name, neighborhood, cross streets, and the posted schedule) so that we can make sure it's entered in the database. In the meanwhile, always obey the street sign.
In the second case, if the street does not have signs on it, then the street is probably not part of the "posted" Neighborhood Street Cleaning program. Streets with posted parking restrictions are swept to the curb according to the schedule written on street signs. Other public streets in Boston are swept intermittently by Public Works, but not necessarily on a schedule, and not all the way to the curb enforced by parking restrictions. For questions or to report debris on such streets, call the Mayor's Hotline (617-635-4500).