No. It is not permitted to connect any stormwater or rainwater drainage system to the sewer system. Drainage system piping that connects to the sewer system is an illicit connection that should be disconnected and directed elsewhere by a licensed plumber. Directing rainwater, stormwater and snowmelt into the sewer can result in sewage backups onto private property or overflow of the City’s sewer. This also applies to directing flood waters into sewer manholes. If you believe you have an illicit drainage line connected to the sewer system, please contact the Wastewater Division at 508-532-6060.