For questions regarding the City’s Sludge Only Landfill or to report an odor complaint please contact Veolia at 978-630-8791 during normal business hours. For after business hour sludge landfill complaints please call Gardner Police Department dispatch at 978-632-5600 . Please leave your call back information and a brief description of the complaint. The complaint will be forwarded to the appropriate on-call staff for follow up. When reporting a complaint please provide the exact location and time of the complaint so Veolia operators can respond appropriately.