The town’s extensive sewer system is run by the Sewer Division of the Department of Public Works. The office is on the second floor of Town Hall; office hours are 8 to 4, public hours are 8:30 to 3. For information, call 203-622-7760 or visit the Web page online at greenwichct.org. Permits to connect to sewer lines are issued from this office. The 2011 sewer rate is 0.53. up from 0.45 in 2010-11.