In a press release, the city of Manitowoc asked citizens to keep lawn trimmings out of the street. According to the City of Manitowoc’s Municipal Code, it is unlawful to deposit grass trimmings onto any City Street or Alley at any time. The trimmings can get into the sewer system and add unnecessary nutrients into the water, which eventually drains into streams, rivers and lakes in the area. You can stop down at City Hall to pick up a free lawn sign to remind yourself and your neighbors.