This brochure is for those of you who enjoy boating, are a member of a boat club or responsible for a marina. This brochure gives information about the duties of boat owners and marinas to reduce pollution in and around marinas. Examples of ways to reduce pollution are also given.Some solutions to reduce pollution will require changes and investments in the marina. Other solutions only require willingness to do things in a different way.We hope this brochure will be useful and inspiring for the many boat users in the Nordic countries.