MADISON, Wisconsin, July 18 (TNSres) -- The University of Wisconsin Sea Grant Institute issued the following news: Ah, a summer day at the beach: cool water, warm sand and a beverage at hand. Wisconsin's 180 public beaches are one of the state's most-valued assets. They provide recreational opportunities, economic benefits for coastal communities and enhance the quality of life for residents. Keeping those beaches safe for people to use is a continuing process. Beach managers use levels of Esc  more