In early October, the research vessel Lake Guardian returned to its home port in Milwaukee, Wisconsin, after a busy field season of offshore surveillance on all five Great Lakes. Among other activities, the Guardian monitored the low-oxygen “dead zone” in Lake Erie, hosted teacher trainings and public tours, and conducted several intensive studies of Lake Ontario.  

• The 2018 Lake Guardian Surveillance (PDF)(2 pp, 340 K, October, 2018)