The Rhode Island Department of Health is reopening four beaches for swimming, meaning all 115 beaches in the state are clear.  The four areas that were closed because of high bacteria levels were Conimicut Point Beach in Warwick, Larkin Pond Beach Club and Kingston Camp beach in Kingston, and DiFonso Recreational Area beach in Glocester.  The health department and the Rhode Island Department of Environmental Management are telling people to avoid contact with the Slack Reservoir in Greenville due to a blue-green algae bloom in the pond.