The Fourth of July holiday can often be a great opportunity to visit the seaside for a sandy getaway. But local governments across the U.S. have issued warnings and closures to stay away from certain shores due to alarmingly high bacteria levels. As of Monday afternoon, at least 29 beaches in Massachusetts have been reported closed due to “bacterial exceedance,” according to the state’s Department of Public Health Beach Water Quality Dashboard. [time-brightcove not-tgx=”true”] In California’s San Diego County, one beach in the Coronado area has been closed since May as “bacterial levels exceed health standards,” according to its Department of Environmental Health and Quality’s Beach and Bay Water Quality Monitoring Program. In New York’s Nassau County, Crescent Beach has been closed for swimming as of Monday evening due to high levels of enterococci bacteria found in samples. Michigan’s Department of Environment, Great Lakes and Energy also reports that four beaches have been closed since last week, due to high bacterial levels.