Authorities in areas in California, Illinois, Massachusetts, New York, and Washington state have shut down some beaches ahead of the July 4 weekend due to high levels of bacteria.
Officials in San Diego, California, have shut down at least a half-dozen beaches because bacteria levels may exceed health standards and advised swimmers to avoid water contact in the closure areas.
A notice published by health authorities in San Diego County on July 1 said that significant rain can cause runoff from urban areas to enter oceans and bays, causing bacteria levels to increase.
“This contamination causes bacteria to increase significantly in ocean and bay waters, especially near storm drains, rivers, and lagoon outlets,” the notice said….