The 23rd annual beach water quality report released by the Natural Resources Defense Council found 80 percent of the closings and advisories were issued because testing revealed bacteria levels in the water violated public health standards, confirming serious water pollution persists at many U.S. shores.
The primary known cause of this pollution is massive storm water runoff and sewage, the report said.
"Sewage and contaminated runoff in the water can spoil a family vacation real fast, turning a day of lounging at the beach into a day at the doctor's office with a sick child," Jon Devine, NRDC's senior attorney, said in the statement. "It's no surprise that pollution in the waves is bad for business in beach communities. Our government leaders can help support local economies and salvage countless summer getaways nationwide by tackling one of the principal sources of these problems -- storm water runoff."
The researchers analyzed the latest beach water testing data results from the U.S. Environmental Protection Agency and state beach coordinators at more than 3,000 beach testing locations nationwide.
Thirteen beaches had exceptionally low violation rates and strong testing and safety practices last year. There were:
-- Alabama: Gulf Shores Public Beach in Baldwin County.
-- Alabama: Gulf State Park Pavilion in Baldwin County.
-- California: Bolsa Chica Beach in Orange County.
-- California: Newport Beach in Orange County.
-- Newport Beach - 38th Street.
-- Newport Beach - 52nd/53rd Street.
-- California: San Clemente State Beach in Orange County.
-- San Clemente State Beach - Avenida Calafia.
-- San Clemente State Beach - Las Palmeras.
-- Delaware: Dewey Beach - Dagsworthy in Sussex County.
-- Delaware: Rehoboth Beach in Sussex County.
-- Maryland: Ocean City at Beach 6 in Worcester County.
-- Michigan: Bay City State Recreation Area in Bay County.
-- Minnesota: Park Point Franklin Park / 13th Street South Beach Park Point in St. Louis County.
-- Minnesota: Lafayette Community Club Beach in St. Louis County.
-- New Hampshire: Hampton Beach State Park in Rockingham County.
-- New Hampshire: Wallis Sands Beach in Rockingham County.
Every year, more than 10 trillion gallons of untreated storm water, including hundreds of billions of gallons of untreated sewage overflow, make their way into U.S. waterways each year. It is this contaminated discharge which is the main known source of beach water pollution, the EPA said.
Notable deaths of 2014 [PHOTOS]