A public health advisory was issued Wednesday due to higher-than-normal levels of bacteria in ocean waters at Seaside Beach in Clatsop County.Increased pathogen and fecal bacteria levels in ocean waters can come from both shore and inland sources such as storm water runoff , animal waste from seabirds, pets and livestock, sewer overflows and failing septic systems.Water samples indicate higher-than-normal levels of fecal bacteria, which can result in gastroenteritis, skin rashes and other illnesses. Direct contact with the water should be avoided until the advisory is lifted, especially for children and the elderly, who may be more vulnerable to waterborne bacteria.While this advisory is in effect at Seaside Beach, visitors should avoid wading in nearby creeks or in discolored water and stay clear of water runoff flowing into the ocean. Even if there is no advisory in effect, officials recommend avoiding swimming in the ocean within 48 hours after a rainstorm.State officials advise that the status of water contact advisories at beaches is subject to change. For the most recent information on advisories, please visit www.healthoregon.org/beach or call 1-877-290-6767.Although state officials discourage water contact, they continue to encourage other recreational activities such as walking, playing on the beach, flying kites, and picnicking on these beaches because they pose no health risk even during an advisory. Neighboring beaches are not affected by this advisory.