Brown water off Del Mar from the Los Penasquitos Creek and the San Dieguito River. Photo by Chris Jennewein

The county Department of Environmental Health issued a general advisory for the coastal waters of San Diego County due to runoff from the recent record rainfall.

Swimmers, surfers, and other ocean users were warned late Monday that levels of bacteria can rise significantly in ocean and bay waters, especially near storm drains, creeks, rivers, and lagoon outlets that discharge urban runoff.

Urban runoff may contain large amounts of bacteria from a variety of sources, including animal waste, soil, and decomposing vegetation.

The county said swimming, surfing and diving should be avoided in all coastal waters for 72 hours.

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