A General Rain Advisory is in effect for the coastal waters of San Diego County due to contamination by rain runoff, according to the Department of Environmental Health.
Levels of bacteria can rise significantly in ocean waters, especially near storm drains, creeks, rivers and lagoon outlets that discharge urban runoff.
Swimming, surfing and other water contact should be avoided for 72 hours after the rain.
The advisory applies to beaches from San Onofre State Beach to Border Field.
