The warning signs are removed after additional testing indicates that bacterial levels have returned to normal levels. If there is a sewage spill or chemical discharge, beaches are immediately closed regardless of the bacteria levels. Beaches are reopened only after testing indicates ocean waters meet State standards. As a precaution, avoid contact with storm drain water or runoff and ocean waters adjacent to where storm drains discharge into the ocean for a distance of at least 100 yards. Avoid swimming adjacent to piers.
Piers are an attractant to birds which cause elevated bacterial levels.
In addition, plumbing under piers is occasionally in disrepair and may discharge sewage into the water. Ocean water should be avoided for 72 hours after a rainstorm. The high volume of storm drain water discharged during and after a rainstorm can cause high bacteria levels throughout ocean waters along the coast, especially near storm drain discharges. If a beach area is posted with warning signs or is closed, avoid all contact with the water. If you have any question about where it is safe to swim ask a lifeguard.