A beach closure order was lifted for the ocean side of Silver Strand Sunday, as bacteria tests came back normal, but the beaches from the border up to Imperial Beach remained closed to human water contact.
The ocean was contaminated from the border north past Imperial Beach, as runoff containing human waste flowed down the Tijuana River following recent rains.
The county Department of Environmental Health lifted the water closure for the Silver Strand shoreline. The ocean shoreline from the border to Carnation Avenue in Imperial Beach will remain closed until sampling confirms these areas are safe for water contact, according to the agency.
The Imperial Beach shoreline was closed Friday, and the closure was later extended north to Silver Strand.
The health agency warned that levels of bacteria can rise significantly in ocean and bay waters especially near storm drains, creeks, rivers and outlets where runoff flows. The runoff can contain bacteria from a variety of sources including animal waste, soil and decomposing yard waste and organic material.
City News Service contributed to this article.