HONOLULU - The Department of Health detected a high bacteria count at Kaalawai Beach on O'ahu Friday morning during routine beach monitoring. Levels of 1445 per 100 mL were detected.

Potentially harmful microorganisms such as bacteria, viruses, protozoa, or parasites may be present in the water.

DOH wrote in a statement, "Children, the elderly, and people with weakened immune systems are the most likely populations to develop illnesses or infections after coming into contact with polluted water, usually while swimming."

Symptoms of sickness due to swimming in water containing a high amount of bacteria include nausea, vomiting, stomachache, diarrhea, headache or fever.

The advisory will remain in effect until water sample results no longer exceed the threshold level of 130 enterococci per 100 mL.