The results of 43 samples taken by the Guam Environmental Protection Agency on May 22, 2025, identified that the following two recreational waters were polluted above the accepted bacteriological standards

Hågat 

North of Hågat Marina, south of Chaligan Creek

Hagatna 

Hagåtña Bayside Park

Jellyfish Calendar - Next Predicted dates

Jun 18 to Jun 21

Swimming, fishing or playing in unsafe waters may result in minor illnesses such as sore throats or diarrhea. It may also result in more serious illnesses such as meningitis, encephalitis, or severe gastroenteritis. 

Children, the elderly and people with weakened immune systems have a greater chance of getting sick when they come in contact with contaminated water.