Hawaiʻi Beach Water Quality Monitoring

Displays sites where coastal water quality measurements are sampled by the Beach Monitoring Quality Assurance Program of the State of Hawaiʻi Department of Health (DOH) Clean Water Branch (CWB). Measurements of bacteria levels (Enterococcus and Clostridium perfingens) are used to assess water quality. These and other water measurements (temperature, salinity, pH, etc.) are collected periodically at several beaches throughout the state.

caution: One of the limitations of all available and EPA-approved test methods is that the water sample must be incubated for about 24 hours. As a result, an alert status may or may not be reflective of actual water quality because it is based on tests performed one or more days ago.

time period: roughly weekly or monthly, depending on the beach.