Island County Public Health has a network of eleven (11) dedicated groundwater monitoring wells split between Whidbey Island and Camano Island. Beginning in 2007, Island County has used these wells to monitor for seawater intrusion and long-term fluctuations in static water levels.
In addition to the Island County Public Health wells, the Washington Department of Ecology currently maintains eight (8) nested monitoring well groups with up to four (4) piezometers per location. The nested wells were originally installed as a joint project with the United States Geological Survey in the late 1980s to evaluate aquifers serving Island County.
Monitoring well data is available on the Island County Hydrogeology Dashboard.
While not dedicated monitoring wells, drinking water wells serving Group A and Group B public water systems are another valuable source of long-term data collection for both water quality and static water levels in Island County.