Groundwater Management Program

2017 Highlights and Accomplishments (DOC)

Availability & Sustainability

Groundwater is the sole source of drinking water on Bainbridge Island. Therefore, it’s essential to have a thorough understanding of the island’s complex aquifer system through scientific study and long-term monitoring.

At present, the city collects monthly water level data and annual chloride measurements.

Water level data is used to help assess the quantity of water in different aquifers. Chloride data is an indicator of seawater intrusion which occurs when saltwater intrudes into fresh water supplies.

Woman Monitoring Water


Groundwater Monitoring Program Early Warning Level Assessment - 2017 (PDF)

Sole Source Aquifer Designation

In 2013, Bainbridge Island Aquifer System was designated as a Sole Source Aquifer.