G R O U N D W A T E R
Ground water is surface and storm water that infiltrates into Island aquifers where it is temporarily stored, supporting summer time flow to streams, wetlands, ponds, and lakes, and ultimately used for drinking water by Island residents. Septic system effluent also infiltrates through drainfields and becomes groundwater. Excess use of ground water can pose the risk of dry wells and salt water intrusion.
The CWU funds efforts to monitor and evaluate ground water quality and quantity in support of integrated water management. San Juan County Environmental Health protects public health by ensuring all drinking water and septic systems are managed properly. The two departments work together to ensure these services.
RESOURCES
Lopez - Salt water intrusion monitoring
All applicable islands - Class B water systems monitoring for water conservation and quality