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The Washington State Department of Ecology regulates well drilling for both individual and public water systems.
See information regarding groundwater monitoring and surface water studies.
Any test which is marked unsatisfactory or unsuitable indicates an immediate need to evaluate and / or disinfect your water system.
Whether a private well serves one home or a public water system serves an entire neighborhood, it needs maintenance and testing to continue producing safe water.
A well log is a form completed by a well driller when a well is drilled, and submitted to the Washington State Department of EcologyWell symbol.