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Well water covenants

Private well

Group B water system

The Washington State Department of Health permits all new Group B water systems.

King County requires all water systems serving two or more parcels to be permitted as a Group B public water system. The Washington State Department of Health will permit a Group B water system to support two parcels by designing the system for four connections (two connections for each parcel). This will allow each property the option of one connection for the main residence and a second for an accessory dwelling unit or provide an additional connection for a neighboring property in the future.

For Group B water systems originally permitted by King County, historic records are maintained at the Eastgate Office. Please note, they are filed by water system name.

Miscellaneous forms

Additional resources and fact sheets

Treatment of arsenic found in drinking water is complex and it cannot be removed by simply boiling water. While methods for removing arsenic from water are available, the effectiveness of each method depends on the chemistry of the water being treated.

Groundwater chemistry varies across King County, therefore, the effectiveness of arsenic treatment methods can also vary. It is recommended to test your well water for the presence of arsenic to ensure that it is below the maximum contaminant level of 10 parts per billion (ppb). Ingestion of higher levels of arsenic in drinking water can be detrimental to health.