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This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.
Seller Water Type
From the help published with Drinking Water Watch 3.5, reproduced as delivered.
Seller Water Type categorizes the water sold by a water system. Permitted entries include groundwater (GW), groundwater under the direct influence (GUI) of surface water, and surface water (SW).