In Idaho, mains water is delivered by local public water systems, regulated by the Idaho Dept. of Environmental Quality (DEQ) under the US EPA Safe Drinking Water Act. Typical hardness: Generally moderately hard to hard (much from groundwater). For a specific ZIP, see the EWG Tap Water Database.
Supplier
Local public water systems
Regulator
Idaho Dept. of Environmental Quality (DEQ) · US EPA (Safe Drinking Water Act)
Hardness
Generally moderately hard to hard (much from groundwater)