In rural areas, household drinking water is commonly obtained through private wells or surface water intakes, and is usually called a private or "domestic" water supply. Most homeowners know if they have a well on their property.
Most drinking water, particularly in urban areas, is obtained through public water systems that serve multiple homes or entire communities. These can be groundwater wells or surface water intakes (pipes drawing from streams and rivers). If a well or intake serves more than 3 homes or connections, it is regulated as a public water system in Oregon. If you get a monthly water bill, the name and telephone number of your water system operator should be on the bill. Call this number for more information on the source of your drinking water. You can also access information on the water system using the Oregon Health Authority Drinking Water Program’s online database. (See “Drinking Water Data Online” and use the water system “WS Name Lookup” feature to find your water system.)
If you're a renter and don't receive a water bill, call your landlord for the water system operator's name. Other potential sources of information about your water include DEQ’s interactive map viewer, your local county health department, your local Oregon Water Resources Department watermaster district office at 503-378-8455, or the OHA Drinking Water Program at 971-673-0405.