A sanitary setback is a 50–200 foot radius around a well, spring, or surface water intake where constructing or maintaining sources of contamination is prohibited. These sources include, but are not limited to, septic tanks and drainfields, sewer lines, underground storage tanks, vehicles, structures where toxic materials are used or stored, livestock enclosures, or garbage of any kind. Under the “Idaho Rules for Public Drinking Water Systems” (IDAPA 58.01.08), public water systems are required to meet minimum setbacks only for certain contaminants.