Recommended Distance, feet

Potential Source of Contamination

10

Neighboring property line
Building
Home

50

Animal shelter or corral
Cistern, feed storage
Plastic silage storage tube (ag bag)
Silo with concrete sealed floor
Filter strip
Building sewer drain

100

Fuel oil/gasoline storage tanks
Manure storage
Liquid tight pesticide/fertilizer storage facilities
Streams or watercourses
Other sources of water supply
Septic tanks and leachfields

150

Springs or wells not sealed to first 50 feet of depth
Septic system leachfields greater than three feet below the surface of the land

250

Liquid animal waste disposal systems
Stacked animal wastes
Wastes in earthen or excavated storages, including trenches or pit silos