Setbacks

Setbacks

Onsite Wastewater Treatment Systems (OWTS) must maintain the setbacks shown in the following table.

Feature Tanks and Sand Filters (in feet) Absorption Fields (in feet)
Private Well** 50 100
Public Well 300 300
Cistern 25 50
Spring 50 100
Classified Stream*, Lake, etc. (typically wet) 50 50
Dry Stream, Open Ditch (often dry), or Road Ditch 25 25
Property Lines 10 10
Building Foundation 5 15
Basement 15 25
Swimming Pool 15 15
Water Main 10 50
Water Line (Under Pressure) 10 10
Water Line (Suction) 50 100
Upslope Interceptor Drains (Curtain Drain) -- 10
Downslope Interceptor Drains (Curtain Drain) -- 10
Top of Slope of Embankments or Cuts of Two Feet or More in Vertical Height -- 20
Edge of Surficial Sink Holes*** 50 100
Other Soil Absorption Systems except Repair Areas -- 20

*A classified stream is any stream that maintains permanent flow or permanent pools during drought periods and supports aquatic life.
**Unplugged abandoned wells or wells with a casing less than 80 feet deep shall have a setback of a minimum of 150 feet from fields and tanks.
***Tanks and fields cannot be located in the drainage area of a sinkhole.