Well locations.
Municipal Code of Chicago § 18-29-608.17.1
in effect18-29-608.17.1 Well locations.
A potable ground water source or pump suction line shall not be located closer to potential sources of contamination than the distances shown in Table 18-29-608.17.1. In the event the underlying rock structure is limestone or fragmented shale, the local or state health department shall be consulted on well site location.
Table 18-29-608.17.1
Distance from Sources of Contamination to Private Water Supplies and Pump Suction Lines
Source of Contamination | Distance (feet)
Source of Contamination | Distance (feet)
Barnyard | 100
Farm silo | 25
Pasture | 100
Pumphouse floor drain of cast iron draining to ground surface | 2
Seepage pits | 50
Septic tank | 25
Sewer | 10
Subsurface disposal fields | 50
Subsurface pits | 50
For SI: 1 foot = 304.8 mm.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2691845Fetched: 10/24/2026