Septic companies in Joliet, IL

What the ground in Joliet is like

The USDA soil survey rates mapped ground in Joliet for septic drain-field suitability across roughly 66 square miles. About 100% of the rated ground is classed "Very limited", meaning the soil has one or more features unfavorable for a conventional drain field, and the limits generally cannot be overcome without major soil reclamation, special design or expensive installation.

In Joliet, the leading limit is depth to the saturated zone: the water table sits so close to the surface that a drain field has little dry soil left underneath it. Effluent needs unsaturated ground to treat and disperse; when that column is thin, the field has nowhere safe to go. The survey flags that limit on about 88% of the rated ground here.

The limiting features the survey records most often here:

• Depth to saturated zone88.5%
• Slow water movement87.8%
• Ponding33.4%
• Seepage, bottom layer16.7%

This is survey data for mapped areas, not a substitute for a site evaluation on your own lot. Conditions on a single parcel can differ from the map.

USDA NRCS SSURGO, ENG Septic Tank Absorption Fields · 99.6% Very limited · Depth to saturated zone · 138 map units · 66.25 sq mi · read 2026-08-30