Septic companies in South Portland, ME

What the ground in South Portland is like

The USDA soil survey rates mapped ground in South Portland for septic drain-field suitability across roughly 12 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 South Portland, 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 66% of the rated ground here.

The limiting features the survey records most often here:

• Depth to saturated zone66.1%
• Seepage, bottom layer57.7%
• Filtering capacity47.3%
• Slow water movement32.1%

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 · 99.8% Very limited · Depth to saturated zone · 48 map units · 12.05 sq mi · read 2026-08-30