Septic companies in Gilroy, CA

What the ground in Gilroy is like

The USDA soil survey rates mapped ground in Gilroy for septic drain-field suitability across roughly 17 square miles. About 89% of the rated ground is classed "Very limited", the survey records severe restrictions for a conventional drain field across most of that ground.

In Gilroy, the leading limit is slow water movement: effluent does not drain through the soil fast enough, so a conventional field can back up or pond when the ground cannot keep pace. The survey flags that limit on about 83% of the rated ground here.

The limiting features the survey records most often here:

• Slow water movement83.4%
• Flooding28.1%
• Slope27.5%
• Depth to bedrock26.4%

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 · 89.4% Very limited · Slow water movement · 55 map units · 16.58 sq mi · read 2026-08-30