Septic companies in Gig Harbor, WA

What the ground in Gig Harbor is like

The USDA soil survey rates mapped ground in Gig Harbor for septic drain-field suitability across roughly 5.9 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 Gig Harbor, 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 90% of the rated ground here.

The limiting features the survey records most often here:

• Slow water movement89.8%
• Slope82.4%
• Depth to saturated zone79.1%
• Seepage, bottom layer10.0%

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 · 88.7% Very limited · Slow water movement · 21 map units · 5.9 sq mi · read 2026-08-30