Septic companies in Shelton, WA
Two septic companies on record in Shelton, Mason County. About 97% of mapped ground here is rated Very limited for septic drain fields, with filtering capacity the limiting feature.
What the ground in Shelton is like
The USDA soil survey rates mapped ground in Shelton for septic drain-field suitability across roughly 6.5 square miles. About 97% of the rated ground is classed "Very limited", the survey records severe restrictions for a conventional drain field across most of that ground.
In Shelton, the leading limit is filtering capacity: the soil does not clean effluent thoroughly enough on its way through. A drain field is a treatment system as well as a disposal path; when the ground cannot filter well, pathogens and nutrients travel farther than the survey allows. The survey flags that limit on about 69% of the rated ground here.
The limiting features the survey records most often here:
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 · 96.5% Very limited · Filtering capacity · 20 map units · 6.47 sq mi · read 2026-08-30
The two companies
- 30AAA Septic LLCLicense unverified(360) 427-6110
- 15B-Line Construction, Inc.License unverified(360) 426-4221