Advanced Septic Systems IncSeptic service company in Sedro-Woolley, WA

Advanced Septic Systems Inc is ranked #2 of 33 septic service companies in Sedro-Woolley by CR Score, with 55 out of 100 as of November 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

Serves Sedro-Woolley and 7 towns within 25 miles: Burlington, Mount Vernon, Sudden Valley, Anacortes, Bellingham, Stanwood and Arlington. The list is based on the business's location and the usual service radius for septic and sewer service. Confirm your address is covered when you call.

Advanced Septic Systems Inc has a rating of 5.0 from 5 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

Call Advanced Septic Systems Inc on (360) 856-0550. The business is at 8000 Parker Rd, Sedro-Woolley, WA 98284. Ask for a written estimate before any work starts.