A1 Septic ServiceSeptic service company in Marysville, WA

A1 Septic Service is ranked #2 of 93 septic service companies in Marysville by CR Score, with 64 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.

A1 Septic Service is open 24 hours a day, 7 days a week. Its listed hours are Open 24 hours, 7 days a week. On Saturdays it is open Open 24 hours, and on Sundays Open 24 hours. Hours come from the business listing; holiday hours may differ.

Serves Marysville and 9 towns within 25 miles: Woods Creek, Lake Stevens, Monroe, West Lake Stevens, Snohomish, Arlington, Everett, Duvall and Silver Firs. 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.

A1 Septic Service has a rating of 4.9 from 121 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 A1 Septic Service on (425) 231-3454. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.