Napa Septic Tank Service, Inc.Septic service company in Napa, CA

Napa Septic Tank Service, Inc. is ranked #10 of 32 septic service companies in Napa by CR Score, with 53 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.

Napa Septic Tank Service, Inc. is open Monday to Friday. Its listed hours are Monday to Friday, 8:30 AM – 3:30 PM. It is closed on Saturdays and closed on Sundays. Hours come from the business listing; holiday hours may differ.

Serves Napa and 11 towns within 25 miles: American Canyon, Sonoma, Boyes Hot Springs, Vallejo, Fairfield, Suisun, Vacaville, Saint Helena, Rodeo, Benicia and Hercules. 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.

Napa Septic Tank Service, 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 Napa Septic Tank Service, Inc. on (707) 224-1748. The business is at 511 Silverado Trail, Napa, CA 94559. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.