United Site ServicesSeptic service company in Antioch, CA

United Site Services is ranked #5 of 16 septic service companies in Antioch 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.

United Site Services is open Monday to Saturday. Its listed hours are Monday to Friday, 7 AM – 8 PM; Saturday, 8 AM – 4:30 PM. On Saturdays it is open 8 AM to 4:30 PM and closed on Sundays. Hours come from the business listing; holiday hours may differ.

Serves Antioch and 11 towns within 25 miles: Oakley, Brentwood, Pittsburg, Clayton, Bay Point, Discovery Bay, Rio Vista, Concord, Blackhawk, Pleasant Hill and Waldon. 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.

United Site Services has a rating of 4.2 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 United Site Services on (800) 864-5387. The business is at 2625 E 18th St, Antioch, CA 94509. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.