Knight Septic Service LLCSeptic service company in Columbia, SC

Knight Septic Service LLC is ranked #2 of 20 septic service companies in Columbia by CR Score, with 60 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.

Knight Septic Service LLC is open 7 days a week. Its listed hours are Monday to Sunday, 9 AM – 5 PM. On Saturdays it is open 9 AM to 5 PM, and on Sundays 9 AM to 5 PM. Hours come from the business listing; holiday hours may differ.

Serves Columbia and 11 towns within 25 miles: Red Bank, Cayce, Oak Grove, West Columbia, Lexington, Saint Andrews, Seven Oaks, Forest Acres, Irmo, Dentsville and Woodfield. 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.

Knight Septic Service LLC has a rating of 5.0 from 45 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 Knight Septic Service LLC on (803) 459-0791. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.