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Septic Registry

Licensed septic companies in Mercer County, Missouri

11 businesses on Missouri’s septic licensing records give Mercer County as its address.

Licensed businesses based in Mercer County

Who handles septic permits in Mercer County

Missouri registers the individual installer and records the counties they serve. Your local health authority permits the system itself, and in some counties runs its own additional requirements on top.

How to verify a septic licence before you hire →

Licensed companies in neighbouring counties

A Missouri septic licence is valid statewide, so a company listed in an adjoining county can legally do the work in Mercer County.

Records as published August 26, 2026. A licence can lapse at any time — confirm with Missouri DHSS, or the state's own published registration data before hiring. Report a correction.