As of October 2026, The Septic Guide has matched 27,059 septic providers to license and certification lists published by 26 state agencies, out of 28,538 septic providers listed in 45 states. North Carolina (4,519), Georgia (1,983), Connecticut (1,903) have the most license-matched providers.
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Key numbers
28,538 septic companies and licensed septic professionals listed in 45 states.
27,059 matched to a state septic license or certification list.
26 state agency lists loaded into the directory.
26 states publish a list of septic license holders; in 12 states septic contractors are licensed only by counties or towns.
Match rate reflects how the directory was sourced from state rosters; it is not a compliance rate.
How to use these numbers
These are providers The Septic Guide matched, not official state totals: a state's own count of license holders can be higher (we keep only active credentials for holders based in the state) or include people we could not tie to a business. Counts are refreshed when each state publishes a new list. You may reuse this table with credit to The Septic Guide and a link to this page.