Every septic system in America was permitted by a government agency. That paperwork exists — it's just scattered across thousands of county offices, PDF scans, and GIS portals. TankFindr brings it into one search box.
Roughly one in five American homes runs on a septic system — and most owners have no idea where their tank is. Finding out the old way means calling the county and waiting days for records, paying $100–$200 for a professional locate, or probing the yard with a metal rod and hoping.
We built TankFindr in 2024 to make that answer instant. We aggregate millions of government septic records, geocode them, and put them behind a single address search — so homeowners, home inspectors, realtors, and septic companies can find tanks in seconds instead of days.
Florida DEP / DOH OSTDS databases
Statewide onsite sewage treatment and disposal system records, including permit applications, approvals, and the state septic inventory.
County health departments
Permit records and as-built drawings from county environmental health offices, including Fairfax County (VA), Sonoma County (CA), and dozens of Florida counties.
State GIS and environmental agencies
Geographic data layers published by state agencies, including New Mexico statewide records and county GIS systems.
See exactly which counties and states are covered — including record counts and data quality — on our coverage page.
Government records are imperfect — some are decades old, some were digitized from paper, and some locations were estimated by the agencies themselves. Most data companies hide that. We label it.
Verified
Backed by an official permit record with a permit number
Inferred
Calculated from verified data (e.g. tank size from permitted capacity)
Estimated
From state inventory data — useful signal, lower precision
Every report tells you which tier each data point belongs to — and our free preview shows you whether we have records for your address before you pay, so you always know what you're getting.
Verified permit locations are typically accurate to within 10–20 feet — close enough to put a shovel in the right part of the yard, not a guarantee of the exact lid position. Always confirm with a probe or professional locate before excavation, and call 811 before any digging. TankFindr gets you to the right spot in seconds; it doesn't replace eyes on the ground.
$29 per report • Instant access • Downloadable PDF