You can't maintain what you can't find. On older Monrovia lots, the septic tank location is often a mystery — the previous owner didn't know, the county record is a hand-drawn sketch from 1962, and the lids are buried under a foot of hillside fill or a patio poured decades later. Every pumper who visits has to guess, and guessing means your tank might not have been fully pumped in years.
Our locating service finds the tank and drain field with electronic locators, probing, and drain-line tracing — without tearing up your yard. Once found, we map every component, mark the lids, and give you a record you can keep with the house. We can also install risers to grade so the lids never get lost again.
If you're buying a home and nobody can point to the tank, if your pumper keeps 'finding' a different spot, or if you just want to know where your system actually is — call. It's a small job that answers a big question.
Signs you need your tank located
- Nobody — not you, not the previous owner — knows where the tank is
- County records show a location that doesn't match your lot
- Your pumper pumps 'the tank' but you're not sure they found it
- You need a real estate disclosure or inspection report with the system mapped
- Landscaping or a patio was built over the suspected tank area
- You're planning construction and need to avoid the system
How we find your tank
1 Trace from the house
The sewer line leaves the house at a predictable point, so we start there — electronic line tracing follows the pipe from the foundation to where it meets the tank. This works even when the tank is buried deep under fill.
2 Confirm with probing
Once the line trace points to a spot, we probe to confirm the tank's edges and lid locations. We verify before we dig — the goal is a small targeted hole, not exploratory excavation across your yard.
3 Map the whole system
With the tank found, we trace the outlet to the distribution box and map the drain field lines too. You get the full system layout, not just the tank — which is what matters for construction, inspections, and future work.
4 Mark it permanently
We mark the lid locations and can install risers to grade so they're visible and accessible from now on. Your next pumper, your buyer, and your inspector will all thank you.
Lost tanks on Monrovia's older lots
Monrovia's older foothill and north-side lots are ground zero for lost tanks. Systems installed in the 1950s through the 1970s often went in before risers existed, and decades of grading, landscaping, patio pours, and hillside fill have buried lids a foot or more deep. County records for these lots are frequently wrong — a sketch from the original permit that doesn't match what's in the ground, or no record at all. We've located tanks under driveways, under garden beds, and once under a detached garage that went up after the tank. On these lots, 'we've always pumped from the lid by the oak tree' is worth verifying.
Need tank locating in Monrovia?
One call connects you with a local technician. No forms, no waiting.
