If you just bought a Brainerd Lakes Area cabin, or inherited one, and nobody handed you a clear answer about what kind of system it’s on, here’s how to tell — from the yard, without digging anything up or waiting weeks for county records to arrive.
Standard in-ground system
The classic setup: a tank near the house, and a flat or gently sloped drainfield somewhere on the property, usually invisible at ground level beyond maybe a subtly different patch of grass. No raised mound, no separate lift-pump alarm panel mounted on the house or a nearby post. If your yard is flat and unremarkable and you’ve never noticed any electronic component tied to the system, this is the most likely setup.
Mound system
Look for a distinctly raised, grass-covered berm somewhere on the property — often several feet high and shaped like a long, low hill, not a natural landscape feature. There is almost always an electrical control panel or alarm box mounted on an exterior wall or a nearby post, since mounds depend on a pump to dose wastewater across the raised bed. If you’ve ever heard an alarm from an outdoor panel, or seen a small electrical box you didn’t recognize near the house, that’s a strong mound indicator. See our guide to why mound systems are so common here for the soil science behind why this is the default on much of the region’s lakeshore.
Holding tank
No visible drainfield or mound anywhere on the property — because there isn’t one. A holding tank is a sealed, non-discharging tank; everything that goes in has to be pumped out. The strongest tell is your pumping frequency: if you’re calling for service every few weeks or months rather than every few years, you’re very likely on a holding tank rather than a standard system. Many holding-tank properties also have a high-water alarm, similar to a mound’s, since an overflowing holding tank is a more urgent problem than a slowly filling standard tank.
When the answer isn’t obvious
Some properties combine elements, or the visible signs above are ambiguous — a partially overgrown mound can look like a natural rise, for instance. If you’re genuinely unsure after checking these signs, a records request at Crow Wing County Planning & Zoning (see our guide to finding your tank) or a straightforward question during your first pumping visit will settle it definitively.
Why this matters before you call for service
Knowing your system type before requesting service means you get matched to the right partner and a more accurate quote from the start — a routine pumping call for a holding tank should be priced and scheduled differently than the same call for a standard tank, and a mound alarm needs a technician equipped for pump and control diagnostics, not just a vacuum truck. See our quote request page where system type is one of the first things asked.
If you’re buying a property soon
System type is worth confirming before you close, not after — ask the seller directly, request any permit records through the county, or budget time during your inspection period to walk the property with these signs in mind. A holding tank in particular changes the ongoing cost of owning a property meaningfully enough that it’s worth knowing before you sign, not discovering with your first utility-style bill for pumping service that arrives far sooner than you expected.
Identifying Your Septic System Type FAQ
Can a property have more than one septic system type?
It’s uncommon but not impossible, particularly on larger or older properties that have been added onto over the years. If anything about your setup seems inconsistent with a single system type, mention that when requesting service.
Does the county have a record of what system type my property has?
In most cases yes, especially for systems installed or upgraded after organized permit recordkeeping began — a records request at Crow Wing County Planning & Zoning is the most reliable way to confirm.
Is one system type better than another?
Not inherently — each is a response to specific site conditions like soil, water table depth, and lot size. The right system for a property is the one its site and soil evaluation calls for.
