Lake Leelanau is more than a body of water. It is memory and meaning. It is early mornings when the mist rises like a breath, afternoons of children leaping from docks, the quiet rhythm of loons at dusk. For many of us, this lake is where we feel most at home—where generations have gathered, where time seems to slow, where nature still feels close enough to touch. Protecting it is not an abstract responsibility. It is deeply personal.
Yet beneath the surface of this beautiful place, a quiet threat grows when septic systems are neglected. Failing or poorly maintained systems release nutrients and bacteria into the groundwater, which eventually make their way into the lake. These pollutants feed harmful algae blooms, cloud once-clear waters, and rob the lake of oxygen. What begins unseen underground can end in murky water, fish kills, and beaches closed to the very families who cherish them.
For homeowners, septic systems are easy to forget—out of sight, out of mind. But they are one of the most direct ways our daily lives touch the lake. Every shower, every load of laundry, every dish washed passes through a system that, if properly cared for, quietly does its job. When it isn’t maintained, the cost is not just mechanical or financial; it is environmental, communal, and lasting.
Lake Leelanau is especially vulnerable. Its long, narrow shape and slow water exchange mean pollutants linger. Once water quality declines, recovery can take decades. By the time the damage is obvious, it is often already too late to reverse without enormous effort and expense. What we do now—this year, this season—matters more than we may realize.
How to Become a Septic Detective
Septic system maintenance is a frequent topic in our newsletter—and for good reason. A properly functioning septic system plays a critical role in protecting lake water quality. Today, we invite you to get to know your septic system a little better so you can care for it with confidence.
I began my own septic system “detective work” by searching for permitting records on the Benzie–Leelanau Health Department’s online portal. By selecting your township and then clicking through file folders that match the beginning numbers of your parcel ID, you can eventually locate a file containing decades of permitting documents. Don't have your parcel ID handy? You can find your property and parcel ID on the Leelanau County Government website here. Our property’s file included 15 pages of applications, drawings, inspection reports, and historic correspondence—a fascinating (and sobering) look into the past.
Our property was originally developed in 1944, when septic systems were often homemade and, in many cases, unpermitted. Historic records revealed a system made up of two dry wells, a tank handling kitchen wastewater with a small stone drain field, and another tank collecting bathroom waste with its own stone drain field. All of this infrastructure sat between the house and the lake. Even more concerning was how close it was to neighboring wells—especially since many wells in the area are only about 30 feet deep.
As I continued reviewing the records, I found a permit application from 2008, submitted prior to demolishing the original home. The plan was to install a modern septic system that met current regulations. Unfortunately, the application was denied due to soil conditions and hydrology. The only viable option was the installation of holding tanks.
Be a Septic Detective
- What's the age of your septic system?
- Where are your septic tanks and drain field?
- When was your septic system last inspected and pumped?
- How deep is your well and where is it?
In 2010, three 1,200-gallon holding tanks and a pump-up tank were installed on the back side of the property, complete with alarms and flashing lights to indicate when they’re full.
Knowing the age of your septic system is one of the most important clues to its overall health. Septic systems typically last between 15 and 40 years, depending on soil conditions, usage, and maintenance. If your system is approaching the upper end of its lifespan—or if you’re a new homeowner—it’s wise to have it inspected. Septic systems are expensive to repair or replace, making thoughtful use and regular maintenance essential.
Tips to Keep Your Septic System Working Well
Many everyday household items can either clog your system or harm the beneficial microbes that treat wastewater.
Avoid “Cloggers”:
Diapers, baby wipes (even “flushable” ones), cat litter, cigarettes, coffee grounds, grease, and feminine hygiene products.
Avoid “Killers”:
Household chemicals, gasoline, oil, pesticides, antifreeze, paint, and excessive use of antibacterial soaps and detergents.
Don’t strain your drain:
Use less water whenever possible. Stagger appliance use, install high-efficiency fixtures, and fix leaks promptly.
Shield your field:
Keep vehicles and heavy equipment—anything heavier than a lawnmower—off your drainfield.
Limit garbage disposal use:
Reducing or eliminating garbage disposal use cuts down on fats, grease, and solids that can clog your system.
Plant wisely:
Keep trees and deep-rooted plants away from the drainfield to prevent root damage. Learn more here.
Manage excess water:
Direct irrigation, roof runoff, and other sources of excess water away from the drainfield.
A little knowledge goes a long way. Understanding your septic system helps protect your investment, your neighbors’ drinking water, and the lake we all care about.
Take Responsibility for Your Septic System
Maintaining a septic system is an act of stewardship. Regular inspections, routine pumping, mindful water use, and prompt repairs are not just household chores. They are commitments to the health of the lake and to one another. They are promises to the children who will swim here next summer and to the grandchildren who deserve to see the same clear waters we did.
There is also a sense of shared responsibility that binds lake communities together. No single homeowner can protect Lake Leelanau alone, and no single failure happens in isolation. Water connects us. What seeps from one property doesn’t stay there—it moves, it spreads, it affects neighbors and wildlife alike. Caring for your septic system is a way of caring for the entire community.
This is not about blame or fear. It is about love for a place that has given so much. It is about recognizing that preservation does not happen by accident. It happens because ordinary people choose to do the right thing, even when it is inconvenient, even when no one is watching.
Lake Leelanau’s future depends on countless small decisions made by homeowners who understand what is at stake. By maintaining your septic system, you are choosing clear water over algae, life over decline, legacy over neglect. You are choosing to protect the lake not just as it is today, but as it can be for generations to come.
The lake has always been there for us. Now, quietly and urgently, it is asking us to be there for it.