Septic vs Sewer in Marion County, FL

By the Marion County Septic Editorial Team Reviewed June 2026

Marion County is one of Florida's most septic-dependent counties, with roughly 90,000 homes on onsite systems. At the same time, the county is expanding central sewer in priority areas to protect the springs. This guide explains the split, what septic-to-sewer conversion means for owners, and how to tell what serves a property.

How septic-dependent is Marion County?

Heavily. Roughly 90,000 homes in the county rely on septic systems, a reflection of decades of rural and exurban growth on land that central sewer never reached. As the Ocala metro keeps growing, new homes continue to go in on septic across the unincorporated county.

Why the county is expanding sewer

The driver is water quality. Septic systems contribute a meaningful share of the nitrogen reaching Silver Springs and Rainbow Springs, and a separate share of the nutrient load to Lake Weir. To address it, Marion County is running a multi-phase septic-to-sewer conversion program, funded in part by American Rescue Plan Act dollars, with the Silver Springs Shores area as a stated top priority. Cities are investing too: Belleview is expanding its wastewater treatment plant explicitly to support Silver Springs BMAP goals.

Septic and sewer compared

General comparison. Specifics depend on your location and the applicable program.
Consideration	Septic	Central sewer
Up-front cost	Owner pays for the system	Connection and assessment fees
Ongoing cost	Periodic pumping and maintenance	Monthly sewer bill
Responsibility	The property owner	The utility
Availability	Most rural and acreage lots	Cities and priority conversion areas

What this means for you

If you are on septic and sewer is not coming soon, normal care and timely repair or replacement are the path. If you are buying, factor the septic system into the deal, as covered in our guide to buying rural property. If you need a drainfield replacement or a new system, tell us about your property and we connect you with a licensed local contractor for a free quote.

Sources and where to verify

Frequently asked questions

Is my Marion County property on septic or sewer?

Many properties, especially outside city cores and in rural areas, are on septic. The clearest way to confirm is to check with Marion County Utilities or the relevant city, or have a licensed contractor confirm during a visit. If you receive a sewer bill, you are on sewer; if not, you are likely on septic.

What is septic-to-sewer conversion?

It is the process of extending central sewer to an area currently on septic and connecting homes to it, often to reduce nutrient loading to the springs or a lake. Marion County is running a multi-phase program, funded in part by American Rescue Plan Act money, with Silver Springs Shores as a top priority.

Do I have to connect to sewer if it reaches my street?

It depends on local rules and the specific program. In some areas connection becomes mandatory within a set time after sewer is available. Check with Marion County Utilities for the requirements that apply to your address.

If sewer is years away, should I still replace a failed septic system?

Usually yes. A failed system is a health and property issue you cannot leave unaddressed, and waiting for a sewer project that may be years out is rarely practical. A licensed contractor can advise whether a repair, a replacement, or an interim option makes sense for your situation.