Sanford ATU Installation

What Is an ATU?

Aerobic treatment units were designed to function as a miniature sewage treatment plant for a single property. ATUs break down sewage by introducing oxygen into the treatment chamber, which supports aerobic bacteria that digest waste faster than the anaerobic bacteria in a conventional tank. The result is cleaner, treated effluent that can be suitable for surface irrigation. That higher-quality output allows for a smaller drain field and makes ATUs a practical solution for properties that aren’t connected to a public sewer.

Why Would a Property Need an ATU?

• Adverse soil conditions – Rocky, clay-based, or minimal topsoil can prevent a conventional system from functioning. ATUs don’t depend on the same soil absorption, making them a practical fit for properties where a traditional drain field won’t work.
• No municipal sewer connection – ATUs provide effective on-site wastewater treatment for homes and businesses that aren’t connected to a public system.
• Cleaner effluent – Aerobic bacteria break down organic matter more completely than anaerobic bacteria, producing cleaner output and reducing the biological load on the drain field.
• Extended drain field life – Because the effluent entering the drain field is cleaner, the field can last longer than it might with a conventional system.

Our ATU Installation Process

Consultation & Planning

ATU installation requires a permit from the Florida Department of Health in Seminole County. A member of our team handles this step before installation begins, so you don’t have to navigate the permitting process on your own. Once the permit is approved, we’ll talk through your expectations, any relevant environmental factors, project costs, and your preferred location for the system.

Site Preparation

We start with a percolation test to assess your soil’s water absorption capacity. From there, we identify a location that maintains safe setback distances from underground electrical and sprinkler systems and is clear of plants or vegetation that could interfere with the system. Once the site is confirmed, measurements are taken to guide excavation, accounting for the chamber, electrical components, and pipe routing.

Professional Installation

Our technicians use commercial construction vehicles to excavate the site and create the space where your ATU will sit. Once the unit is lowered into place, we assemble the pipes and electrical networks. When every component is set, we move into testing.

System Testing & Finalization

We test the system for proper functionality by checking dissolved oxygen levels, microbial activity, and effluent quality. Once everything passes, any soil, grass, or sod removed during excavation is replaced. Your ATU is ready for service.

How to Maintain an ATU

• Pump the tank every 2 to 3 years – Regular pumping prevents clogs and sewage backups, both of which are expensive and disruptive to fix. Don’t skip this one.
• Act on alarm signals right away – A continuously sounding audible alarm or a constantly lit visual alarm is a warning that needs prompt attention. Contact us if your ATU’s motor isn’t running properly. Catching it early can help prevent raw sewage discharge and the environmental and public health risks that come with it.
• Keep plants and vegetation clear of the ATU site – Before installation, we make sure the site is clear of ground cover and root systems. After installation, avoid planting trees, shrubs, or other plants within an unsafe distance of the unit. Roots can damage the system and block access when service is needed.
• Check ATU lids regularly – A cracked or damaged lid disrupts proper aeration and can allow debris into the tank, leading to clogs or malfunction. If you notice any damage, contact us for a repair.

Florida ATU Operating Permit and Maintenance Contract Requirements

Installing an ATU isn’t a one-time transaction. Florida law requires ATU owners to maintain a current operating permit with the county health department for the life of the system. In Seminole County, those permits are managed by the Florida Department of Health in Seminole County, and letting one lapse can result in a violation.

Florida also requires ATU owners to maintain a valid maintenance contract with an approved provider at all times. The initial contract following new construction must run for at least two years, with annual renewals required after that. Under those contracts, the provider must inspect and service the system at least twice per year and submit reports to the county health department.

When a property with an ATU changes hands, the new owner must establish their own maintenance contract to keep the system in compliance. These aren’t optional steps. They’re conditions of owning and operating an ATU in Florida, and staying current on both the permit and the service contract can help protect you from enforcement actions down the road.

Florida BMAP Regions and What They Mean for Sanford Homeowners

Florida has an enormous amount of groundwater stored in the Floridan Aquifer, which underlies the Sanford and Central Florida region. Conventional septic systems aren’t designed to filter nitrogen effectively, and over time, that nutrient load can work its way into groundwater and surface water, degrading water quality in the basins above.

Florida’s Department of Environmental Protection identified specific water basins where nutrient pollution poses a measurable threat and created a Basin Management Action Plan (BMAP) for each one, outlining the actions required to restore water quality. The Sanford and Seminole County area falls within the Lake Harney, Lake Monroe, Middle St. Johns River, and Smith Canal BMAP. It is one of the designated zones where the state has identified nutrient reduction as a priority. In areas like this, Florida regulations may require homeowners building new or replacing a failing system to install a nitrogen-reducing system, such as an NSF/ANSI 245-certified ATU, rather than a conventional septic tank.

If you’re unsure whether your property falls within a regulated zone, the Florida Department of Health in Seminole County or the Florida DEP BMAP resources can help you confirm your parcel’s status.