New Septic System Installation in Marion County
Septic system installation in Ocala and Marion County now means, in most places, an ENR (enhanced nutrient-reducing) system on any lot size, permitted by Florida DEP. Florida Septic Works connects Ocala and Marion County homeowners and builders with independent local septic companies for free, no-obligation installation quotes.
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What’s included in a new septic system installation
- Site evaluation and design. DEP or a private site evaluator assesses the soil and water table, and the system is sized to the home.
- DEP permit application. Form DEP 4015 with a site plan and floor plan, filed through DEP’s online portal; fees include a $100 application and $115 site evaluation.
- Tank sized by bedrooms. Rule 62-6.008 sets minimums of 900 gallons for 1–3 bedrooms, 1,050 for 4 and 1,200 for 5, multi-chambered with an outlet filter.
- ENR treatment and drain field where the BMAP requires it (most of the county).
- DEP inspection before the system is covered and approved.
Florida Septic Works connects Ocala and Marion County homeowners with independent local septic companies for free, no-obligation quotes. Florida Septic Works is a referral service, not a septic tank contractor; the work is done by independent DEP-registered septic tank contractors, who quote, contract and do the job.
ENR septic system installation rules in Ocala & Marion County
Marion’s ENR rule is stricter than the state’s. Statewide, HB 1379 (July 1, 2023) requires ENR for new systems on lots of 1 acre or less in BMAP areas where sewer isn’t available. Marion goes further: the Silver Springs and Rainbow Springs BMAP (final order June 27, 2025; final and effective April 27, 2026) requires ENR, at least 65% nitrogen reduction, for new systems on any lot size. DEP’s August 2026 table lists this as of July 27, 2026. Most of Marion County is inside the BMAP; confirm your parcel on DEP’s map. Marion Oaks may be partly outside. Where sewer is available, a new septic system is not allowed at all (s. 373.811(2)).
Why the springs matter. The 2025 BMAP attributes 32% of the nitrogen load to Silver and Rainbow Springs to septic systems. Marion’s deep sands let effluent reach the aquifer quickly.
DEP septic permit and the building permit. Since July 1, 2025, Florida DEP’s Onsite Sewage Program permits septic systems in Marion County; apply at osp.floridadep.gov (Marion staff: [email protected], 850-245-8362). Marion County Building Safety issues building permits. Under a 2026 state law (HB 589) a single-family builder may be able to get the building permit with proof of a septic permit application, building at their own risk until the septic permit issues; confirm the current process with the county. See the Florida septic permits guide.
Prefer to talk it through? Call (727) 300-6656
ENR system types and ATU maintenance
DEP-approved ENR types are in-ground nitrogen-reducing biofilters (INRBs), NSF 245 nitrogen-reducing aerobic treatment units (ATUs) and nitrogen-reducing performance-based treatment systems. An ATU comes with ongoing duties: Florida law requires a maintenance agreement with a DEP-permitted maintenance entity that inspects the unit at least twice a year, plus a DEP operating permit ($100 every two years). The ENR septic requirements guide explains the rules in full.
What a new septic system costs in Marion County
| Item | Typical range |
|---|---|
| Aerobic / nitrogen-reducing (ENR) system, Florida | about $15,000–$35,000 or more |
| New conventional system (national) | $3,000–$8,000 (not allowed for new systems in Marion’s BMAP) |
| DEP fees (government) | application $100 + site evaluation $115; permit $55; inspection $75; $5 surcharge |
Typical ranges from Fixr (Jan 2025), HomeAdvisor (June 2026), homeyou Ocala (Sept 2026) and Florida Realtors (Sept 2026) — estimates, not quotes.
See the septic system installation cost guide and the ENR septic system cost guide.
Prefer to talk it through? Call (727) 300-6656
Signs you need a new septic system
- You are building on a lot with no sewer available.
- You are adding a separate home or structure that needs its own system.
- An old system has failed beyond repair and must be replaced (a repair permit in the BMAP also triggers ENR; see drain field repair).
Service Areas in Marion County for Septic System Installation
Installation quotes are available across the county. The Marion part of The Villages is on central sewer; its Sumter part is permitted by DOH-Sumter.
- Ocala
- Belleview
- Dunnellon
- Silver Springs
- Summerfield
- Citra
- Anthony
- Reddick
- Fort McCoy
- Ocklawaha
- Marion Oaks
- The Villages
See every town on the Service Areas in Marion County page.
Prefer to talk it through? Call (727) 300-6656
Septic system installation FAQs
Do I need an ENR septic system for a new home in Marion County?
In most of the county, yes. The Silver Springs and Rainbow Springs BMAP requires a nitrogen-reducing (ENR) system achieving at least 65% nitrogen reduction for new systems on any lot size inside the BMAP; DEP’s August 2026 table lists this as of July 27, 2026. Confirm your parcel on DEP’s BMAP map.
Who issues septic permits in Marion County?
Florida DEP’s Onsite Sewage Program, since July 1, 2025, not the county health department. Apply online at osp.floridadep.gov, or email Marion staff at [email protected] or call 850-245-8362. Building permits still come from Marion County Building Safety; ask the county how the septic permit fits into its building-permit process.
What size septic tank do I need in Florida?
Under Rule 62-6.008, the minimum is 900 gallons for 1–3 bedrooms (up to 2,250 sq ft), 1,050 gallons for 4 bedrooms and 1,200 gallons for 5. Where bedrooms and floor area point to different sizes, the larger estimated flow applies. Tanks must be multi-chambered with an outlet filter.
How much does a new septic system cost in Marion County?
Because most new systems in the county must be ENR, plan around Florida Realtors’ estimate of about $15,000–$35,000 or more. DEP fees are extra, including the $100 application, $115 site evaluation and $55 permit. These are estimates, not quotes; get written quotes.
Is there a rebate for ENR septic systems in Marion County?
No open ENR rebate in Marion County could be verified (checked October 2026). DEP’s Septic Upgrade Incentive Program, which paid up to $10,000 to installers, stopped taking applications, and DEP says it is working with Marion on a county program. Rebates in other counties do not apply here.
Get a free septic quote
Share your lot location, number of bedrooms and whether sewer is nearby. An independent local septic company will follow up with a written quote. This is general information, not legal advice.
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