Well Drilling in Central Florida: Everything You Need to Know Before You Dig

Drilling a well is one of the most significant investments a Central Florida property owner can make — and one of the most consequential for long-term water quality and property value. Whether you're on a rural parcel in Marion County where city water isn't available, or choosing to add a well to a Lake County property for irrigation, understanding the process before you hire a contractor saves money and prevents problems.

Central Florida's Hydrogeology: Why It Matters for Your Well

Central Florida sits atop the Floridan Aquifer System, one of the most productive aquifer systems in the world. But the aquifer isn't a single underground lake — it's a complex series of permeable limestone and dolomite formations, separated by confining units that restrict water movement between layers.

In Lake and Marion counties, three primary water-bearing zones are accessible to residential wells:

Surficial Aquifer (10–50 feet deep): This shallow zone is recharged directly by rainfall. It's the cheapest to reach but most vulnerable to contamination from surface activities, septic systems, fertilizers, and pesticides. Not recommended for drinking water in agricultural areas.

Intermediate Aquifer (100–500 feet): Found beneath a confining clay layer in central Florida. Provides better protection from surface contamination but variable water quality and yield depending on exact location.

Upper Floridan Aquifer (300–1,000+ feet): This is the primary drinking water source for most Central Florida homes. Protected by multiple confining layers from surface contamination, it delivers consistent quality and good yields — typically 10–50 gallons per minute for properly designed residential wells.

Your contractor should perform a geologic analysis of your specific property to determine target depth and expected yield before drilling. This is not optional — drilling blind is how homeowners end up with dry holes or wells that require expensive deepening.

Florida Well Permitting: What's Required

In Florida, all water wells must be permitted through the relevant Water Management District. Central Florida falls under the jurisdiction of the St. Johns River Water Management District (SJRWMD) for eastern areas and the Southwest Florida Water Management District (SWFWMD) for western areas, depending on county.

Required before drilling:

• Water Use Permit (for non-potable wells used for irrigation over 100,000 gallons per day) or domestic supply well permit
• Well completion report submitted within 30 days of drilling
• Contractor must hold a Florida Water Well Contractor License (C-13)

Hillsborough, Marion, and Lake counties also require local permits in addition to district permits. The contractor should handle all permitting — be wary of any driller who suggests skipping permits to save time or money. Unpermitted wells cannot be sold with a property and may require expensive retrofitting or abandonment.

What to Expect During Drilling

Modern rotary drilling equipment can drill through Central Florida's limestone formations at 50–100 feet per hour, depending on rock hardness and formation variability. A typical residential well reaching the Upper Floridan Aquifer at 400–600 feet in depth takes 1–3 days to drill, case, and complete.

The drilling sequence:

1. Surface casing installation: Steel casing is driven 20+ feet into the ground before drilling begins, protecting the top of the well from surface water infiltration
2. Drilling to target depth: Rotary drill bit advances through soil, clay, and limestone formations
3. Well development: The well is pumped aggressively to clear drilling fluids and sediment from the formation — this step determines whether the well will deliver clean water long-term
4. Well testing: Yield testing determines gallons per minute; water quality sampling establishes baseline chemistry
5. Well seal: Grouting the annular space between the casing and borehole wall prevents surface water infiltration
6. Pump installation: Submersible pumps are installed at the appropriate depth for your well's water level and yield

Typical Costs for Central Florida Wells

Residential well costs in Lake, Marion, Alachua, and surrounding counties (2025-2026 pricing):

• Shallow well (100–200 feet, surficial/intermediate aquifer): $5,000–$12,000
• Deep residential well (300–600 feet, Upper Floridan Aquifer): $8,000–$20,000
• High-yield agricultural well (600–1,000 feet): $15,000–$40,000+
• Pump and pressure tank system: $1,500–$4,000 (in addition to drilling)
• Permitting and testing: $300–$800

Price drivers include drilling depth, rock hardness (limestone variability is significant in Central Florida), casing material and diameter, and local contractor demand. Get at least three bids from licensed contractors — price variation of 20–40% is common for identical work.

Water Quality in Central Florida Wells

Upper Floridan Aquifer water in Central Florida is typically hard (5–15 GPG), with naturally occurring hydrogen sulfide (rotten egg odor) common in many areas, particularly in Marion and Citrus counties. Iron is common at concentrations of 0.3–5.0 mg/L. Tannins from organic decay affect some surficial wells with a yellow-brown tint.

Plan for a water treatment system when drilling a new well. The combination of hardness, iron, and hydrogen sulfide is nearly universal in the region — and all three are very treatable with proper system design.

Quality Filters and Pumps provides free water quality assessment for new well completions and designs treatment systems matched to your specific well chemistry. Contact us to schedule your assessment.