Soil series profile
Myakka soil series
Myakka is a poorly drained soil with a fine sand surface, mapped on 1,405,098 acres in 35 counties in FL. Hydrologic group A/D.
- Drainage class
- Poorly drained 96% of mapped acres
- Hydrologic group
- A/D >99% of mapped acres
- Typical topsoil pH
- 5.1 strongly acidic · range 5.1–5.1
- Mapped area
- 1.4M acres in 35 counties, 1 state
Typical Myakka profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–6 in (A) | Fine sand | 5.1 | 3% | 96% | 1.5% |
| 6–20 in (E) | Fine sand | 5.1 | 2% | 97% | 0.25% |
| 20–36 in (Bh) | Fine sand | 5.1 | 5% | 94% | 4% |
| 36–80 in (C) | Fine sand | 5.1 | 2% | 97% | 0.25% |

What this means
What Myakka soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Myakka soils is strongly acidic: pH 5.1. Most vegetables and lawn grasses do best around 6.0 to 7.0, so lime is often needed; blueberries, azaleas and rhododendrons like it as it is.
Sandy topsoil covers >99% of mapped Myakka acres. It drains fast and warms early in spring, but dries out and loses nutrients quickly: mulch, compost and steady watering help. The most common surface texture is fine sand (86% of mapped Myakka acres).
100% of mapped Myakka acres is somewhat poorly to very poorly drained, so soil stays soggy for long spells after rain and in wet seasons. Raised beds, plants that tolerate wet feet, and not working the soil while wet all help.
For lawns and yards
On 100% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.
A seasonal high water table comes within 18 inches of the surface on 100% of mapped acres, often in spring. Basements, sump pumps and lawns in low spots feel it first.
For a septic system
For conventional septic absorption fields, NRCS rates 100% of the acres in mapped Myakka soils very limited, 0% somewhat limited and 0% not limited.
Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Myakka soil is found
Mapped acres
Myakka is mapped in Florida.
| County | Acres | Share of county land |
|---|---|---|
| Hillsborough County, FL | 155,876 | 23.2% |
| Okeechobee County, FL | 138,460 | 28.1% |
| Osceola County, FL | 117,889 | 13.6% |
| Manatee County, FL | 87,160 | 17.4% |
| Highlands County, FL | 80,956 | 12.3% |
| Polk County, FL | 75,686 | 6.5% |
| Lake County, FL | 67,743 | 11.2% |
| Brevard County, FL | 67,606 | 8.4% |
| Volusia County, FL | 64,488 | 9.1% |
| Sarasota County, FL | 59,430 | 13.4% |
| Putnam County, FL | 51,009 | 11.0% |
| Palm Beach County, FL | 49,051 | 3.9% |
| Hardee County, FL | 43,525 | 10.7% |
| DeSoto County, FL | 42,556 | 10.5% |
| St. Johns County, FL | 40,531 | 10.3% |
| Glades County, FL | 27,368 | 5.5% |
| Pinellas County, FL | 25,970 | 12.1% |
| Hendry County, FL | 24,913 | 3.3% |
| Indian River County, FL | 23,842 | 7.1% |
| Levy County, FL | 20,196 | 2.7% |
| Pasco County, FL | 19,734 | 4.1% |
| Charlotte County, FL | 19,553 | 4.4% |
| Flagler County, FL | 18,991 | 6.1% |
| Seminole County, FL | 18,419 | 9.3% |
| Lee County, FL | 13,134 | 2.6% |
| St. Lucie County, FL | 9,639 | 2.5% |
| Sumter County, FL | 7,535 | 2.1% |
| Hernando County, FL | 6,685 | 2.1% |
| Citrus County, FL | 5,964 | 1.4% |
| Martin County, FL | 5,405 | 1.6% |
| Collier County, FL | 4,944 | 0.7% |
| Marion County, FL | 4,692 | 0.4% |
| Alachua County, FL | 3,878 | 0.7% |
| Orange County, FL | 1,732 | 0.3% |
| Broward County, FL | 534 | 0.1% |
Septic absorption fields
NRCS rating, share of Myakka acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 100.0% |
Drainage, water table and flooding
Share of Myakka acres
- Depth to seasonal high water table
- About 1.0 feet (12 in) (median where reported); within 18 inches on 100% of acres.
- Flooding
- Mapped as flooding on <1% of acres (<1% occasional, <1% frequent).
- Slope
- Typically 1–1% (median 1%).
- Topsoil organic matter
- Median 1.5%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 0.0% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 96.1% |
| Very poorly drained | 3.9% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 0.0% |
| B: moderate infiltration | 0.0% |
| C: slow infiltration | 0.0% |
| D: very slow infiltration (clayey, shallow or wet) | 0.0% |
| A/D: D as is, A if drained | 99.1% |
| B/D: D as is, B if drained | 0.9% |
| C/D: D as is, C if drained | 0.0% |
Sources & data dates
- Source
- USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
- Data date
- SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
- Scope
- All map unit components named Myakka (component kind "Series") in SSURGO: 1,405,098 acres.
- Method
- Shares are by mapped acres of Myakka components. The profile comes from the single largest Myakka component. Full methodology.