Miami-Dade County Area, Florida
The dominant drainage class is Very poorly drained and the dominant hydrologic group is C/D (varies with drainage). This report summarizes the major soil map units across the survey area to help you understand what to expect when buying, building, or gardening in Miami-Dade County Area, Florida.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Urban land, 0 to 2 percent slopes | 137K | Not rated | Not rated | ||
| Water | 38K | Not rated | Not rated | ||
| Biscayne marly silt loam-Rock outcrop complex, 0 to 1 percent slopes | 38K | Very poorly drained | C/D | Very limited | Very limited |
| Krome very gravelly marly loam, 0 to 2 percent slopes | 37K | Moderately well drained | D | Very limited | Very limited |
| Shark Valley muck, 0 to 1 percent slopes, frequently flooded | 37K | Very poorly drained | A/D | Very limited | Very limited |
| Udorthents, limestone substratum-Urban land complex, 0 to 2 percent slopes | 33K | Somewhat poorly drained | A | Very limited | Very limited |
| Perrine marly silt loam, frequnetly ponded, 0 to 1 percent slopes | 33K | Very poorly drained | C/D | Very limited | Very limited |
| Rock outcrop-Vizcaya-Biscayne complex, frequently ponded, 0 to 1 percent slopes | 30K | Very poorly drained | Very limited | Very limited | |
| Cooper Town muck, 0 to 1 percent slopes, frequently flooded | 28K | Very poorly drained | A/D | Very limited | Very limited |
| Waters of the Atlantic Ocean | 24K | Not rated | Not rated | ||
| Krome very gravelly marly loam-Urban land complex, 0 to 2 percent slopes | 22K | Moderately well drained | D | Very limited | Very limited |
| Udorthents-Water-Urban land complex, 0 to 60 percent slopes | 20K | Well drained | A | Very limited | Very limited |
| Macks Camp muck, 0 to 1 percent slopes, frequently flooded | 19K | Very poorly drained | A/D | Very limited | Very limited |
| Chekika very gravelly marly loam, 0 to 2 percent slopes | 19K | Somewhat poorly drained | D | Very limited | Very limited |
| Biscayne marly silt loam, frequently ponded, 0 to 1 percent slopes | 15K | Poorly drained | C/D | Very limited | Very limited |
| Biscayne marly silt loam, drained, 0 to 1 percent slopes | 13K | Very poorly drained | C/D | Very limited | Very limited |
| Shark Valley muck, ponded-Urban land complex, 0 to 1 percent slopes | 9K | Very poorly drained | A/D | Very limited | Very limited |
| Lignumvitae marly silt loam, tidal, 0 to 1 percent slopes | 9K | Very poorly drained | C/D | Very limited | Very limited |
| Keylargo muck, tidal, 0 to 1 percent slopes | 9K | Very poorly drained | A/D | Very limited | Very limited |
| Perrine marly silt loam, drained, 0 to 1 percent slopes | 8K | Very poorly drained | C/D | Very limited | Very limited |
What This Means
Building & Foundations
About 65% of soils are rated "very limited" for dwellings with basements. Specific challenges include shallow bedrock, steep slopes, poor drainage in some areas, flood-prone areas. A geotechnical assessment is recommended before building.
Septic Systems
About 65% of soils are rated "very limited" for septic absorption fields. Poorly drained soils can't absorb septic effluent effectively. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Many soils hold water for extended periods. Raised beds are highly recommended to improve drainage for vegetables. Well-adapted native plants and water-loving species will do best in natural conditions.