Nantucket County, Massachusetts
The most common soil here is Evesboro, on about 35% of the land: a sand, loose sand that holds almost no water. Plymouth and Riverhead come next.
About 65% of the land drains well, and 11% stays wet for long stretches; groundwater comes within two feet of the surface under 15% of it.
USDA rates 82% of the land very limited for a standard septic drain field, and 24% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 6% of the land floods occasionally or more.
Soils change over short distances, so look up an address below for the soil at that exact spot and the reasons behind each rating.
The soils you're most likely standing on
The biggest named soils in Nantucket County, Massachusetts, each drawn five feet deep from its official USDA description, in its recorded colors.
Dots mark gravel; white flecks mark lime. Shares are by acres across the survey area, and each mapped patch usually mixes several of these soils.
The biggest mapped areas
The dominant drainage class is Excessively drained and the dominant hydrologic group is A (high infiltration, low runoff). The most common soil order is Inceptisols — young soils with minimal horizon development but more than Entisols. 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 Nantucket County, Massachusetts. Search your address to find the exact soil composition, drainage, and series details at your specific location.
| Soil Map Unit | Acres | Drainage | Hydro Group | Dwellings | Septic |
|---|---|---|---|---|---|
| Evesboro sand, 0 to 3 percent slopes | 7K | Excessively drained | A | Not limited | Very limited |
| Water, ocean | 5K | Not rated | Not rated | ||
| Evesboro sand, 3 to 8 percent slopes | 5K | Excessively drained | A | Not limited | Very limited |
| Plymouth-Evesboro complex, 3 to 8 percent slopes | 2K | Excessively drained | A | Not limited | Very limited |
| Plymouth-Evesboro complex, 8 to 15 percent slopes | 2K | Excessively drained | A | Somewhat limited | Very limited |
| Water, saline | 2K | Not rated | Not rated | ||
| Hooksan sand, 3 to 15 percent slopes | 2K | Excessively drained | A | Very limited | Very limited |
| Riverhead sandy loam, 0 to 3 percent slopes | 1K | Well drained | A | Not limited | Very limited |
| Riverhead-Nantucket complex, 3 to 8 percent slopes | 1K | Well drained | A | Not limited | Very limited |
| Beaches, sand | 1K | Very limited | Very limited | ||
| Freetown and Swansea mucks, coastal lowland, 0 to 1 percent slopes | 1K | Very poorly drained | B/D | Very limited | Very limited |
| Evesboro sand, 8 to 15 percent slopes | 1K | Excessively drained | A | Somewhat limited | Very limited |
| Plymouth-Evesboro complex, 15 to 25 percent slopes | 1K | Excessively drained | A | Very limited | Very limited |
| Berryland Variant loamy sand, 0 to 3 percent slopes | 886 | Very poorly drained | B/D | Very limited | Very limited |
| Pawcatuck mucky peat, 0 to 2 percent slopes, very frequently flooded | 707 | Very poorly drained | A/D | Very limited | Very limited |
| Klej and Pompton soils, 0 to 3 percent slopes | 651 | Poorly drained | A/D | Very limited | Very limited |
| Katama sandy loam, 0 to 3 percent slopes | 463 | Well drained | A | Not limited | Very limited |
| Riverhead sandy loam, 3 to 8 percent slopes | 386 | Well drained | A | Not limited | Very limited |
| Freetown and Swansea coarse sands, 0 to 3 percent slopes, sanded surface and inactive | 309 | Very poorly drained | B/D | Very limited | Very limited |
| Evesboro sand, 3 to 8 percent slopes, overblown | 302 | Excessively drained | A | Not limited | Very limited |
Soil Orders in This Area
The USDA classifies every soil into one of 12 soil orders. Here are the dominant orders found in this survey area.
What This Means
Building & Foundations
About 24% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 82% of soils are rated "very limited" for septic absorption fields. The well-drained soils may actually drain too fast for standard leach fields, allowing effluent to reach groundwater. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Soils tend to drain very quickly, meaning nutrients and water don't stick around long. Raised beds with amended soil, drip irrigation, and heavy mulching will give the best results. Compost is your best friend here — it improves water retention dramatically.