Washoe County, Nevada, Central Part
The most common soil here is Typic Udorthents, on about 9% of the land. Wylo and Devada come next.
About 76% of the land drains well, and 14% stays wet for long stretches; groundwater comes within two feet of the surface under 15% of it.
USDA rates 83% of the land very limited for a standard septic drain field, and 81% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 13% of the land floods occasionally or more, and bedrock lies within 40 inches under 55% of it.
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 Washoe County, Nevada, Central Part, 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 Well drained and the dominant hydrologic group is D (very slow infiltration, high runoff). The most common soil order is Mollisols — grassland soils with a thick, dark, fertile topsoil rich in organic matter. 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 Washoe County, Nevada, Central Part. 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 |
|---|---|---|---|---|---|
| Typic Udorthents, 0 to 1 percent slopes | 130K | Somewhat poorly drained | D | Very limited | Very limited |
| Water | 76K | D | Not rated | Not rated | |
| Wylo-Pickup-Bucklake association | 49K | Well drained | D | Very limited | Very limited |
| Sodic Endoaquents, 0 to 1 percent slopes | 42K | Very poorly drained | D | Very limited | Very limited |
| Jaybee-Oppio-Old Camp association | 41K | Well drained | D | Very limited | Very limited |
| Terca-Reywat-Wylo association | 41K | Well drained | D | Very limited | Very limited |
| Devada-Dosie-Softscrabble association | 38K | Well drained | D | Very limited | Very limited |
| Bucklake-Pickup-Wylo association | 25K | Well drained | D | Very limited | Very limited |
| Pickup-Wylo association | 25K | Well drained | D | Very limited | Very limited |
| Devada-Tunnison association | 19K | Well drained | D | Very limited | Very limited |
| Ragtown association | 19K | Moderately well drained | C | Very limited | Very limited |
| Ceejay-Pickup association | 17K | Well drained | D | Very limited | Very limited |
| Foxcan-Sojur-Rock outcrop association | 17K | Well drained | D | Very limited | Very limited |
| Wylo-Bucklake-Rock outcrop association | 16K | Well drained | D | Very limited | Very limited |
| Veta-Mazuma association | 15K | Well drained | A | Very limited | Somewhat limited |
| Devada-Hart Camp-Tunnison association | 15K | Well drained | D | Very limited | Very limited |
| Typic Torriorthents-Aquic Torriorthentscomplex, 0 to 4 percent slopes | 15K | Well drained | C | Somewhat limited | Very limited |
| Trocken, stony-Mazuma association | 15K | Well drained | B | Very limited | Somewhat limited |
| Skedaddle-Jaybee-Rock outcrop association | 14K | Well drained | D | Very limited | Very limited |
| Veta-Langston association | 13K | Well drained | A | Very limited | Somewhat 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 81% 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 83% of soils are rated "very limited" for septic absorption fields. Despite good drainage overall, limitations may stem from shallow bedrock, steep slopes, or seasonal conditions. Engineered or alternative systems are frequently required. Always get a professional perc test before purchasing land that needs septic.
Gardening & Agriculture
Well-drained soils on sloped terrain — good for most plants but watch for erosion. Terracing, contour planting, and mulching help retain moisture and topsoil. Drip irrigation is more effective than sprinklers on slopes.