Yakima Nation Irrigated Area, Washington, Part of Yakima County
The most common soil here is Warden, on about 16% of the land: a very fine sandy loam, gritty and crumbly. Ashue and Toppenish come next.
About 67% of the land drains well, and 31% stays wet for long stretches; groundwater comes within two feet of the surface under 25% of it.
USDA rates 48% of the land very limited for a standard septic drain field, and 45% very limited for homes with basements. That means extra cost or special design, not that it can't be done.
Worth knowing: 29% of the land floods occasionally or more, and bedrock lies within 40 inches under 1% 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 Yakima Nation Irrigated Area, Washington, Part of Yakima County, 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 B (moderate infiltration). 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 Yakima Nation Irrigated Area, Washington, Part of Yakima County. 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 |
|---|---|---|---|---|---|
| Naches loam, 0 to 2 percent slopes | 19K | Well drained | B | Not limited | Somewhat limited |
| Ashue loam, 0 to 2 percent slopes | 19K | Well drained | C | Not limited | Not limited |
| Umapine silt loam | 13K | Somewhat poorly drained | C | Very limited | Very limited |
| Toppenish silt loam, 0 to 2 percent slopes | 12K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Warden silt loam, 0 to 2 percent slopes | 12K | Well drained | B | Not limited | Somewhat limited |
| Esquatzel silt loam, 0 to 2 percent slopes | 11K | Well drained | B | Not limited | Somewhat limited |
| Warden silt loam, 2 to 5 percent slopes | 10K | Well drained | B | Not limited | Somewhat limited |
| Kittitas silt loam | 8K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Warden silt loam, 5 to 8 percent slopes | 7K | Well drained | B | Not limited | Somewhat limited |
| Toppenish silty clay loam | 7K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Shano silt loam, 5 to 8 percent slopes | 6K | Well drained | B | Not limited | Somewhat limited |
| Onyx silt loam, 0 to 2 percent slopes | 5K | Well drained | B | Very limited | Very limited |
| Track loam | 5K | Somewhat poorly drained | C/D | Very limited | Very limited |
| Ahtanum silt loam, 0 to 2 percent slopes | 5K | Somewhat poorly drained | D | Very limited | Very limited |
| Shano silt loam, 2 to 5 percent slopes | 4K | Well drained | B | Not limited | Somewhat limited |
| White Swan silt loam, 2 to 5 percent slopes | 4K | Well drained | C | Not limited | Somewhat limited |
| Weirman fine sandy loam, 0 to 2 percent slopes | 4K | Somewhat excessively drained | A | Very limited | Very limited |
| Weirman sandy loam | 3K | Somewhat excessively drained | A | Very limited | Very limited |
| Logy cobbly silt loam | 3K | Well drained | B | Very limited | Very limited |
| Warden silt loam, 8 to 15 percent slopes | 3K | Well drained | B | Somewhat 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 45% of soils have significant building limitations, while the rest are generally suitable. Check specific sites carefully — conditions vary across the area.
Septic Systems
About 48% of soils have significant septic limitations, while others are more suitable. A perc test is essential — conditions vary across the area.
Gardening & Agriculture
Drainage is generally favorable for gardening. Adding compost and mulch will improve fertility and water retention. Test your soil's pH before planting — most vegetables prefer 6.0-7.0.