Soil series profile
Reywat soil series
Reywat is a well drained soil with a very cobbly loam surface, mapped on 309,930 acres in 19 counties across 5 states. Hydrologic group D.
- Drainage class
- Well drained 97% of mapped acres
- Hydrologic group
- D 97% of mapped acres
- Typical topsoil pH
- 7.2 neutral · range 7.2–7.2
- Mapped area
- 310k acres in 19 counties, 5 states
Typical Reywat profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–2 in (H1) | Very cobbly loam | 7.2 | 18% | 43% | 3% |
| 2–11 in (H2) | Very cobbly clay loam | 7.5 | 31% | 35% | 0.75% |
| 11–21 in (H3) | Unweathered bedrock | Not reported | Not reported | Not reported | Not reported |
What this means
What Reywat soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Reywat soils is neutral: pH 7.2, the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers 97% of mapped Reywat acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is very stony loam (62% of mapped Reywat acres).
97% of mapped Reywat acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
On 97% 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.
For a septic system
For conventional septic absorption fields, NRCS rates 97% of the acres in mapped Reywat soils very limited, 0% somewhat limited and 0% not limited (3% not rated, such as urban land, pits or water).
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 Reywat soil is found
Mapped acres
Reywat is mapped in Nevada, Idaho, Utah, Oregon and California.
| County | Acres | Share of county land |
|---|---|---|
| Washoe County, NV | 106,090 | 2.6% |
| Washington County, ID | 72,882 | 10.5% |
| Tooele County, UT | 51,554 | 1.2% |
| Juab County, UT | 26,239 | 2.8% |
| Storey County, NV | 15,038 | 9.0% |
| Utah County, UT | 7,929 | 0.8% |
| Cassia County, ID | 6,213 | 0.6% |
| Payette County, ID | 5,021 | 2.2% |
| Wheeler County, OR | 3,333 | 0.3% |
| Adams County, ID | 2,180 | 0.8% |
| Lyon County, NV | 2,014 | 0.2% |
| Malheur County, OR | 1,610 | 0.0% |
| Davis County, UT | 1,136 | 0.8% |
| Modoc County, CA | 908 | 0.1% |
| Carson City, NV | 597 | 0.7% |
| Lassen County, CA | 427 | 0.0% |
| Grant County, OR | 104 | 0.0% |
| Douglas County, NV | 97 | 0.0% |
| Alpine County, CA | 96 | 0.0% |
Septic absorption fields
NRCS rating, share of Reywat acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 97.2% |
| Not rated | 2.8% |
Drainage, water table and flooding
Share of Reywat acres
- Depth to seasonal high water table
- None reported within about 6.5 feet (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 15–45% (median 33%).
- Topsoil organic matter
- Median 2%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 97.2% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
| Not rated | 2.8% |
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) | 97.2% |
| A/D: D as is, A if drained | 0.0% |
| B/D: D as is, B if drained | 0.0% |
| C/D: D as is, C if drained | 0.0% |
| Not rated | 2.8% |
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 Reywat (component kind "Series") in SSURGO: 309,930 acres.
- Method
- Shares are by mapped acres of Reywat components. The profile comes from the single largest Reywat component. Full methodology.