Soil series profile
Vona soil series
Vona is a well drained soil with a loamy sand surface, mapped on 891,319 acres in 40 counties across 7 states. Hydrologic group A.
- Drainage class
- Well drained 63% of mapped acres
- Hydrologic group
- A 99% of mapped acres
- Typical topsoil pH
- 7.2 neutral · range 7.0–7.3
- Mapped area
- 891k acres in 40 counties, 7 states
Typical Vona profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–6 in (H1) | Loamy sand | 7.2 | 6% | 85% | 0.75% |
| 6–28 in (H2) | Fine sandy loam | 7.5 | 13% | 67% | 0.75% |
| 28–60 in (H3) | Sandy loam | 8.5 | 9% | 67% | 0.25% |
What this means
What Vona soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Vona soils is neutral: pH 7.2 (most land between 7.0 and 7.3), the range most vegetables, flowers and lawn grasses prefer.
Sandy topsoil covers 65% of mapped Vona acres. It drains fast and warms early in spring, but dries out and loses nutrients quickly: mulch, compost and steady watering help. The most common surface texture is loamy sand (46% of mapped Vona acres).
37% of mapped Vona acres is excessively or somewhat excessively drained: water moves through fast, so gardens need more frequent watering in dry spells.
For lawns and yards
99% of mapped acres is in hydrologic group A, where water soaks in fast. Lawns there dry out quickly; deeper, less frequent watering and organic matter help.
For a septic system
For conventional septic absorption fields, NRCS rates 8% of the acres in mapped Vona soils very limited, 9% somewhat limited and 82% not limited.
Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.
Where Vona soil is found
Mapped acres
Vona is mapped in Colorado, Kansas, Oklahoma, Montana, Nebraska, Wyoming and Texas.
| County | Acres | Share of county land |
|---|---|---|
| Weld County, CO | 171,595 | 6.7% |
| Baca County, CO | 129,162 | 7.9% |
| Morgan County, CO | 92,615 | 11.5% |
| Lincoln County, CO | 62,417 | 3.8% |
| Texas County, OK | 50,974 | 3.9% |
| Adams County, CO | 49,415 | 6.5% |
| Cheyenne County, CO | 42,190 | 3.7% |
| Finney County, KS | 40,769 | 4.9% |
| Prowers County, CO | 27,942 | 2.7% |
| Yuma County, CO | 27,709 | 1.9% |
| Kearny County, KS | 26,955 | 4.9% |
| Washington County, CO | 25,885 | 1.6% |
| El Paso County, CO | 20,462 | 1.4% |
| Las Animas County, CO | 16,954 | 0.6% |
| Powder River County, MT | 16,130 | 0.8% |
| Hamilton County, KS | 13,565 | 2.1% |
| Grant County, KS | 8,738 | 2.4% |
| Carbon County, MT | 7,842 | 0.6% |
| Kit Carson County, CO | 7,693 | 0.6% |
| Dundy County, NE | 7,533 | 1.3% |
| Logan County, CO | 6,957 | 0.6% |
| Haskell County, KS | 6,597 | 1.8% |
| Crook County, WY | 5,141 | 0.3% |
| Kiowa County, CO | 4,269 | 0.4% |
| Huerfano County, CO | 2,939 | 0.3% |
| Denver County, CO | 2,747 | 2.7% |
| Stanton County, KS | 2,457 | 0.6% |
| Ochiltree County, TX | 2,054 | 0.3% |
| Gray County, KS | 1,993 | 0.4% |
| Elbert County, CO | 1,912 | 0.2% |
| Phillips County, CO | 1,488 | 0.4% |
| Arapahoe County, CO | 1,257 | 0.2% |
| Larimer County, CO | 1,028 | 0.1% |
| Boulder County, CO | 1,008 | 0.2% |
| Cimarron County, OK | 775 | 0.1% |
| Crowley County, CO | 715 | 0.1% |
| Sedgwick County, CO | 678 | 0.2% |
| Park County, WY | 435 | 0.0% |
| Chase County, NE | 126 | 0.0% |
| Lane County, KS | 121 | 0.0% |
Septic absorption fields
NRCS rating, share of Vona acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 82.0% |
| Somewhat limited | 9.2% |
| Very limited | 8.4% |
| Not rated | 0.4% |
Drainage, water table and flooding
Share of Vona acres
- Depth to seasonal high water table
- About 3.4 feet (41 in) (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 1–7% (median 4%).
- Topsoil organic matter
- Median 1%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 36.9% |
| Well drained | 62.8% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
| Not rated | 0.4% |
Hydrologic soil group
Show as a table
| Category | Share of acres |
|---|---|
| A: fast infiltration (mostly sandy or gravelly) | 98.6% |
| B: moderate infiltration | 1.1% |
| C: slow infiltration | 0.0% |
| D: very slow infiltration (clayey, shallow or wet) | 0.0% |
| 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 | 0.4% |
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 Vona (component kind "Series") in SSURGO: 891,319 acres.
- Method
- Shares are by mapped acres of Vona components. The profile comes from the single largest Vona component. Full methodology.