Soil series profile
Regent soil series
Regent is a well drained soil with a silty clay loam surface, mapped on 724,086 acres in 43 counties across 3 states. Hydrologic group C.
- Drainage class
- Well drained 100% of mapped acres
- Hydrologic group
- C 59% of mapped acres
- Typical topsoil pH
- 6.7 neutral · range 6.2–7.1
- Mapped area
- 724k acres in 43 counties, 3 states
Typical Regent profile
Texture and pH by depth
Show as a table
| Depth | Texture | pH | Clay | Sand | Organic matter |
|---|---|---|---|---|---|
| 0–6 in (Ap) | Silty clay loam | 6.2 | 34% | 17% | 3% |
| 6–13 in (Bt1) | Silty clay | 7.1 | 45% | 10% | 2% |
| 13–19 in (Bt2) | Silty clay | 7.5 | 41% | 15% | 1.3% |
| 19–28 in (Bk) | Silty clay | 8.0 | 42% | 4% | 0.75% |
| 28–79 in (Cr) | Bedrock | Not reported | Not reported | Not reported | Not reported |
What this means
What Regent soil means for gardens, lawns and septic systems
For gardens
Typical topsoil in Regent soils is neutral: pH 6.7 (most land between 6.2 and 7.1), the range most vegetables, flowers and lawn grasses prefer.
Loamy topsoil (loam, silt loam and similar) covers >99% of mapped Regent acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silty clay loam (87% of mapped Regent acres).
100% of mapped Regent acres is moderately well to excessively drained, which suits most garden plants.
For lawns and yards
On 100% 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 100% of the acres in mapped Regent soils very limited, 0% somewhat limited and 0% not limited.
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 Regent soil is found
Mapped acres
Regent is mapped in North Dakota, South Dakota and Montana.
| County | Acres | Share of county land |
|---|---|---|
| Ziebach County, SD | 93,430 | 7.4% |
| Perkins County, SD | 69,808 | 3.8% |
| Lewis and Clark County, MT | 66,226 | 3.2% |
| Grant County, ND | 54,355 | 5.1% |
| Corson County, SD | 51,643 | 3.3% |
| Hettinger County, ND | 48,263 | 6.7% |
| Morton County, ND | 41,458 | 3.4% |
| Stark County, ND | 37,296 | 4.4% |
| Sioux County, ND | 35,899 | 5.1% |
| Big Horn County, MT | 31,782 | 0.7% |
| Dunn County, ND | 31,573 | 2.5% |
| Dewey County, SD | 31,489 | 2.1% |
| Wibaux County, MT | 24,367 | 4.3% |
| Adams County, ND | 18,128 | 2.9% |
| Bowman County, ND | 15,785 | 2.1% |
| Slope County, ND | 15,114 | 1.9% |
| Oliver County, ND | 8,748 | 1.9% |
| Fergus County, MT | 8,519 | 0.3% |
| Emmons County, ND | 7,582 | 0.8% |
| Mercer County, ND | 6,947 | 1.0% |
| McKenzie County, ND | 6,598 | 0.4% |
| Billings County, ND | 3,350 | 0.5% |
| Burleigh County, ND | 2,732 | 0.3% |
| McIntosh County, ND | 2,708 | 0.4% |
| Fallon County, MT | 2,677 | 0.3% |
| Logan County, ND | 2,310 | 0.4% |
| Golden Valley County, ND | 1,368 | 0.2% |
| McLean County, ND | 1,302 | 0.1% |
| Richland County, MT | 851 | 0.1% |
| Harding County, SD | 604 | 0.0% |
| Mountrail County, ND | 374 | 0.0% |
| Dawson County, MT | 182 | 0.0% |
| Williams County, ND | 170 | 0.0% |
| Campbell County, SD | 152 | 0.0% |
| Meade County, SD | 109 | 0.0% |
| McPherson County, SD | 51 | 0.0% |
| Prairie County, MT | 50 | 0.0% |
| Musselshell County, MT | 45 | 0.0% |
| Glacier County, MT | 34 | 0.0% |
| Golden Valley County, MT | 8 | 0.0% |
| Rosebud County, MT | 1 | 0.0% |
| Kidder County, ND | 1 | 0.0% |
| McCone County, MT | 0 | 0.0% |
Septic absorption fields
NRCS rating, share of Regent acres
Show as a table
| Category | Share of acres |
|---|---|
| Not limited | 0.0% |
| Somewhat limited | 0.0% |
| Very limited | 100.0% |
Drainage, water table and flooding
Share of Regent acres
- Depth to seasonal high water table
- About 4.3 feet (51 in) (median where reported).
- Flooding
- Not mapped as flooding on most acres.
- Slope
- Typically 4–12% (median 5%).
- Topsoil organic matter
- Median 3%.
Drainage class
Show as a table
| Category | Share of acres |
|---|---|
| Excessively drained | 0.0% |
| Somewhat excessively drained | 0.0% |
| Well drained | 100.0% |
| Moderately well drained | 0.0% |
| Somewhat poorly drained | 0.0% |
| Poorly drained | 0.0% |
| Very poorly drained | 0.0% |
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 | 59.0% |
| D: very slow infiltration (clayey, shallow or wet) | 41.0% |
| 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% |
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 Regent (component kind "Series") in SSURGO: 724,086 acres.
- Method
- Shares are by mapped acres of Regent components. The profile comes from the single largest Regent component. Full methodology.