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Sargent County, North Dakota
A shallow water table limits basements on 71% of Sargent County's mapped land, a higher share than 82% of US counties. Shrink-swell clay limits houses without basements on 16%.
100% of the county is in drought on the October 13, 2026 Drought Monitor map. FEMA's flood data list no flood losses here since 2016. 59% of homes were built before 1980, against 50% nationally; the median home dates from 1975.
Data as of October 13, 2026 · sources
expansive clay: shrink-swell limits slab homes
high water table: limits basements
in drought, October 13, 2026
of homes built before 1980
Soil under Sargent County
| Expansive clay (limits slab homes) | 16.4% |
| High water table (limits basements) | 70.6% |
| Septic fields very limited | 86.8% |
| Clay swell (LEP, by area) | 4.2% |
| High-swell land (LEP 6%+) | 16.4% |
| Mapped soil | 555,200 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Forman | 18% | n/a |
| Aastad | 16% | n/a |
| Parnell | 6% | n/a |
| Glyndon | 5% | n/a |
| Gardena | 4% | n/a |
| Buse | 4% | n/a |
How we count · survey areas ND081 (2026-05-04)
What the numbers mean here
Clay swell averages a linear extensibility of 4.2% by land area here, and 16% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 16% of the mapped land.
Clay shrinks as it dries: 100% of the county is in drought on the latest map, and 16% of Sargent County's mapped land has shrink-swell clay.
On 71% of Sargent County's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
Rain over the 12 months to August 2026: 17.57 in, 5.94 in below the 1991-2020 average year of 23.51 in.
USDA rates 87% of the land very limited for septic absorption fields.
Drought
100% of the county is in drought (D1 or worse) on the October 13, 2026 map. Part of the county was in drought in 10 of the last 52 weeks; the most was 100% of its area, in 3 weeks, most recently on the October 13, 2026 map.
| Category, October 13, 2026 | Share of county |
|---|---|
| D0 abnormally dry or worse | 100% |
| D1 moderate drought or worse | 100% |
| D2 severe or worse | 92.7% |
| D3 extreme or worse | 27.6% |
| D4 exceptional | 0% |
Flood losses since 2016
FEMA's flood data list no flood losses in Sargent County since 2016.
Rain
| Average year, 1991-2020 | 23.51 in |
| 12 months to August 2026 | 17.57 in (-5.94) |
| 2025 | 26.16 in (+2.65) |
| Wettest year since 1895 | 1916: 32.55 in |
| Driest year since 1895 | 1976: 8.85 in |
| Days with 1 inch or more, normal at FORMAN 5 SSE (5 mi away) | 5.6 |
Homes
| Housing units | 1,996 |
| Median year built | 1975 |
| Built before 1980 | 59% |
| Built 2000 or later | 20% |
| Owner-occupied | 73% |
| Median value, owner-occupied | $163,200 |
| Single-family detached | 73% |
What repairs cost
Published ranges from cost guides, not quotes. More sources, and where they disagree.
Nearby counties
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Ransom County, ND | 24 mi | 12% | 62% |
| Marshall County, SD | 26 mi | 22% | 57% |
| Richland County, ND | 35 mi | 29% | 90% |
| Dickey County, ND | 42 mi | 20% | 60% |
| Roberts County, SD | 47 mi | 26% | 60% |
| LaMoure County, ND | 49 mi | 16% | 53% |
| Brown County, SD | 50 mi | 28% | 56% |
| Day County, SD | 52 mi | 19% | 63% |
Sources: USDA SSURGO (May 4, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status