Grant County, Minnesota
A shallow water table limits basements on 78% of Grant County's mapped land, a higher share than 87% of US counties. Shrink-swell clay limits houses without basements on 3%.
95.3% 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. 66% of homes were built before 1980, against 50% nationally; the median home dates from 1966.
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 Grant County
| Expansive clay (limits slab homes) | 2.8% |
| High water table (limits basements) | 78.2% |
| Septic fields very limited | 88.8% |
| Clay swell (LEP, by area) | 4.2% |
| High-swell land (LEP 6%+) | 4.2% |
| Mapped soil | 368,100 acres |
| Soil series | Share here | Series nationally: high water table |
|---|---|---|
| Aazdahl | 13% | n/a |
| Formdale | 9% | n/a |
| Flom | 8% | n/a |
| Roliss | 5% | n/a |
| Svea | 5% | n/a |
| Balaton | 5% | n/a |
How we count · survey areas MN051 (2025-09-10)
What the numbers mean here
On 78% of Grant 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: 21.14 in, 4.76 in below the 1991-2020 average year of 25.90 in.
USDA rates 89% of the land very limited for septic absorption fields.
Drought
95.3% 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 4 weeks, most recently on the September 22, 2026 map.
| Category, October 13, 2026 | Share of county |
|---|---|
| D0 abnormally dry or worse | 100% |
| D1 moderate drought or worse | 95.3% |
| D2 severe or worse | 0% |
| D3 extreme or worse | 0% |
| D4 exceptional | 0% |
Flood losses since 2016
FEMA's flood data list no flood losses in Grant County since 2016.
Rain
| Average year, 1991-2020 | 25.90 in |
| 12 months to August 2026 | 21.14 in (-4.76) |
| 2025 | 30.08 in (+4.18) |
| Wettest year since 1895 | 1965: 34.92 in |
| Driest year since 1895 | 1976: 10.70 in |
| Days with 1 inch or more, normal at MORRIS W CNTRL RSCH & OUTREACH (24 mi away) | 5.8 |
Homes
| Housing units | 3,137 |
| Median year built | 1966 |
| Built before 1980 | 66% |
| Built 2000 or later | 16% |
| Owner-occupied | 79% |
| Median value, owner-occupied | $191,000 |
| Single-family detached | 86% |
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 |
|---|---|---|---|
| Stevens County, MN | 23 mi | 11% | 75% |
| Traverse County, MN | 25 mi | 21% | 94% |
| Douglas County, MN | 26 mi | 5% | 46% |
| Otter Tail County, MN | 36 mi | 3% | 40% |
| Pope County, MN | 36 mi | 4% | 52% |
| Wilkin County, MN | 37 mi | 17% | 95% |
| Big Stone County, MN | 40 mi | 15% | 73% |
| Swift County, MN | 48 mi | 6% | 78% |
Sources: USDA SSURGO (September 10, 2025) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status