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Moody County, South Dakota

A shallow water table limits basements on 36% of Moody County's mapped land, a higher share than 54% of US counties. Shrink-swell clay limits houses without basements on 10%.

100% of the county is in drought on the October 13, 2026 Drought Monitor map. FEMA's flood data list 13 flood losses here since 2016. 60% of homes were built before 1980, against 50% nationally; the median home dates from 1972.

Data as of October 13, 2026 · sources

10%

expansive clay: shrink-swell limits slab homes

36%

high water table: limits basements

100%

in drought, October 13, 2026

60%

of homes built before 1980

Soil under Moody County

Expansive clay (limits slab homes)10.1%
High water table (limits basements)35.7%
Septic fields very limited89.8%
Clay swell (LEP, by area)4.6%
High-swell land (LEP 6%+)9.8%
Mapped soil333,107 acres
Soil seriesShare hereSeries nationally: high water table
Moody14%0%
Egan9%n/a
Houdek7%n/a
Wentworth6%n/a
Trent6%n/a
Lamo5%n/a
Pipestone County: 75%Lake County: 27%Minnehaha County: 32%Brookings County: 67%Rock County: 54%Lincoln County: 83%McCook County: 33%Murray County: 85%Moody County PipestoneLakeMinnehahaBrookingsRockLincolnMcCookMurrayMoody
Moody County (heavy outline) and nearby counties, shaded by high water table share.under 10%10-25%25-40%40-60%60%+

How we count · survey areas SD101 (2025-09-10)

What the numbers mean here

On 36% of Moody 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: 18.42 in, 9.24 in below the 1991-2020 average year of 27.66 in.

USDA rates 90% 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 52 of the last 52 weeks; the most was 100% of its area, in 34 weeks, most recently on the October 13, 2026 map.

October 21, 2025Share of area in drought, weeklyOctober 13, 2026
Category, October 13, 2026Share of county
D0 abnormally dry or worse100%
D1 moderate drought or worse100%
D2 severe or worse0%
D3 extreme or worse0%
D4 exceptional0%

Flood losses since 2016

13 flood losses since 2016, $384,641 paid. The worst year was 2019, with 13.

YearFlood losses
20160
20170
20180
201913
20200
20210
20220
20230
20240
20250
2026 to date0

Rain

Average year, 1991-202027.66 in
12 months to August 202618.42 in (-9.24)
202524.33 in (-3.33)
Wettest year since 18952019: 41.70 in
Driest year since 18951976: 11.36 in
Days with 1 inch or more, normal at FLANDREAU (5 mi away)6.5

Homes

Housing units2,759
Median year built1972
Built before 198060%
Built 2000 or later22%
Owner-occupied74%
Median value, owner-occupied$226,500
Single-family detached80%

What repairs cost

Published ranges from cost guides, not quotes. More sources, and where they disagree.

WorkRangeSource
Basement waterproofing, US $3,000 to $10,000 Fixr, February 6, 2026
Sump pump installation, US $800 to $2,000 Fixr, January 31, 2025
Crawl space encapsulation, US $2,000 to $8,000 Fixr, August 29, 2025

Nearby counties

PlaceDistanceExpansive clayHigh water table
Pipestone County, MN 21 mi 8% 75%
Lake County, SD 22 mi 30% 27%
Minnehaha County, SD 25 mi 17% 32%
Brookings County, SD 26 mi 10% 67%
Rock County, MN 31 mi 24% 54%
Lincoln County, MN 34 mi 13% 83%
McCook County, SD 41 mi 26% 33%
Murray County, MN 45 mi 10% 85%

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