Iron County, Utah
USDA's soil survey flags shrink-swell clay on 6% of Iron County's mapped land and a shallow water table under basements on 1%, both below the national shares of 15% and 29%. The soil survey maps 87% of the county's land area; these shares describe the mapped part.
100% of the county is in drought on the October 13, 2026 Drought Monitor map. FEMA's flood data list 9 flood losses here since 2016. 23% of homes were built before 1980, against 50% nationally; the median home dates from 1997.
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 Iron County
| Expansive clay (limits slab homes) | 5.7% |
| High water table (limits basements) | 0.8% |
| Septic fields very limited | 62.3% |
| Clay swell (LEP, by area) | 4.1% |
| High-swell land (LEP 6%+) | 5.9% |
| Mapped soil | 1,837,103 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Checkett | 6% | n/a |
| Taylorsflat | 5% | n/a |
| Sevy | 4% | n/a |
| Wales | 3% | n/a |
| Antelope Springs | 3% | n/a |
| Bullion | 3% | n/a |
How we count · survey areas UT634 (2025-08-27)
What the numbers mean here
Rain over the 12 months to August 2026: 13.53 in, 0.93 in below the 1991-2020 average year of 14.46 in.
USDA rates 62% of the land very limited for septic absorption fields.
With shrink-swell clay on 6% and a shallow water table on 1% of the land, the soil survey points to neither problem across most of Iron County; conditions still vary lot by lot.
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 52 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 | 49.8% |
| D3 extreme or worse | 0% |
| D4 exceptional | 0% |
Flood losses since 2016
9 flood losses since 2016, $134,014 paid. The worst year was 2023, with 2.
| Year | Flood losses |
|---|---|
| 2016 | 2 |
| 2017 | 0 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 0 |
| 2021 | 2 |
| 2022 | 0 |
| 2023 | 2 |
| 2024 | 0 |
| 2025 | 0 |
| 2026 to date | 0 |
Rain
| Average year, 1991-2020 | 14.46 in |
| 12 months to August 2026 | 13.53 in (-0.93) |
| 2025 | 12.59 in (-1.87) |
| Wettest year since 1895 | 1941: 23.92 in |
| Driest year since 1895 | 2002: 7.05 in |
| Days with 1 inch or more, normal at CEDAR CITY MUNI AP (18 mi away) | 0.4 |
Homes
| Housing units | 23,550 |
| Median year built | 1997 |
| Built before 1980 | 23% |
| Built 2000 or later | 43% |
| Owner-occupied | 68% |
| Median value, owner-occupied | $379,000 |
| Single-family detached | 63% |
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 |
|---|---|---|---|
| Beaver County, UT | 31 mi | 5% | 1% |
| Washington County, UT | 46 mi | 4% | 1% |
| Piute County, UT | 70 mi | n/a | n/a |
| Millard County, UT | 71 mi | 13% | 11% |
| Lincoln County, NV | 87 mi | 6% | 1% |
| Kane County, UT | 93 mi | 4% | under 1% |
| Sevier County, UT | 100 mi | 2% | 6% |
| Garfield County, UT | 101 mi | 4% | 1% |
Sources: USDA SSURGO (August 27, 2025) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · NOAA (August 2026) · Census ACS 2020-2024. Methods · Data status