Van Buren County, Iowa · Keosauqua
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With 42% of homes built before 1960 and about 49 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
Basements flood here mostly in September. Van Buren County averages 7.1 days a year with an inch of rain or more.
42% of homes here predate 1960, when clay and cast iron sewer laterals were standard. Roots and cracks in those lines are a common cause of backups.
Van Buren County's wettest day in the 2015–2024 record brought 3.23 inches, and about 89 freeze-thaw days a year mean ice dams in some winters.
64% of occupied homes in Van Buren County heat mainly with wood or propane, above the Iowa county median of 22.1%.
About 42 nights a year here stay at 65°F or warmer, so basements and crawl spaces can grow mold even without a leak.
Local risk profile
Van Buren County covers 485 square miles of southeast Iowa, with about 7,241 residents and 3,490 homes. Keosauqua is the county seat; Farmington, Milton and Birmingham are the next largest communities. Half the homes here were built before 1970, half after.
36/100 Water Damage Risk Index: Moderate Van Buren County ranks 86 of 99 Iowa counties. See the statewide ranking and method.The three factors where Van Buren County ranks highest compared with other Iowa counties.
Winters here are on the gentler end for Iowa, and pipes still freeze. It averaged 127 freezing nights a year over 2015–2024, 49 of them at 20°F or colder, cold enough for pipes in outside walls and crawl spaces to freeze. Among 99 Iowa counties that's 94th.
On January 31, 2019 the low fell to about -22°F, and in the stretch ending January 2018 the county went 17 days in a row below freezing. Leaks from split pipes typically appear the day the thaw arrives.
Expect the hardest freezes in January, inside a season that runs November to March. That's when an outdoor spigot left connected to a hose, or a pipe in a crawl space, is most likely to split.
Freezing nights typically start around Oct 19 and end around Apr 21.
Rainfall is about average for Iowa. About 7.1 days a year bring an inch or more (49th of 99), most often in September, out of 35.1 inches of total precipitation. On May 29, 2019, 3.23 inches fell in a single day. The worst three-day stretch dropped 4.26 inches, ending September 30, 2019, the kind of soaking that overwhelms sump pumps and storm sewers.
About 89 days a year swing from below freezing at night to above freezing by day. Those freeze-thaw cycles feed ice dams on roofs, open cracks in foundations and driveways, and stress pipes that are already marginal.
Housing
Iowa's 99 counties range widely in housing age; Van Buren ranks 67th, with 67% of its homes built before 1980.
Older and newer homes sit side by side here: 42% predate 1960 and 16% are from 2000 or later. Corroded pipe is the typical failure in the first group, burst supply hoses in the second.
Manufactured and mobile homes make up 8% of the housing here. Water lines in the underbelly depend on intact skirting and working heat tape, and they're usually the first to freeze in a cold snap.
With 17% of homes empty at survey time, landlords and seasonal owners should shut off the main or schedule checks in winter. An unheated vacant house is also where many policies limit freeze coverage.
Beyond water
Summer nights that don't drop below 65°F, a good marker of humid air, come about 42 times a year here, above the Iowa county median of 29. Mold grows when indoor humidity stays above about 60%, the EPA's ceiling. A basement dehumidifier set to 50% and drying anything wet within 24 to 48 hours prevents most problems.
Mold remediation: what to expectBy main heating fuel, Van Buren County homes break down as 20% utility gas, 15% electric, 48% propane and 16% wood. Wood and propane heat are above the Iowa norm. Annual chimney and vent inspection, which the NFPA recommends, is one of the most effective fire-prevention habits for these homes.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Van Buren County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Henry and Jefferson get more pipe-freeze nights than Van Buren. Lee County has the oldest housing nearby, with 77% of homes built before 1980.
By the numbers
| Factor | Van Buren | Iowa median | Rank |
|---|---|---|---|
| Homes built before 1960 | 42% | 48% | 73 of 99 |
| Homes built before 1980 | 67% | 73% | 67 of 99 |
| Homes built 2000 or later | 16% | 13% | 36 of 99 |
| Manufactured or mobile homes | 7.9% | 3.2% | 6 of 99 |
| Vacant homes | 17% | 9.5% | 8 of 99 |
| Wood or propane heat | 64% | 22% | 1 of 99 |
| Nights at 20°F or colder | 49/yr | 62/yr | 94 of 99 |
| Days with 1 inch+ of rain | 7.1/yr | 7.1/yr | 49 of 99 |
| Freeze-thaw days | 89/yr | 94/yr | 89 of 99 |
| Muggy nights (65°F+) | 42/yr | 29/yr | 5 of 99 |
Rank 1 is the highest value. Bars run from the lowest to the highest Iowa county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Van Buren County: freezing from November to March, heavy rain in May, July and September.
Sources: U.S. Census Bureau, ACS 2024 5-year estimates (2020-2024); weather from NOAA nClimGrid-Daily county averages (EpiNOAA), 2015–2024, averaged across the county; county boundaries from Census TIGER. Reviewed 2026-10-21. Methodology