Buchanan County, Iowa · Independence
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With 36% of homes built before 1960 and about 69 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
June brings the most downpours to Buchanan County, part of 7.2 heavy-rain days a year. Check the sump first.
Backups often follow heavy rain, which Buchanan County gets about 7.2 days a year, when storm water overloads sewer mains and pushes up through the lowest drain in the house.
In Buchanan County, 3.32 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
23% of occupied homes in Buchanan County heat mainly with wood or propane, close to the Iowa county median of 22.1%.
Muggy summer nights, lows of 65°F or more, come about 21 times a year in Buchanan County. Mold after a leak spreads fastest from June through August.
Local risk profile
About 20,694 people live in Buchanan County, 571 square miles in northeast Iowa, in roughly 8,945 homes. Besides Independence, the county seat, the biggest communities are Jesup, Fairbank and Winthrop. Half the homes here were built before 1973, half after.
42/100 Water Damage Risk Index: Moderate Buchanan County ranks 72 of 99 Iowa counties. See the statewide ranking and method.The three factors where Buchanan County ranks highest compared with other Iowa counties.
Buchanan County gets more hard-freeze nights than most of Iowa. It averaged 152 freezing nights a year over 2015–2024, 69 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 26th.
The longest cold spell was straight 24 days without the temperature rising above freezing, ending in February 2019. The coldest night reached about -33°F on January 31, 2019. Burst pipes usually show up when a spell like that breaks and the ice thaws.
Expect the hardest freezes in January, inside a season that runs November to April. 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 13 and end around May 3.
Rainfall is about average for Iowa. Of roughly 37.2 inches of yearly precipitation, the damage comes from the 7.2 days a year with an inch or more, ranked 42nd of 99. June, September and October see the most. The single wettest day in the record: 3.32 inches, June 10, 2020. The worst three-day stretch dropped 3.9 inches, ending June 11, 2020, the kind of soaking that overwhelms sump pumps and storm sewers.
About 98 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
61% of homes in Buchanan County predate 1980, below the Iowa county median of 72.8%, which ranks 88th of Iowa's 99 counties.
The mix runs from 36% built before 1960 to 16% built since 2000, so older neighborhoods bring aging pipe while newer subdivisions bring failed appliance lines and water heaters.
23% date from 1980 to 1999, the window when polybutylene, a gray flexible plastic supply pipe, was used in some homes. It's prone to leaks at the fittings, so it's worth checking for in a house from those years.
Beyond water
About 21 nights a year in Buchanan County stay at 65°F or warmer, a sign of muggy summer air (79th of 99 counties). June is the wettest month. 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 expectHeating fuel matters for fire risk. In Buchanan County it's 52% utility gas, 23% electric, 21% propane and 3% wood. Wood heat is 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 Buchanan County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Fayette gets more pipe-freeze nights than Buchanan. Fayette County has the oldest housing nearby, with 75% of homes built before 1980.
By the numbers
| Factor | Buchanan | Iowa median | Rank |
|---|---|---|---|
| Homes built before 1960 | 36% | 48% | 87 of 99 |
| Homes built before 1980 | 61% | 73% | 88 of 99 |
| Homes built 2000 or later | 16% | 13% | 35 of 99 |
| Manufactured or mobile homes | 4% | 3.2% | 34 of 99 |
| Vacant homes | 7.7% | 9.5% | 77 of 99 |
| Wood or propane heat | 23% | 22% | 49 of 99 |
| Nights at 20°F or colder | 69/yr | 62/yr | 26 of 99 |
| Days with 1 inch+ of rain | 7.2/yr | 7.1/yr | 42 of 99 |
| Freeze-thaw days | 98/yr | 94/yr | 3 of 99 |
| Muggy nights (65°F+) | 21/yr | 29/yr | 79 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 Buchanan County: freezing from November to April, heavy rain in June, September and October.
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