Waseca County, Minnesota · Waseca
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With 40% of homes built before 1960 and about 81 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
Basements flood here mostly in July. Waseca County averages 7.1 days a year with an inch of rain or more.
40% 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.
Waseca County's wettest day in the 2015–2024 record brought 5.29 inches, and about 89 freeze-thaw days a year mean ice dams in some winters.
27% of occupied homes in Waseca County heat mainly with wood or propane, below the Minnesota county median of 30%.
About 19 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
About 18,885 people live in Waseca County, 423 square miles in southern Minnesota, in roughly 7,922 homes. The county seat is Waseca, and Janesville, New Richland and Waldorf round out the largest towns. Half the homes here were built before 1970, half after.
60/100 Water Damage Risk Index: Elevated Waseca County ranks 21 of 87 Minnesota counties. See the statewide ranking and method.The three factors where Waseca County ranks highest compared with other Minnesota counties.
Winters here are on the gentler end for Minnesota, and pipes still freeze. In the 2015–2024 record the county logged about 81 nights a year at or below 20°F (61st of 87) and 156 below freezing. Twenty degrees is roughly where uninsulated pipes start to freeze.
On January 31, 2019 the low fell to about -29°F, and in the stretch ending January 2018 the county went 19 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 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 2.
Heavy rain is a bigger factor here than in most of Minnesota. About 7.1 days a year bring an inch or more (14th of 87), most often in July, out of 36.6 inches of total precipitation. On September 22, 2016, 5.29 inches fell in a single day. The worst three-day stretch dropped 5.57 inches, ending September 23, 2016, the kind of soaking that overwhelms sump pumps and storm sewers.
The temperature crosses 32°F in both directions on roughly 89 days a year. Each cycle melts and refreezes water at roof edges and in foundation cracks, which is how ice dams and basement seepage get started.
Housing
70% of homes in Waseca County predate 1980, above the Minnesota county median of 58.4%, which ranks 22nd of Minnesota's 87 counties.
40% were built before 1960. Homes from that era often still have galvanized steel supply pipe, which rusts from the inside until it pinholes, and cast iron drains that crack with age. Slow leaks behind walls are a common start to water damage in these houses.
Beyond water
Waseca County averages 19 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in May. Keep indoor humidity under 60%, as the EPA advises, and dry any leak within 24 to 48 hours; in a humid month a wet basement left alone won't dry by itself.
Mold remediation: what to expectBy main heating fuel, Waseca County homes break down as 58% utility gas, 12% electric, 25% propane and 2% wood. Fires here are likelier to start in the kitchen or the wiring than in the furnace. After any fire, keep the HVAC off until ducts are checked, or soot will travel through the house.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Waseca County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Waseca gets more pipe-freeze nights than any of its neighbors. Faribault County has the oldest housing nearby, with 86% of homes built before 1980.
By the numbers
| Factor | Waseca | Minnesota median | Rank |
|---|---|---|---|
| Homes built before 1960 | 40% | 34% | 33 of 87 |
| Homes built before 1980 | 70% | 58% | 22 of 87 |
| Homes built 2000 or later | 14% | 21% | 62 of 87 |
| Manufactured or mobile homes | 2.5% | 3.8% | 60 of 87 |
| Vacant homes | 5.6% | 11% | 71 of 87 |
| Wood or propane heat | 27% | 30% | 51 of 87 |
| Nights at 20°F or colder | 81/yr | 89/yr | 61 of 87 |
| Days with 1 inch+ of rain | 7.1/yr | 5.3/yr | 14 of 87 |
| Freeze-thaw days | 89/yr | 86/yr | 23 of 87 |
| Muggy nights (65°F+) | 19/yr | 13/yr | 19 of 87 |
Rank 1 is the highest value. Bars run from the lowest to the highest Minnesota county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Waseca County: freezing from November to April, heavy rain in July, August 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