Livingston County, Illinois · Pontiac
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With 49% of homes built before 1960 and about 42 hard-freeze nights a year, frozen and split pipes are a leading winter risk in the county.
June brings the most downpours to Livingston County, part of 6.9 heavy-rain days a year. Check the sump first.
49% 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.
In Livingston County, 3.61 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
16% of occupied homes in Livingston County heat mainly with wood or propane, close to the Illinois county median of 16.5%.
With 38 muggy nights a year, mold in Livingston County can appear within days of a leak. Dry first, then clean.
Local risk profile
Livingston County covers 1,044 square miles of northeast Illinois, with about 35,565 residents and 15,930 homes. Pontiac is the county seat; Dwight, Fairbury and Chatsworth are the next largest communities. The county's median home was built in 1961.
54/100 Water Damage Risk Index: Elevated Livingston County ranks 36 of 102 Illinois counties. See the statewide ranking and method.The three factors where Livingston County ranks highest compared with other Illinois counties.
Livingston is on the colder side of Illinois for pipes. From 2015–2024 it averaged 42 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 116 nights at or below 32°F. That ranks 27th of 102 counties.
Cold snaps are the real risk. The worst in the record lasted 19 days below freezing (ending March 2015), and the low bottomed out near -22°F on January 30, 2019.
The freeze season here runs November to March, with January the coldest. If you travel then, leave the thermostat at 55°F or above and open sink cabinets on outside walls.
On average the first fall freeze arrives around Oct 26 and the last spring freeze around Apr 22.
Livingston gets fewer downpours than most Illinois counties, but they still fill basements. About 6.9 days a year bring an inch or more (85th of 102), most often in June, out of 39.3 inches of total precipitation. On September 28, 2019, 3.61 inches fell in a single day. Multi-day storms matter most for basements; the wettest three days on record here totaled 4.76 inches (through September 30, 2019).
The temperature crosses 32°F in both directions on roughly 86 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
Roughly 75% of the county's housing was built before 1980. That puts Livingston among the oldest housing stocks of Illinois's 102 counties.
49% 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
Livingston County averages 38 warm, muggy nights a year (lows of 65°F or more) and gets the most rain in June. 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 expectMain heating fuel in Livingston County's occupied homes: 68% utility gas, 14% electric, 14% propane and 1% 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 Livingston County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Grundy and LaSalle get more pipe-freeze nights than Livingston. Ford County has the oldest housing nearby, with 82% of homes built before 1980.
By the numbers
| Factor | Livingston | Illinois median | Rank |
|---|---|---|---|
| Homes built before 1960 | 49% | 38% | 19 of 102 |
| Homes built before 1980 | 75% | 66% | 22 of 102 |
| Homes built 2000 or later | 10% | 15% | 79 of 102 |
| Manufactured or mobile homes | 5.7% | 5.6% | 50 of 102 |
| Vacant homes | 8.3% | 11% | 75 of 102 |
| Wood or propane heat | 16% | 17% | 58 of 102 |
| Nights at 20°F or colder | 42/yr | 35/yr | 27 of 102 |
| Days with 1 inch+ of rain | 6.9/yr | 8.4/yr | 85 of 102 |
| Freeze-thaw days | 86/yr | 81/yr | 27 of 102 |
| Muggy nights (65°F+) | 38/yr | 51/yr | 78 of 102 |
Rank 1 is the highest value. Bars run from the lowest to the highest Illinois county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Livingston County: freezing from November to March, heavy rain in June, July and August.
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