Carter County, Tennessee · Elizabethton
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Carter County averages 18 nights a year at 20°F or colder, mostly November to March, and 29% of its homes predate 1960.
Heavy rain days of an inch or more come about 8.5 times a year here, most often in October. A sump pump that hasn't run since last season is a common weak point.
29% 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 Carter County, 3.94 inches fell on the wettest day of the 2015–2024 record. Storms like that, and ice dams in snowy winters, cause most roof leaks.
10% of occupied homes in Carter County heat mainly with wood or propane, above the Tennessee county median of 7.8%.
Muggy summer nights, lows of 65°F or more, come about 8 times a year in Carter County. Mold after a leak spreads fastest from June through August.
Local risk profile
Carter County covers 341 square miles of northeast Tennessee, with about 56,712 residents and 28,118 homes. Besides Elizabethton, the county seat, the biggest communities are Valley Forge, Pine Crest and Central. The county's median home was built in 1977.
60/100 Water Damage Risk Index: Elevated Carter County ranks 19 of 95 Tennessee counties. See the statewide ranking and method.The three factors where Carter County ranks highest compared with other Tennessee counties.
Carter is on the colder side of Tennessee for pipes. From 2015–2024 it averaged 18 nights a year at 20°F or colder, the range where pipes in exterior walls, crawl spaces and unheated garages freeze, and 92 nights at or below 32°F. That ranks 3rd of 95 counties.
Cold snaps are the real risk. The worst in the record lasted 8 days below freezing (ending January 2018), and the low bottomed out near -6°F on February 20, 2015.
Most freezing nights fall from November to March, peaking in January. Disconnect garden hoses and shut off outdoor spigots before the first hard frost, and keep the heat at 55°F or higher if you'll be away.
On average the first fall freeze arrives around Oct 26 and the last spring freeze around Apr 20.
Carter gets fewer downpours than most Tennessee counties, but they still fill basements. Of roughly 52.8 inches of yearly precipitation, the damage comes from the 8.5 days a year with an inch or more, ranked 90th of 95. February, May and October see the most. The single wettest day in the record: 3.94 inches, September 26, 2024. Multi-day storms matter most for basements; the wettest three days on record here totaled 7.85 inches (through September 28, 2024).
Freeze-thaw days, below freezing overnight and above it by afternoon, come about 85 times a year here. They're the main driver of ice dams and of water working its way through foundation cracks in late winter.
Housing
Roughly 55% of the county's housing was built before 1980. That puts Carter among the oldest housing stocks of Tennessee's 95 counties.
In Carter County 29% of homes are older than 1960. If yours is one of them and the plumbing has never been replaced, expect galvanized steel supply pipe and cast iron drain lines, the two materials most likely to fail quietly.
27% 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.
Manufactured and mobile homes make up 18% 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.
Beyond water
Carter County averages 8 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 expectMain heating fuel in Carter County's occupied homes: 10% utility gas, 76% electric, 6% propane and 5% wood. Wood heat is more common here than the state median. Have chimneys swept and fuel-burning appliances serviced each fall, and keep three feet clear around stoves and space heaters.
Fire and smoke cleanup: first stepsCoverage
Calls connect to restoration companies that work across Carter County. The largest communities by population:
Population from ACS 2020-2024 5-year estimates. Townships and unincorporated areas are covered too.
Nearby
Johnson and Unicoi get more pipe-freeze nights than Carter. Unicoi County has the oldest housing nearby, with 57% of homes built before 1980.
By the numbers
| Factor | Carter | Tennessee median | Rank |
|---|---|---|---|
| Homes built before 1960 | 29% | 16% | 2 of 95 |
| Homes built before 1980 | 55% | 41% | 9 of 95 |
| Homes built 2000 or later | 18% | 27% | 88 of 95 |
| Manufactured or mobile homes | 18% | 16% | 41 of 95 |
| Vacant homes | 13% | 12% | 37 of 95 |
| Wood or propane heat | 10% | 7.8% | 38 of 95 |
| Nights at 20°F or colder | 18/yr | 11/yr | 3 of 95 |
| Days with 1 inch+ of rain | 8.5/yr | 14/yr | 90 of 95 |
| Freeze-thaw days | 85/yr | 60/yr | 2 of 95 |
| Muggy nights (65°F+) | 8/yr | 74/yr | 93 of 95 |
Rank 1 is the highest value. Bars run from the lowest to the highest Tennessee county; the tick marks the median; orange means higher water damage risk than the median, green means lower.
Questions
Peak risk months in Carter County: freezing from November to March, heavy rain in February, May 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