Sioux City Water Restoration / Frozen and burst pipes
Frozen and burst pipes in Sioux City
A Sioux City winter finds the cold spots in a house. Pipes along the rim joist in the basement, a kitchen sink on a north wall, and the line to the garage are the usual ones. The water often shows up days later, when the weather breaks.
How cold it gets here
NOAA's normals for Sioux City Gateway Airport show about 154 nights a year at or below freezing. About 79 of those get to 20 degrees or colder, and about 16 drop to zero or below. January averages a low of about 10. Pipes that are fine in a normal cold snap can freeze in a week of that, especially with wind coming across open ground.
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See what it might costWhat you own and what the city owns
The City of Sioux City's rule is simple. The property owner is responsible for the water service line from the connection at the city main all the way into the house, up to the meter or the main shutoff. The city doesn't repair that line. Everything past the meter is yours too.
The city's utilities number is 712-279-6164. Call it if you see water coming up out of the ground or the pavement in the street, which usually means a main break. The city says freeze and thaw cycles that shift the ground in winter and spring are one of the most common causes of those breaks.
Where pipes freeze in Sioux City houses
- Along the top of the basement wall, where the house frame sits on the foundation. That rim joist is often the least insulated part of the house.
- In a kitchen or bath on an outside wall, especially one facing north or west into the wind.
- In an attached garage or a crawlspace under an addition.
- The line to an outside faucet that wasn't shut off and drained from inside before winter.
About a third of the homes in Sioux City were built before 1940, according to the Census Bureau's 2024 survey. Older houses often have plumbing that was rerouted over the years, sometimes through spots that were never meant to stay warm.
No water at all
If every faucet in the house stops at once in a deep cold snap, the freeze may be in the service line or near the meter. Don't try to thaw that with heat in the basement. Call a plumber. If you aren't sure whether it is your line or a problem in the street, the city utilities number can tell you if there is an outage.
Thawing one line
If it is one faucet, open it and warm the pipe with a hair dryer or a space heater, working from the faucet back toward the cold spot. Never use a torch. Watch the pipe as it thaws. If it split, it will start leaking the moment the ice lets go, and you'll want to get to the shutoff fast.
Drying the basement after a burst
Burst pipe water is clean when it starts. In a finished basement it runs under carpet, soaks the pad, and wicks up drywall and the bottom plate of each wall. The crew pulls wet pad, cuts drywall where the meter shows it is wet, and dries the framing and the slab with dehumidifiers and air movers. Winter air in Sioux City is dry, which helps, but the slab and the framing still hold water until they are dried on purpose.
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Questions
Who fixes the water line from the street to my house in Sioux City?
The owner. The city says the property owner is responsible for the service line from the city main to the meter or main shutoff inside the house.
Should I leave faucets dripping in a cold snap?
On lines you know are at risk, a thin, steady drip helps, because moving water is slower to freeze. Opening the cabinet doors under sinks on outside walls helps too.
How do I know if a pipe froze or burst?
A frozen pipe gives little or no water at the faucet. A burst one leaks, but often not until it thaws. Check the area around any pipe that froze once the weather warms up.