Bozeman, Montana Water Outage Today

Bozeman tap water system, by the numbers

The system behind most taps in Bozeman is City of Bozeman, which EPA records list as serving roughly 56,000 people. Customers know it as City of Bozeman Water; the name on your bill is the one to call.

Where Bozeman's tap water comes from

Tap water in Bozeman starts as surface water. City of Bozeman takes it from the Sourdough Creek and the At Hyalite Creek and runs it through treatment before it reaches the mains. After treatment the water is held in 4 storage tanks and reservoirs and pushed uphill by 2 pump facilities; that storage is the buffer that keeps taps running for a few hours after a pump or main fails.

What this means in an outage. A surface-water system depends on its plant staying online. If the plant, the raw-water pumps or the power feeding them fails, pressure can fall across the entire service area at once, and a precautionary boil notice tends to cover whole zones rather than the single street of a main break.

Main breaks and shutoffs in Bozeman: the usual causes

These are the causes that match the record for Bozeman, listed roughly in order of how much they matter here.

• Freezing weather. Bozeman sees about 214 days a year with a low at or below 32°F, and 117 days at or below 20°F. The coldest morning in the 2015 through 2025 record came on December 22, 2022. The longest stretch with highs that never rose above freezing ran 42 days, ending January 8, 2017. Frozen service lines and meters cause single-address outages, while ground frost and thaw cycles crack older mains and produce the street-wide breaks.
• Younger pipe, different risks. Only 20.9% of occupied homes in Bozeman predate 1970 (US 35.5%), so more of the network is newer plastic or ductile iron. Breaks tend to come from construction damage, pressure surges and weather rather than age.
• Digging and utility work. Street projects, fiber installation and excavation near buried pipe regularly cut mains in Bozeman with no warning, usually on a day with perfectly ordinary weather.
• One-address problems. A closed valve, a meter swap or a failed regulator can leave a single house dry. Compare notes with a neighbor first; if they have water too, start with your own plumbing.

Bozeman weather and water-main stress, 2015–2025

Main break season in Bozeman runs from late fall into early spring, with the coldest stretch around December through February.

A note on the numbers: they are modeled for the city center and averaged over eleven years, so they show how often Bozeman sees each kind of weather, not what any one thermometer read on a given day.

Boil water advisories and the federal violation record for Bozeman

Since 2015, EPA's record for City of Bozeman shows no health-based violations.

A boil water notice in Bozeman is a separate thing from a violation. City of Bozeman Water issues one when pressure falls low enough for contamination to enter the pipes, after a main break is repaired, or when a routine test comes back positive. The Montana Department of Environmental Quality (DEQ) oversees the process, and the notice stays until clean samples come back, usually a day or two after pressure returns.

What the lead tests and housing age say about Bozeman

The most recent 90th-percentile lead result filed for City of Bozeman is 1.6 ppb (2025). The federal action level is 15 ppb, so that result is comfortably below it.

20.9% of occupied homes in Bozeman were built before 1970, and lead service lines and solder stayed legal until the federal ban in 1986. After any outage that disturbs the pipes, run the cold tap 30 seconds to 2 minutes before drinking, and ask City of Bozeman Water about its lead service line inventory.

When will the water come back on in Bozeman?

Most repairs of an ordinary main break in Bozeman take half a day once the crew is on site. Bigger mains, deep bury and busy roads stretch that to a day or more.

For a break that affects many customers, City of Bozeman Water usually posts an estimated restoration time. When you call, ask the dispatcher what the crew has told them.

Emergency water storage for Bozeman households

Census figures put the typical Bozeman household at about 2.3 people. At one gallon per person per day that is 7 gallons for three days or 33 gallons for a two-week supply.

• 55.3% of households rent. Tell your landlord or property manager about a leak or outage right away, since the shutoff valve may be theirs.
• Your water heater tank holds 30 to 50 gallons of clean water. Turn off the power or gas to it first, then drain from the valve at the bottom.
• Fill a tub or large containers early for toilets, cleaning and handwashing, and store drinking water separately in clean bottles.

Water systems near Bozeman, side by side

Water outage pages for nearby cities

Billings, MT · Great Falls, MT · Idaho Falls, ID · Missoula, MT