Casper, Wyoming Water Outage Today
Live Casper water outage reports, City of Casper Utilities’s emergency line and the system’s federal record.
Weather data by Open-Meteo.com
No water outage reports in Casper, Wyoming in the last 24 hours
Who supplies water in Casper?
Drinking water in Casper, Wyoming is supplied by City of Casper Utilities, which handles outages, main breaks and boil water notices for the city.
Public water systems in Wyoming are regulated by the U.S. EPA Region 8 (Wyoming public water systems are overseen federally).
To report no water or a main break, call City of Casper Utilities at 307-235-8233.
Who runs the water in Casper: system profile
Federal records name City of Casper as the public water system for Casper, with about 59,000 people on its mains. Customers know it as City of Casper Utilities; the name on your bill is the one to call.
| Item | Detail |
|---|---|
| Water system in EPA records | City of Casper (WY5601415) |
| Run by | Local government |
| People served | 59,000 through 22,754 service connections |
| Source of the water | Purchased surface water |
| Active facilities listed by EPA | 17 storage tanks and reservoirs, 9 pump facilities |
| Connections to other systems | 1 |
| State regulator | U.S. EPA Region 8 (Wyoming public water systems are overseen federally) |
| Health-based violations since 2015 | 0 |
| Highest lead result (90th percentile) | 1 ppb, action level 15 ppb |
Source: EPA SDWIS (Safe Drinking Water Information System).
What feeds the taps in Casper
Casper does not collect its own raw water. City of Casper buys surface water from Central Wy Regional Water System Jpb and distributes it through its own mains. After treatment the water is held in 17 storage tanks and reservoirs and pushed uphill by 9 pump facilities; that storage is the buffer that keeps taps running for a few hours after a pump or main fails.
Why this matters when the water stops. Problems can start outside the city: if Central Wy Regional Water System Jpb has to shut a main or its plant, Casper can run short even though nothing is wrong with the local pipes. Follow alerts from the supplier and from City of Casper Utilities.
Main breaks and shutoffs in Casper: the usual causes
Water outages are local, so the likely cause depends on weather, pipe age and the grid. For Casper, these stand out.
- Freezing weather. Casper sees about 167 days a year with a low at or below 32°F, and 61 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 11 days, ending January 2, 2016. Frozen service lines and meters cause single-address outages, while ground frost and thaw cycles crack older mains and produce the street-wide breaks.
- Storm-driven power loss. Thunderstorm wind, hail and tornado reports in Natrona County number 115 since 2015. Pump stations and treatment plants that depend on Rocky Mountain Power run on the electric grid, so a storm that downs power lines can lower water pressure even when no pipe is damaged.
- Digging and utility work. Street projects, fiber installation and excavation near buried pipe regularly cut mains in Casper 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.
How weather strains the Casper water system
Main break season in Casper runs from late fall into early spring, with the coldest stretch around December through February.
| Measure | Value |
|---|---|
| Days a year at or below 32°F | 167.1 |
| Days a year at or below 20°F | 61.1 |
| Days a year with a high at or below 32°F | 29.3 |
| Days a year at or above 95°F | 10.4 |
| Days a year at or above 100°F | 0.3 |
| Days a year with an inch of rain or more | 0.2 |
| Average annual precipitation | 14.8 in |
| Wettest year | 2019 (18.7 in) |
| Driest year | 2020 (9.7 in) |
| Coldest day in the record | December 22, 2022 |
| Hottest day in the record | July 27, 2021 |
Source: NASA POWER daily reanalysis (MERRA-2) for the city center, 2015–2025.
Freezing days peak in January, averaging 30.7 a year. Source: NASA POWER reanalysis, 2015–2025.
The wettest year was 2019 with 18.7 inches; the driest was 2020 with 9.7. Source: NASA POWER reanalysis, 2015–2025.
These counts come from a gridded reanalysis, which smooths out single-day extremes and can differ by a few degrees from an airport thermometer. Use them to compare seasons and years, not as official station records.
Boil water advisories and the federal violation record for Casper
Since 2015, EPA's record for City of Casper shows no health-based violations.
When Casper loses pressure after a break or a failed test, City of Casper Utilities asks affected customers to boil water for drinking and cooking. The notice ends only after samples come back clean, which usually takes one to two days after service returns, and the U.S. EPA Region 8 (Wyoming public water systems are overseen federally) supervises the process.
Lead service lines and old plumbing in Casper
The most recent 90th-percentile lead result filed for City of Casper is 1 ppb (2023). The federal action level is 15 ppb, so that result is well under it.
Highest result on file: 1 ppb. Source: EPA SDWIS.
40.9% of occupied homes in Casper 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 Casper Utilities about its lead service line inventory.
How long a water outage lasts in Casper
Most repairs of an ordinary main break in Casper take half a day once the crew is on site. Bigger mains, deep bury and busy roads stretch that to a day or more.
| Situation | Typical time |
|---|---|
| Planned shutoff | The posted window, though crews often finish ahead of it |
| Ordinary main break | Half a day once the crew has isolated the pipe |
| Large or deep main | A day or two, sometimes three |
| Low pressure after a pump or power failure | As long as the outage itself, plus a few hours to refill tanks |
| Boil water notice after service returns | Until two clean rounds of samples, usually 1 to 2 days |
| Frozen service line or meter | Depends on thaw; a plumber is usually needed |
Source: Utility practice, EPA and state boil water guidance.
Ask City of Casper Utilities for a restoration estimate when you report the outage; for large breaks it is normally posted and updated as the repair progresses.
How much water to keep on hand in Casper
The average household in Casper has about 2.3 people, so FEMA's minimum of one gallon per person per day comes to roughly 7 gallons for three days and 32 gallons for two weeks.
- 4.1% of homes are mobile or manufactured homes, whose pipes are more exposed to freezing and have less room for a water heater tank as backup.
- 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 Casper, side by side
| City | System | People served | Source | Health violations since 2015 | Highest lead (ppb) |
|---|---|---|---|---|---|
| Casper, WY | City of Casper | 59,000 | Bought (surface) | 0 | 1 |
| Gillette, WY | City of Gillette | 32,222 | Ground | 0 | 7 |
| Laramie, WY | City of Laramie | 32,395 | Surface | 0 | 1.3 |
| Cheyenne, WY | Cheyenne Board of Public Utilities | 64,165 | Surface | 0 | 15 |
| Fort Collins, CO | City of Ft Collins | 179,901 | Surface | 1 | 5 |
Source: EPA SDWIS.
Water outage pages for nearby cities
Gillette, WY · Laramie, WY · Cheyenne, WY · Fort Collins, CO
Staying informed about water service in Casper
Sign up for alerts from City of Casper Utilities and check its website or social accounts when the water goes off. If a boil advisory is issued, the water outage guide covers how to treat water and when it is safe again.
Casper water outage questions
Who do I call about no water in Casper?
City of Casper Utilities at 307-235-8233, day or night. Use 911 only if a main break is flooding property or roads.
Where does Casper get its water?
Purchased surface water supplies Casper, according to EPA records for City of Casper. It buys from Central Wy Regional Water System Jpb.
Is Casper tap water safe to drink?
EPA lists no health-based violations for City of Casper since 2015, and its latest 90th-percentile lead result is 1 ppb against the 15 ppb action level. After a boil water notice, follow it until the utility lifts it.
When do water mains break most in Casper?
Breaks in Casper pile up in the cold, with about 167 freezing days a year and the worst stretch from December to February. The days right after a deep freeze, when the soil thaws and shifts, are usually the busiest.
Why is my water pressure low in Casper?
Low pressure often comes from a nearby main break, heavy demand on a hot evening, or a failed pressure regulator at your own home. If neighbors are affected too, report it to City of Casper Utilities; if only your home is, check the regulator and shutoff valve.
How long does a boil water notice last in Casper?
Typically a day or two. Bacteria tests take about 24 hours, so City of Casper Utilities cannot end a notice until clean samples come back; the U.S. EPA Region 8 (Wyoming public water systems are overseen federally) sets the rules for that process.
How much drinking water should I keep at home in Casper?
Store at least three days of water, and two weeks if you can. With about 2.3 people in a typical Casper home, that is roughly 7 and 32 gallons.
Does Casper have lead pipes?
Lead pipe was legal until 1986, and 40.9% of occupied homes in Casper predate 1970, so it is possible in older neighborhoods. City of Casper Utilities can tell you what your service line is made of; a lead-certified filter is a sensible precaution if you are unsure.
How do I check for water outages near me in Casper?
This page shows resident reports from Casper for the last 24 hours. For a street-by-street picture, use the alerts and outage page of City of Casper Utilities; many utilities also text boil notices.
More outage pages for Casper and nearby
Other outage types in Casper
Water Service Outages in cities near Casper
- Gillette, WY 106 mi · City of Gillette Utilities
- Laramie, WY 114 mi · City of Laramie Water
- Cheyenne, WY 142 mi · Cheyenne Board of Public Utilities
- Fort Collins, CO 170 mi · Fort Collins Utilities
- Rapid City, SD 176 mi · Rapid City Water Division
- Denver, CO 227 mi · Denver Water
Report counts are user-submitted; other figures name their official source. How our data works
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