Half of Broomfield's homes were built in the last 25 years. A lot of their original water heaters are reaching the end at the same time.
Broomfield water heaters at a glance
| Water provider | City and County of Broomfield, blending its own treated Colorado–Big Thompson water with water bought from Denver Water |
|---|---|
| Water hardness | 25 to 130 mg/L in 2025 (1.5 to 7.3 grains per gallon), depending on the blend |
| Homes | Median year built 2002 |
| Elevation | About 5,391 feet (USGS reference point) |
| For your water heater | Scale comes and goes with the water source. Flush yearly; if fixtures scale up at certain times of year, that's the harder water. |
Sources: Broomfield 2025 water quality report · Census ACS 2019–2023 via Point2Homes · USGS elevation. Checked October 2026.
What Broomfield's water does to a water heater
When water is heated, the calcium and magnesium in it drop out as sediment and settle on the bottom of the tank. The burner or lower element then has to heat through that layer, so the heater runs longer, pops and rumbles, and wears faster. Broomfield's water ran from 25 to 130 mg/L of hardness in 2025 (1.5 to 7.3 grains per gallon), depending on how much Denver Water it blended in. Scale comes and goes with the water source. Flush yearly; if fixtures scale up at certain times of year, that's the harder water.
When a whole neighborhood ages at once
In the Broadlands, Wildgrass, Anthem, and the other subdivisions that went up around the same time, houses got similar builder-grade water heaters in the same few years. A tank typically lasts about 8 to 12 years, so any original heater from that building boom is living on borrowed time. If your neighbors are replacing theirs, check the date on yours. Broomfield's water also changes with the blend, from soft to moderately hard, so scale shows up in some seasons more than others.
Repair or replace?
Under about eight years old, with a failed part like a thermocouple, gas valve, heating element, or thermostat, a repair usually makes sense. At about ten years or older, or with any leak from the tank itself, replacement is the better money: a leaking tank can't be fixed. You get the price before any work starts, and most replacements are done the same day they're quoted, with the old unit hauled away. A replacement is also the time to check whether you need an expansion tank (when one is required).
Gas or electric, tank or tankless
We repair and replace both gas and electric water heaters, standard tanks and tankless units. Tankless works well here, but plan on descaling at least once a year, because the harder blends still leave scale in the heat exchanger.
At about 5,391 feet (Broomfield's USGS reference point), a gas water heater has to be rated for the altitude, and a tankless heater set for it at installation. Rinnai and Navien change their tankless settings at 5,400 feet, and elevations vary across the city, so the setting should match your address. What to check at altitude.
Make the next one last
- Flush the tank once a year
- Check the anode rod every few years
- Descale a tankless unit at least once a year
- Know where the cold-water shutoff on top of the heater is, and how to turn the heater off, before you need to
More reading: water heater leaking? what to do, no hot water troubleshooting, how long water heaters last in Colorado, why a water heater pops or rumbles, and water hardness by city. If your water is hard, a softener protects the heater and every fixture.
Recent water heater work
Photos from our own jobs. Locations and customer details are left out.
More in Broomfield: backflow testing in Broomfield · all plumbing services in Broomfield