West Jordan’s newest water report puts the city’s average hardness at 182.7 mg/L, or about 10.7 gpg. That’s in the USGS “very hard” range, and it’s enough to build scale in any tankless heater over a year of use. Most West Jordan homes without a softener should have the heater flushed every year. Takagi, A.O. Smith and Bosch owners are over their manuals’ limits and should consider treatment too.
Mostly district water, with a little from city wells
West Jordan’s 2026 Water Quality Consumer Confidence Report says about 93% of the city’s water comes from the Jordan Valley Water Conservancy District. That share is treated water from district sources, including mountain reservoirs, springs and wells. The remaining 7% comes from groundwater wells the city owns.
Unlike neighbors that buy every drop from the district, West Jordan runs a small supply of its own. The report doesn’t publish hardness for those wells separately. What it gives is one average for the system as a whole.
West Jordan’s numbers next to the district’s
Put the city’s figures beside the district’s own 2025 report and they’re almost the same:
| Measure | West Jordan report | Jordan Valley report |
|---|---|---|
| Average hardness | 182.7 mg/L | 182.4 mg/L |
| Average dissolved solids | 281.2 mg/L | 281 mg/L |
That closeness makes sense when district water makes up the great majority of the supply. It also means West Jordan’s average is a fair number to plan around.
Total dissolved solids (TDS) and hardness aren’t the same thing. TDS counts all dissolved minerals; hardness counts only the calcium and magnesium that leave scale behind. The table shows both because each report lists both.
Your heater against the average
Here’s how about 10.7 gpg compares with what manufacturers publish:
- Navien allows up to 12 gpg. West Jordan’s average is under that, but not by much. Navien recommends descaling at least once a year, and more often with higher temperature settings or heavy hot-water use.
- Rinnai lists 200 ppm in its SENSEI manual. West Jordan’s average in mg/L is a little below it.
- Bosch sets 100 ppm, which West Jordan water is well past.
- Takagi (7 gpg) and A.O. Smith (7 gpg) are also well past.
The average hides some variation. West Jordan’s report gives a range around it, and individual samples run higher, so a heater can see harder water than the headline number at times. That’s one more reason a yearly flush is the floor, not the ceiling.
What’s typical in West Jordan homes
The water data says a few useful things about West Jordan households.
Because the supply is so heavily district water, most of the city is likely on similar water, though the report doesn’t say which areas the city’s own wells feed. A schedule that works for one West Jordan home is a fair baseline for another. Heavy users, such as large households or homes with the heater set high, should shorten it.
If your heater has a service reminder turned on, it’s often the first warning you’ll get. Navien’s E760, for instance, is a flushing/service alarm (time for routine service). Our no hot water page covers what scale looks like once it’s further along.
A well-kept tankless heater can last a long time. HomeGuide gives 15 to 20 years, and on water this hard, regular flushing helps a heater toward the long end of that range.
Replacing an older heater
If a West Jordan heater is past saving, the replacement may qualify for a utility rebate. Enbridge Gas, formerly Dominion Energy, runs the ThermWise program, which offers $300 for a qualifying gas tankless heater. The unit has to be ENERGY STAR certified, and the rebate request has to be postmarked within six months of the installation date. Ask the installer for the model number and invoice you’ll need, and call the ThermWise hotline at 1-877-932-0610 with eligibility questions.
What to have ready when you call
A technician can quote faster with a few details: the brand and model on the heater’s label, any code on the display, whether there are isolation valves on the water lines below the unit, whether a softener feeds it, and roughly when it was last flushed. A photo of the heater and its plumbing answers most of those at once.
Services available in West Jordan
- Tankless flush and descale: the routine fix for very hard district water.
- Annual maintenance visit: flush, filter and a full check, booked once a year.
- Tankless repair: codes, lukewarm water, or a heater that won’t fire.
- Installation and replacement: including tank-to-tankless conversions and the ThermWise rebate.
- Scale prevention: softeners and cartridges, especially for brands whose limits West Jordan water exceeds.
Tankless flushes cost more than tank flushes: Angi puts the difference at $75 to $100, and HomeAdvisor’s range for the tankless job is $150–$250.