Desert Hot Springs Water Hardness & Quality Report (2026)
Water Hardness
9.8 grains per gallon
Source
mixed
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
502.4 mg/L
Est. Daily Cost
$0.45
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Desert Hot Springs, your appliances are currently losing 22% efficiency due to mineral buildup.
| Appliance | In Desert Hot Springs | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.4 yrs | 12 yrs | -38% |
| Water Heater | 8.9 yrs | 15 yrs | -41% |
Regional Water Comparison
How Desert Hot Springs compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Desert Hot Springs, California | 168.5 mg/L | 6.7 ppt | 🟠 Hard | mixed |
| Palm Springs, California | 121 mg/L | 5.3 ppt | 🟠 Hard | mixed |
| Yucca Valley, California | 86 mg/L | 4.3 ppt | 🟡 Moderately Hard | mixed |
| Cathedral City, California | 171 mg/L | 6.8 ppt | 🟠 Hard | mixed |
| Rancho Mirage, California | 133 mg/L | 5.7 ppt | 🟠 Hard | mixed |
National Benchmark
How Desert Hot Springs compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Desert Hot Springs | 168.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Desert Hot Springs's Water Unique?
Local geology and source profile
Desert Hot Springs, California, in Riverside County — a major east California Coachella Valley spa and hot springs city (Desert Hot Springs is a significant Riverside County city — a Coachella Valley community directly north of Palm Springs across I-10 on the north slope of the Little San Bernardino Mountains; Desert Hot Springs is world-famous for its natural hot mineral springs (the Desert Hot Springs geothermal springs are among the most impressive natural hot springs in the American West — the springs are produced by hot water rising along the Mission Creek Fault (a splay of the San Andreas Fault system); the hot mineral water is a major tourism draw for Desert Hot Springs's significant resort and spa industry)), a diverse Riverside County community with a significant Hispanic-American, retiree and snowbird, and working-class population, adjacent to Palm Springs in the Coachella Valley corridor, home of numerous mineral water resort spas (Desert Hot Springs is one of the most spa-dense communities per capita in California), and a community defined by its unique geothermal landscape — draws its municipal water supply from the Coachella Valley aquifer via the Desert Hot Springs Water District. Water hardness in Desert Hot Springs measures 168.5 mg/L — classified as hard.
Desert Hot Springs's hard supply reflects the east California Coachella Valley desert aquifer's calcareous-moderate character. The Mission Creek Subbasin aquifer draws from Quaternary Colorado Desert alluvium (calcareous-moderate). Desert Hot Springs Water District applies limited softening, producing the hard 168.5 mg/L.
At 168.5 mg/L, Desert Hot Springs residents face regular hard water challenges. Monthly descaling and water softeners are recommended. Desert Hot Springs Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Mission Creek Subbasin (Coachella Valley) via the Desert Hot Springs Water District — the Riverside County Coachella Valley Desert Hot Springs corridor (Quaternary calcareous-moderate Colorado Desert alluvium and Precambrian calcareous-moderate gneiss — the calcareous-moderate east California closed-basin desert aquifer; limited softening); hard at 168.5 mg/L in Riverside County.