Diamond Springs Water Hardness & Quality Report (2026)
Water Hardness
10.7 grains per gallon
Source
mixed
pH Level
8.3
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
576.6 mg/L
Est. Daily Cost
$0.49
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 Diamond Springs, your appliances are currently losing 25% efficiency due to mineral buildup.
| Appliance | In Diamond Springs | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.5 yrs | 8.5 yrs | -59% |
| Washing Machine | 6.8 yrs | 12 yrs | -43% |
| Water Heater | 8.2 yrs | 15 yrs | -45% |
Regional Water Comparison
How Diamond Springs compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Diamond Springs, California | 184 mg/L | 7.3 ppt | 🔴 Very Hard | mixed |
| Placerville, California | 135.5 mg/L | 5.9 ppt | 🟠 Hard | mixed |
| Cameron Park, California | 55.5 mg/L | 3.6 ppt | 🟢 Soft | mixed |
| El Dorado Hills, California | 187.5 mg/L | 7.5 ppt | 🔴 Very Hard | mixed |
| Auburn, California | 35 mg/L | 3 ppt | 🟢 Soft | mixed |
National Benchmark
How Diamond Springs compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Diamond Springs | 184 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Diamond Springs's Water Unique?
Local geology and source profile
Diamond Springs, California, in El Dorado County — an El Dorado County unincorporated community adjacent to Placerville and El Dorado Hills in the Sierra Nevada foothills — receives its water from the El Dorado Irrigation District (EIDD), drawing from the American River and local groundwater wells through the north-central California distribution.
The hard 184 mg/L hardness and high TDS of 576.6 mg/L reflect the El Dorado County foothills supply's hard calcareous-metamorphic character — the Triassic Calaveras Formation and Jurassic Amador Group are calcareous metamorphic formations in the Sierra Nevada foothills, and local groundwater wells concentrate dissolved mineral content from these ancient formations (compare Placerville CA: 180/566 in El Dorado County comparable; El Dorado Hills CA: 187/585 in El Dorado County comparable; Diamond Springs consistent hard from the same El Dorado County American River Triassic calcareous supply). The American watershed at El Dorado County — Triassic Calaveras Formation (calcareous — primary hardness contributor), Jurassic Amador Group (calcareous — secondary contributor), and Quaternary American River alluvium (calcareous — TDS contributor).
At 184 mg/L with TDS 577, Diamond Springs' water is hard — scale builds in appliances. Quarterly descaling is appropriate. The PFAS level of 7.3 ppt is elevated — a certified drinking water filter with PFAS removal is recommended. Review El Dorado Irrigation District's annual water quality report.
Geology & Source: Diamond Springs in El Dorado County draws from the El Dorado Irrigation District on the American River supply (El Dorado County, north California) — the American watershed draws from Triassic Calaveras Formation (calcareous) and Jurassic Amador Group (calcareous) — California El Dorado County American River Triassic calcareous supply produces hard water at 184 mg/L with TDS 576.6 mg/L.