Crestline Water Hardness & Quality Report (2026)
Water Hardness
2.2 grains per gallon
Source
mixed
pH Level
7.2
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
77.3 mg/L
Est. Daily Cost
$0.10
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 Crestline, your appliances are currently losing 5% efficiency due to mineral buildup.
| Appliance | In Crestline | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.3 yrs | 8.5 yrs | -2% |
| Washing Machine | 12.2 yrs | 12 yrs | — |
| Water Heater | 14.1 yrs | 15 yrs | -6% |
Regional Water Comparison
How Crestline compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Crestline, California | 38 mg/L | 2.9 ppt | 🟢 Soft | mixed |
| Lake Arrowhead, California | 71 mg/L | 3.9 ppt | 🟡 Moderately Hard | mixed |
| Muscoy, California | 147.5 mg/L | 6.1 ppt | 🟠 Hard | mixed |
| San Bernardino, California | 166 mg/L | 6.7 ppt | 🟠 Hard | mixed |
| Highland, California | 83.5 mg/L | 4.3 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Crestline compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Crestline | 38 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Crestline's Water Unique?
Local geology and source profile
Crestline, California, in San Bernardino County — a San Bernardino County unincorporated mountain community adjacent to Lake Arrowhead and Running Springs in the San Bernardino Mountains — receives its water from the Crestline-Lake Arrowhead Water Agency, drawing from the Deep Creek watershed through the San Bernardino Mountains distribution.
The very soft 38 mg/L hardness and low TDS of 77.3 mg/L reflect the San Bernardino Mountains supply's very soft granite character — the Precambrian San Bernardino Mountains Granite and Jurassic Transverse Ranges Plutonic are largely insoluble intrusive rocks contributing negligible dissolved mineral content to the mountain watershed (compare Lake Arrowhead CA: 36/72 in San Bernardino County comparable; Running Springs CA: 39/80 in San Bernardino County comparable; Crestline consistent very soft from the same San Bernardino County Deep Creek Precambrian insoluble supply). The Deep Creek watershed — Precambrian San Bernardino Mountains Granite (insoluble — primary dilutant), Jurassic Transverse Ranges Plutonic (insoluble — secondary dilutant), and Quaternary San Bernardino Mountains colluvium (slightly calcareous — minimal TDS).
At 38 mg/L with TDS 77, Crestline's water is very soft — virtually no scale buildup. Soft water can be mildly corrosive — monitor for copper staining. The PFAS level of 2.9 ppt is low — a clean result for the San Bernardino Mountains. Review Crestline-Lake Arrowhead Water Agency's annual water quality report.
Geology & Source: Crestline in San Bernardino County draws from the Crestline Lake Arrowhead Water on the Deep Creek watershed (San Bernardino County, San Bernardino Mountains California) — the San Bernardino Mountains draw from Precambrian San Bernardino Mountains Granite (insoluble) and Jurassic Transverse Ranges Plutonic (insoluble) — California San Bernardino County Deep Creek Precambrian insoluble supply produces very soft water at 38 mg/L with TDS 77.3 mg/L.