Rosedale Water Hardness & Quality Report (2026)
Water Hardness
8.5 grains per gallon
Source
mixed
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
412.7 mg/L
Est. Daily Cost
$0.39
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 Rosedale, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Rosedale | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.8 yrs | 8.5 yrs | -44% |
| Washing Machine | 8.2 yrs | 12 yrs | -32% |
| Water Heater | 9.8 yrs | 15 yrs | -35% |
Regional Water Comparison
How Rosedale compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Rosedale, California | 145.5 mg/L | 6.1 ppt | 🟠 Hard | mixed |
| Bakersfield, California | 70.5 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| Oildale, California | 168 mg/L | 6.8 ppt | 🟠 Hard | mixed |
| Shafter, California | 34 mg/L | 2.9 ppt | 🟢 Soft | mixed |
| Lamont, California | 101 mg/L | 4.8 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Rosedale compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rosedale | 145.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Rosedale's Water Unique?
Local geology and source profile
Rosedale, California, in Kern County — an unincorporated Kern County community adjacent to Bakersfield and Shafter in the south San Joaquin Valley — receives its water from the Rosedale-Rio Bravo Water Storage District, drawing from the State Water Project and Kern River groundwater blend (Kern County) through the south San Joaquin Valley distribution.
The moderately hard 145.5 mg/L hardness and TDS of 412.7 mg/L (TDS elevated relative to hardness — reflecting the San Joaquin Valley alluvial deposits' evaporitic sulfate and sodium dissolution) reflect the south California Kern County San Joaquin Valley supply's moderate calcareous character. The Kern County water supply draws from — State Water Project Northern California (very soft Sierra Nevada — dilutant), Kern River Sierra Nevada granite drainage (slightly calcareous), and Quaternary San Joaquin Valley alluvial fan deposits (calcareous-evaporitic — primary hardness and TDS contributor).
At 145.5 mg/L with elevated TDS 412, Rosedale's water is moderately hard. A water softener is recommended and a reverse osmosis system for drinking water is advisable due to elevated TDS. The PFAS level of 6.1 ppt warrants a certified drinking water filter — Edwards Air Force Base (Kern County — AFFF) and the Kern County agricultural-industrial corridor contribute to Rosedale's readings.
Geology & Source: Rosedale in Kern County draws from the Rosedale-Rio Bravo Water Storage District on State Water Project and Kern River groundwater blend (Kern County, south-central California) — the SWP and Kern River drain the Sierra Nevada granite (insoluble — dilutant) with Quaternary San Joaquin Valley alluvial calcareous-evaporitic dissolution — California Kern County San Joaquin Valley SWP-alluvial blend produces moderately hard water at 145.5 mg/L with TDS 412.7 mg/L.