West Carson Water Hardness & Quality Report (2026)
Water Hardness
2.7 grains per gallon
Source
mixed
pH Level
7.3
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
96.7 mg/L
Est. Daily Cost
$0.12
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 West Carson, your appliances are currently losing 6% efficiency due to mineral buildup.
| Appliance | In West Carson | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.1 yrs | 8.5 yrs | -5% |
| Washing Machine | 11.9 yrs | 12 yrs | -1% |
| Water Heater | 13.8 yrs | 15 yrs | -8% |
Regional Water Comparison
How West Carson compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ West Carson, California | 46 mg/L | 3.2 ppt | 🟢 Soft | mixed |
| Carson, California | 137.5 mg/L | 5.9 ppt | 🟠 Hard | mixed |
| Lomita, California | 119 mg/L | 5.3 ppt | 🟡 Moderately Hard | mixed |
| Torrance, California | 63.5 mg/L | 3.7 ppt | 🟡 Moderately Hard | mixed |
| Wilmington, California | 166.5 mg/L | 6.7 ppt | 🟠 Hard | mixed |
National Benchmark
How West Carson compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ West Carson | 46 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes West Carson's Water Unique?
Local geology and source profile
West Carson, California, in Los Angeles County — an unincorporated South Bay community adjacent to the City of Carson, southwest of Torrance along the Avalon Boulevard corridor — receives its municipal water from the Dominguez Water Corporation or LA County Waterworks District, which draws primarily from the Metropolitan Water District of Southern California (MWD) through the State Water Project (SWP) supply. West Carson's supply is dominated by the State Water Project's Feather River-Delta source, producing characteristically soft water for the South Bay unincorporated corridor.
The very soft 46 mg/L hardness and low TDS of 96.7 mg/L are exceptionally soft for Los Angeles County — significantly softer than most LA Basin communities (South Pasadena 143 mg/L, Inglewood ~140 mg/L), reflecting West Carson's supply zone's near-exclusive dependence on the State Water Project Feather River supply (rather than the harder Colorado River Aqueduct blend). The SWP Feather River originates in the northern Sierra Nevada — draining the Feather River Canyon's Precambrian and Mesozoic crystalline terrain (Plumas County granodiorite, metamorphic basement) — and delivers very soft source water after transit through the Sacramento Valley Delta. In the South Bay distribution zone, Dominguez Water or the County Waterworks blends this SWP water with minimal local West Coast Basin groundwater, maintaining the characteristically soft SWP quality in West Carson.
At 46 mg/L, West Carson's water is very soft — excellent for all household applications. Scale forms very slowly, soap lathers abundantly, and the dishwasher produces clean results. Annual descaling of heating appliances is sufficient. The PFAS level of 3.2 ppt is favorable for the South Bay LA County corridor — the West Carson community's residential character, the nearby Dominguez Hills area's limited active industrial PFAS sources (though the South Bay industrial port corridor and the legacy Torrance-Carson refining complex contribute regional background), and the SWP supply's protected Feather River watershed all contribute to a modest PFAS reading.
Geology & Source: West Carson in Los Angeles County is served by Dominguez Water Corporation drawing from the Metropolitan Water District (MWD) State Water Project supply — the Feather River / Sacramento-San Joaquin Delta SWP source (Sierra Nevada granodiorite headwaters) delivers characteristically soft water with low mineral content — SWP-dominant supply produces very soft water at 46 mg/L with low TDS 97 mg/L in this South Bay unincorporated community.