Los Alamitos Water Hardness & Quality Report (2026)
Water Hardness
9 grains per gallon
Source
mixed
pH Level
8.1
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
442.7 mg/L
Est. Daily Cost
$0.41
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 Los Alamitos, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Los Alamitos | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.5 yrs | 8.5 yrs | -47% |
| Washing Machine | 7.9 yrs | 12 yrs | -34% |
| Water Heater | 9.5 yrs | 15 yrs | -37% |
Regional Water Comparison
How Los Alamitos compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Los Alamitos, California | 153.5 mg/L | 6.3 ppt | 🟠 Hard | mixed |
| Rossmoor, California | 154 mg/L | 6.4 ppt | 🟠 Hard | mixed |
| Hawaiian Gardens, California | 177.5 mg/L | 7 ppt | 🟠 Hard | mixed |
| Cypress, California | 74 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| La Palma, California | 45 mg/L | 3.2 ppt | 🟢 Soft | mixed |
National Benchmark
How Los Alamitos compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Los Alamitos | 153.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Los Alamitos's Water Unique?
Local geology and source profile
Los Alamitos, California, in Orange County — an Orange County city adjacent to Cypress and Seal Beach in the northwest Orange County coastal plain — receives its water from the Los Alamitos Water Department or Orange County Water District, drawing from the Santa Ana River basin and MWD of Southern California import through the south California distribution.
The hard 153.5 mg/L hardness and TDS of 442.7 mg/L reflect the Orange County supply's hard character — while Cretaceous Peninsular Ranges granite is insoluble, the blended Orange County supply includes groundwater from the Santa Ana River alluvial basin which acquires hardness from Tertiary marine sediments (compare Cypress CA: 150/435 in Orange County comparable; Seal Beach CA: 156/450 in Orange County comparable; Los Alamitos consistent hard from the same Orange County Santa Ana watershed Cretaceous granitic supply). The Santa Ana watershed at Orange County — Cretaceous Peninsular Ranges granite (insoluble — dilutant), Tertiary Puente Formation (slightly calcareous — primary hardness contributor), and Quaternary Santa Ana alluvium (calcareous — TDS contributor).
At 153.5 mg/L with TDS 443, Los Alamitos' water is hard — scale builds in appliances. Quarterly descaling is appropriate. The PFAS level of 6.3 ppt warrants a certified drinking water filter. Review the Orange County Water District's annual water quality report.
Geology & Source: Los Alamitos in Orange County draws from the Los Alamitos Water on the Orange County MWD supply (Orange County, south California) — the Santa Ana watershed drains Cretaceous Peninsular Ranges granite (insoluble) and Tertiary Puente Formation (slightly calcareous) — California Orange County Santa Ana watershed Cretaceous granitic supply produces hard water at 153.5 mg/L with TDS 442.7 mg/L.