Laguna Woods Water Hardness & Quality Report (2026)
Water Hardness
3.9 grains per gallon
Source
mixed
pH Level
7.4
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
152.2 mg/L
Est. Daily Cost
$0.18
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 Laguna Woods, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Laguna Woods | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.4 yrs | 8.5 yrs | -13% |
| Washing Machine | 11.1 yrs | 12 yrs | -8% |
| Water Heater | 12.9 yrs | 15 yrs | -14% |
Regional Water Comparison
How Laguna Woods compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Laguna Woods, California | 67.5 mg/L | 3.8 ppt | 🟡 Moderately Hard | mixed |
| Laguna Hills, California | 63.5 mg/L | 3.7 ppt | 🟡 Moderately Hard | mixed |
| Aliso Viejo, California | 72.5 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| Lake Forest, California | 76.5 mg/L | 4.1 ppt | 🟡 Moderately Hard | mixed |
| Mission Viejo, California | 173 mg/L | 6.9 ppt | 🟠 Hard | mixed |
National Benchmark
How Laguna Woods compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Laguna Woods | 67.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Laguna Woods's Water Unique?
Local geology and source profile
Laguna Woods, California, in Orange County — an Orange County city adjacent to Lake Forest and Aliso Viejo in the south Orange County Saddleback Valley — receives its municipal water from the Moulton Niguel Water District, drawing from the Metropolitan Water District of Southern California (MWD) — a blended supply of State Water Project (SWP) and Colorado River Aqueduct deliveries.
The moderately soft 67.5 mg/L hardness and TDS of 152.2 mg/L reflect the south Orange County MWD blended supply — softer than the most Colorado River-dominant supplies (Fontana: ~140 mg/L; San Bernardino: ~120 mg/L) due to the higher SWP proportion in south coastal Orange County. MWD delivers a blend of SWP water (soft Sierra Nevada snowmelt from insoluble Cretaceous granodiorite) and Colorado River Aqueduct water (harder, with Permian and Cretaceous carbonate loading from the Colorado Plateau). The SWP-dominant coastal blend produces the moderately soft supply.
At 67.5 mg/L, Laguna Woods' water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 3.8 ppt is low — the south Orange County coastal setting, while near the MWD supply network, is distant from major AFFF military sources and the south coastal California PFAS background is modest.
Geology & Source: Laguna Woods in Orange County draws from the Moulton Niguel Water District on the Metropolitan Water District supply (Orange County, south California) — MWD delivers blended SWP Sierra Nevada snowmelt (Cretaceous granodiorite) and Colorado River (Permian calcareous) — California Orange County MWD SWP-Colorado blend produces moderately soft water at 67.5 mg/L with TDS 152.2 mg/L in this Orange County California city.