Laguna Water Hardness & Quality Report (2026)
Water Hardness
3.3 grains per gallon
Source
mixed
pH Level
7.4
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
124.8 mg/L
Est. Daily Cost
$0.15
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, your appliances are currently losing 8% efficiency due to mineral buildup.
| Appliance | In Laguna | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.7 yrs | 8.5 yrs | -9% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 13.3 yrs | 15 yrs | -11% |
Regional Water Comparison
How Laguna compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Laguna, California | 56.5 mg/L | 3.6 ppt | 🟢 Soft | mixed |
| Elk Grove, California | 50.5 mg/L | 3.5 ppt | 🟢 Soft | mixed |
| Florin, California | 109 mg/L | 5.2 ppt | 🟡 Moderately Hard | mixed |
| Parkway, California | 155.5 mg/L | 6.5 ppt | 🟠 Hard | mixed |
| Vineyard, California | 82 mg/L | 4.4 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Laguna compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Laguna | 56.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Laguna's Water Unique?
Local geology and source profile
Laguna, California — a community in Santa Barbara County or San Luis Obispo County on the Central Coast (likely Los Alamos area or the unincorporated Santa Barbara County Laguna community) — draws its municipal water supply from local reservoir and State Water Project (Nacimiento) imports. Water hardness in Laguna measures 56.5 mg/L — classified as moderately soft.
Laguna's moderate softness reflects the Central Coast watershed's calcium-poor Salinian Block geology. The Central Coast Santa Barbara–San Luis Obispo watershed drains the Transverse Ranges and Santa Ynez Mountains — the Cretaceous Salinian Block granodiorite and gneiss (the Salinian terrane's calcium-poor crystalline geology of the California Coast Ranges). State Water Project Nacimiento Reservoir water (from the Santa Lucia Range calcareous-moderate watershed) blends with local Laguna area surface supplies. The Salinian Block watershed's calcium-poor crystalline terrain, combined with State Water Project blending, produces the moderate 56.5 mg/L at Laguna.
With hardness at 56.5 mg/L, Laguna residents enjoy moderately soft water with minimal scale challenges. The local water agency consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Reservoir supply from the Laguna Lake (San Luis Obispo Creek watershed) and State Water Project (Nacimiento Reservoir import) via the City of San Luis Obispo Utilities or Santa Barbara County Water Agency — the Santa Barbara–San Luis Obispo Central Coast (Cretaceous–Eocene Salinian Block calcareous-poor granodiorite watershed); very soft supply at 56.5 mg/L — reflecting the Central Coast Salinian watershed's calcium-poor characteristics.