Soledad Water Hardness & Quality Report (2026)
Water Hardness
10 grains per gallon
Source
mixed
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
518 mg/L
Est. Daily Cost
$0.45
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 Soledad, your appliances are currently losing 23% efficiency due to mineral buildup.
| Appliance | In Soledad | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4 yrs | 8.5 yrs | -53% |
| Washing Machine | 7.3 yrs | 12 yrs | -39% |
| Water Heater | 8.8 yrs | 15 yrs | -41% |
Regional Water Comparison
How Soledad compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Soledad, California | 170.5 mg/L | 7 ppt | 🟠 Hard | mixed |
| Greenfield, California | 71 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| King City, California | 153.5 mg/L | 6.5 ppt | 🟠 Hard | mixed |
| Salinas, California | 134 mg/L | 5.9 ppt | 🟠 Hard | mixed |
| Hollister, California | 118.5 mg/L | 5.4 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Soledad compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Soledad | 170.5 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Soledad's Water Unique?
Local geology and source profile
Soledad, California, in Monterey County in the heart of the Salinas Valley, receives its municipal water from the City of Soledad Public Works Department, which draws from groundwater wells tapping the Salinas Valley Groundwater Basin — one of the most productive and most overdrafted agricultural aquifer systems in California. The Salinas Valley is a broad alluvial valley between the Santa Lucia Range and Diablo Range, and its groundwater basin provides irrigation and municipal supply to California's premier vegetable-growing region. Soledad's wells access the shallow unconfined and deeper confined alluvial aquifer zones beneath the valley floor.
The hard 170.5 mg/L hardness reflects the mineral richness of the Salinas Valley Groundwater Basin. The alluvial aquifer is composed of Quaternary sediments derived from erosion of both the Santa Lucia Range (to the west, with Cretaceous marine sedimentary rocks) and the Diablo Range (to the east, with Franciscan Complex melange including marine shale and chert). Calcareous marine sediments from the western Coast Range contribute calcium carbonate to the aquifer, while deep basin sediments from Pliocene lacustrine and marine deposits add additional mineral load. The high TDS of 518 mg/L reflects the valley's extensive agricultural irrigation cycling, which concentrates dissolved salts.
At 170.5 mg/L, Soledad's water is hard, producing consistent mineral-related effects for residents. Scale forms steadily in kettles, coffee machines, and water heaters, and the elevated TDS contributes a pronounced mineral taste in drinking water. Faucet aerators and showerheads accumulate deposits requiring regular cleaning. Monthly descaling of heating appliances is recommended. An under-sink reverse osmosis system is an effective and popular choice in Soledad — it addresses both the mineral taste from high TDS and the hardness simultaneously, and provides cleaner water for cooking and drinking than unfiltered tap in this valley floor community.
Geology & Source: Soledad in Monterey County draws from the Salinas Valley Groundwater Basin — a deep alluvial aquifer in the Salinas River valley where Quaternary marine terrace sediments and alluvial fans derived from Cretaceous and Tertiary Coast Range formations contain calcareous marine sediments and calcareous cement — hard water at 170.5 mg/L with elevated TDS from deep basin mineral enrichment.