Prunedale 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
153.2 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 Prunedale, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Prunedale | 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 Prunedale compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Prunedale, California | 67 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| Salinas, California | 134 mg/L | 5.9 ppt | 🟠 Hard | mixed |
| Watsonville, California | 182 mg/L | 7.3 ppt | 🔴 Very Hard | mixed |
| Marina, California | 124 mg/L | 5.6 ppt | 🟠 Hard | mixed |
| Seaside, California | 150.5 mg/L | 6.4 ppt | 🟠 Hard | mixed |
National Benchmark
How Prunedale compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Prunedale | 67 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Prunedale's Water Unique?
Local geology and source profile
Prunedale, California, in Monterey County — an unincorporated Monterey County community adjacent to Castroville and Salinas in the north Salinas Valley — receives its municipal water from the Prunedale Mutual Water Company and local water agencies, drawing from local wells in the north Salinas Valley alluvial aquifer.
The soft 67 mg/L hardness and TDS of 153.2 mg/L reflect the north Salinas Valley mixed groundwater supply. The Salinas Valley aquifer is developed in Quaternary alluvial fill from the Santa Lucia Range (Jurassic Franciscan Complex — insoluble mafic melange), the Cretaceous Aromas Red Sands (insoluble quartz-rich), and Pleistocene marine terrace deposits. The predominantly insoluble Franciscan and Cretaceous quartz source rocks produce the soft water, while the slightly elevated TDS relative to hardness may reflect minor agricultural irrigation return water ion loading in the Salinas Valley.
At 67 mg/L, Prunedale's water is soft — essentially no scale forms, soap lathers abundantly, and appliances maintain good efficiency. Annual descaling is sufficient. The PFAS level of 4.0 ppt warrants a certified drinking water filter — the Monterey County agricultural sector (PFAS from agricultural chemicals in the Salinas Valley), Fort Ord (Monterey County — former US Army AFFF site, significant PFAS legacy in the Salinas Valley aquifer), and the central California coast PFAS background contribute to Prunedale's readings.
Geology & Source: Prunedale in Monterey County draws from the Prunedale Mutual Water Company on local wells (Salinas Valley, Monterey County) — the Salinas Valley aquifer is developed in Quaternary alluvial fill and the Cretaceous Aromas Red Sands (insoluble) over the Jurassic Franciscan Complex — California Monterey County Salinas Valley alluvial-Franciscan mixed watershed produces soft water at 67 mg/L with TDS 153.2 mg/L in this Monterey County California community.