Greenfield Water Hardness & Quality Report (2026)
Water Hardness
4.1 grains per gallon
Source
mixed
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
164.1 mg/L
Est. Daily Cost
$0.19
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 Greenfield, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Greenfield | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.3 yrs | 8.5 yrs | -14% |
| Washing Machine | 11 yrs | 12 yrs | -8% |
| Water Heater | 12.8 yrs | 15 yrs | -15% |
Regional Water Comparison
How Greenfield compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Greenfield, California | 71 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| Soledad, California | 170.5 mg/L | 7 ppt | 🟠 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 Greenfield compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Greenfield | 71 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Greenfield's Water Unique?
Local geology and source profile
Greenfield, California, in Monterey County — a Monterey County city adjacent to Soledad and King City in the south Salinas Valley — receives its municipal water from the City of Greenfield Water Division, drawing from local groundwater wells in the south Salinas Valley alluvial aquifer (Monterey County).
The soft 71 mg/L hardness and TDS of 164.1 mg/L are consistent with the Salinas Valley alluvial aquifer's mixed geology (similar to Prunedale: 67 mg/L). The south Salinas Valley aquifer draws from Quaternary alluvial fill from the Santa Lucia Range (Jurassic Franciscan Complex — insoluble mafic melange), the Cretaceous Panoche Formation (insoluble), and minor Paleocene Nacimiento Formation calcareous units. The predominantly insoluble Franciscan source rocks produce the soft Salinas Valley supply.
At 71 mg/L, Greenfield'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 — Fort Ord (Monterey County — former US Army base with significant PFAS in the Salinas Valley watershed), the Monterey County agricultural sector (Salinas Valley pesticide-PFAS co-loading), and the central California coast PFAS background contribute to Greenfield's readings.
Geology & Source: Greenfield in Monterey County draws from the City of Greenfield water on the Salinas Valley aquifer (Monterey County, California) — the aquifer is developed in Quaternary alluvium over Jurassic Franciscan Complex (insoluble) — California Monterey County Salinas Valley alluvial-Franciscan supply produces soft water at 71 mg/L with TDS 164.1 mg/L in this Monterey County city.