Morgan Hill 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
154.5 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 Morgan Hill, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Morgan Hill | 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 Morgan Hill compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Morgan Hill, California | 67.5 mg/L | 4 ppt | 🟡 Moderately Hard | mixed |
| Gilroy, California | 110.5 mg/L | 5.2 ppt | 🟡 Moderately Hard | mixed |
| Watsonville, California | 182 mg/L | 7.3 ppt | 🔴 Very Hard | mixed |
| Alum Rock, California | 93 mg/L | 4.7 ppt | 🟡 Moderately Hard | mixed |
| San Jose, California | 189.5 mg/L | 7.5 ppt | 🔴 Very Hard | mixed |
National Benchmark
How Morgan Hill compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Morgan Hill | 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 Morgan Hill's Water Unique?
Local geology and source profile
Morgan Hill, California, in Santa Clara County in the south Santa Clara Valley — a rapidly growing south Silicon Valley agricultural and residential community known for wine country (Kirigin Cellars, Guglielmo Winery) and mushroom growing (Morgan Hill was the 'Mushroom Capital of the World'), a diverse Santa Clara County community with significant Mexican-American agricultural community heritage, and a major tech industry suburb south of San Jose — draws its municipal water supply from Anderson Reservoir and the Coyote Valley Basin via the City of Morgan Hill Water Division. Water hardness in Morgan Hill measures 67.5 mg/L — classified as moderately soft.
Morgan Hill's moderate softness reflects the south Santa Clara Valley's mixed geology and SCVWD treatment. Anderson Reservoir (south of Morgan Hill on Coyote Creek — the Santa Cruz Mountains and Diablo Range watershed, Cretaceous Franciscan Complex — calcareous-poor coastal California terrain). The SCVWD percolation and treatment system substantially softens supplies before distribution. Morgan Hill's relatively new south Santa Clara Valley distribution infrastructure (major suburban buildout in the 1990s–2010s) minimizes additional mineral pickup, producing the moderate 67.5 mg/L.
With hardness at 67.5 mg/L, Morgan Hill residents enjoy soft water for a California community. City of Morgan Hill Water Division consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from the Santa Clara Valley Water District (SCVWD) Anderson Reservoir and Coyote Valley groundwater basin via the City of Morgan Hill Water Division — the Santa Clara County south Santa Clara Valley (Quaternary alluvial fan and Coyote Creek corridor, Cretaceous Franciscan Complex calcareous-poor terrain, effective SCVWD treatment); moderately soft supply at 67.5 mg/L in Santa Clara County.