Alameda Water Hardness & Quality Report (2026)
Water Hardness
2.3 grains per gallon
Source
mixed
pH Level
7.2
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
82.7 mg/L
Est. Daily Cost
$0.11
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 Alameda, your appliances are currently losing 5% efficiency due to mineral buildup.
| Appliance | In Alameda | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.3 yrs | 8.5 yrs | -2% |
| Washing Machine | 12.1 yrs | 12 yrs | — |
| Water Heater | 14 yrs | 15 yrs | -7% |
Regional Water Comparison
How Alameda compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Alameda, California | 39.5 mg/L | 3.2 ppt | 🟢 Soft | mixed |
| Oakland, California | 142.5 mg/L | 6.2 ppt | 🟠 Hard | mixed |
| Berkeley, California | 190.5 mg/L | 7.6 ppt | 🔴 Very Hard | mixed |
| San Leandro, California | 30.5 mg/L | 2.9 ppt | 🟢 Soft | mixed |
| Albany, California | 47 mg/L | 3.4 ppt | 🟢 Soft | mixed |
National Benchmark
How Alameda compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Alameda | 39.5 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Alameda's Water Unique?
Local geology and source profile
Alameda, California — a Bay Area island city in Alameda County in San Francisco Bay (Naval Air Station Alameda's former home) — draws its municipal water supply from the East Bay Municipal Utility District (EBMUD), receiving treated Mokelumne River water via the EBMUD Mokelumne Aqueduct distributed through the East Bay regional system and the City of Alameda Water Division local distribution network. The Mokelumne River originates in the Sierra Nevada south of Lake Tahoe. Water hardness in Alameda measures 39.5 mg/L — classified as very soft.
Alameda's very soft supply reflects EBMUD's Mokelumne River source water's Sierra Nevada origin. The Mokelumne River watershed above Pardee Reservoir and Camanche Reservoir (Amador and Calaveras Counties) drains the Sierra Nevada batholith — Cretaceous granodiorite and tonalite (Amador Group, Mariposa Formation metamorphic roof pendants, and the Mother Lode belt Jurassic serpentinite). The granitic and metamorphic terrain of the Mokelumne watershed is essentially calcium-free — producing one of the softest major municipal water supplies in California. EBMUD treats and distributes this very soft Sierra Nevada water throughout the East Bay, including Alameda, maintaining the inherently low hardness of the Mokelumne source.
With hardness at 39.5 mg/L, Alameda residents enjoy very soft water with essentially zero scale challenges. Soap and shampoo lather generously. EBMUD consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from East Bay Municipal Utility District (EBMUD) — Mokelumne River aqueduct (Sierra Nevada source) and local Pardee and Camanche Reservoirs — serving the City of Alameda Water Division — the Sierra Nevada granodiorite and Eocene Valley Spring Gravels of the Mokelumne watershed; extremely soft supply at 39.5 mg/L in Alameda County on San Francisco Bay.