Manhattan Beach Water Hardness & Quality Report (2026)
Water Hardness
6 grains per gallon
Source
mixed
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
256.1 mg/L
Est. Daily Cost
$0.27
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 Manhattan Beach, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Manhattan Beach | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.2 yrs | 8.5 yrs | -27% |
| Washing Machine | 9.8 yrs | 12 yrs | -18% |
| Water Heater | 11.5 yrs | 15 yrs | -23% |
Regional Water Comparison
How Manhattan Beach compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Manhattan Beach, California | 102 mg/L | 4.8 ppt | 🟡 Moderately Hard | mixed |
| Hermosa Beach, California | 60 mg/L | 3.6 ppt | 🟡 Moderately Hard | mixed |
| El Segundo, California | 38 mg/L | 3 ppt | 🟢 Soft | mixed |
| Redondo Beach, California | 179.5 mg/L | 7.1 ppt | 🟠 Hard | mixed |
| Lawndale, California | 145.5 mg/L | 6.1 ppt | 🟠 Hard | mixed |
National Benchmark
How Manhattan Beach compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Manhattan Beach | 102 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Manhattan Beach's Water Unique?
Local geology and source profile
Manhattan Beach, California, in Los Angeles County — a premier south Bay coastal community (Manhattan Beach is one of the most desirable beachfront communities in Southern California — a wealthy, highly educated South Bay coastal community with pristine beaches, a walkable downtown, and consistently ranked among the best places to live in California), home of the Strand (the iconic beach path running through Manhattan Beach, Hermosa Beach, and Redondo Beach — a premier coastal recreation corridor), a diverse Los Angeles County community with significant tech and entertainment industry professional populations (many Google, SpaceX, and entertainment industry professionals live in Manhattan Beach), and a South Bay community with strong volleyball culture (Manhattan Beach hosts one of the most prestigious professional beach volleyball tournaments in the world) — draws its municipal water supply via the West Basin Municipal Water District. Water hardness in Manhattan Beach measures 102 mg/L — classified as moderately hard.
Manhattan Beach's moderate hardness reflects the West Basin MWD import blend's treated characteristics. The West Basin Municipal Water District treats and distributes MWD imported water (a blend of SWP Sierra Nevada supply — soft — and Colorado River supply — harder) to the south Bay communities including Manhattan Beach. The West Basin's advanced treatment (including recycled water injection to maintain the seawater intrusion barrier in the coastal aquifer) produces the moderate 102 mg/L.
At 102 mg/L, Manhattan Beach residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. City of Manhattan Beach Water Division consistently delivers water meeting all California State Water Board and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the West Basin Municipal Water District (MWD import blend) via the City of Manhattan Beach Water Division — the Los Angeles County south Bay coastal zone (Quaternary calcareous-poor Los Angeles Basin coastal alluvium and MWD State Water Project/Colorado River blend; West Basin MWD south Bay distribution; effective seawater barrier operation); moderately hard supply at 102 mg/L in Los Angeles County.