Chinatown Water Hardness & Quality Report (2026)
Water Hardness
5.4 grains per gallon
Source
mixed
pH Level
7.6
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
230.9 mg/L
Est. Daily Cost
$0.25
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 Chinatown, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Chinatown | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.5 yrs | 8.5 yrs | -24% |
| Washing Machine | 10.2 yrs | 12 yrs | -15% |
| Water Heater | 11.9 yrs | 15 yrs | -21% |
Regional Water Comparison
How Chinatown compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Chinatown, California | 93 mg/L | 4.7 ppt | 🟡 Moderately Hard | mixed |
| San Francisco, California | 58 mg/L | 7.1 ppt | 🟢 Soft | mixed |
| Mission District, California | 158.5 mg/L | 6.6 ppt | 🟠 Hard | mixed |
| Noe Valley, California | 186 mg/L | 7.4 ppt | 🔴 Very Hard | mixed |
| Bayview-Hunters Point, California | 80.5 mg/L | 4.4 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Chinatown compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Chinatown | 93 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Chinatown's Water Unique?
Local geology and source profile
Chinatown, a historic neighborhood in central Los Angeles, receives its water from the Los Angeles Department of Water and Power (LADWP) — the same regional supply serving all of Los Angeles. LADWP draws from three sources: the Los Angeles Aqueduct (Owens Valley and Mono Basin Sierra Nevada snowmelt); State Water Project (SWP) imports; and San Fernando Valley Groundwater Basin wells. The Chinatown neighborhood is in the central Los Angeles distribution zone, served by the LADWP inner-city distribution network. Water hardness measures 93 mg/L — classified as moderately soft, reflecting the aqueduct-dominant inner city blend.
Chinatown's moderately soft supply reflects the central Los Angeles LADWP distribution zone's higher proportion of Owens Valley aqueduct water — one of the softest large-volume water supplies in the United States. The Los Angeles Aqueduct carries Owens Valley and Mono Basin snowmelt from the Sierra Nevada batholith and White-Inyo Mountains terrain — crystalline, calcium-poor rocks that contribute minimal dissolved calcium to runoff. The SWP component (Feather River water) adds moderately soft Sacramento Valley water. The central Los Angeles distribution zone draws less groundwater fraction than outer valley zones, keeping finished hardness at the moderately soft 93 mg/L range.
With hardness at 93 mg/L, Chinatown residents experience light to moderate scale accumulation. Faucet aerators and showerheads develop deposits slowly — bi-monthly cleaning with citric acid solution is sufficient. Dishwashers produce clean glassware. LADWP consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from Los Angeles Department of Water and Power (LADWP) central city blend — Owens Valley aqueduct Sierra Nevada snowmelt, State Water Project imports, and San Fernando Valley Groundwater Basin — the downtown Los Angeles Chinatown neighborhood distribution zone receives the LADWP inner city blend; moderately soft supply at 93 mg/L at the central Los Angeles distribution point.