West Covina Water Hardness & Quality Report (2026)
Water Hardness
2.8 grains per gallon
Source
mixed
pH Level
7.3
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
101.5 mg/L
Est. Daily Cost
$0.13
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 West Covina, your appliances are currently losing 6% efficiency due to mineral buildup.
| Appliance | In West Covina | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8 yrs | 8.5 yrs | -6% |
| Washing Machine | 11.8 yrs | 12 yrs | -2% |
| Water Heater | 13.7 yrs | 15 yrs | -9% |
Regional Water Comparison
How West Covina compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ West Covina, California | 48 mg/L | 3.3 ppt | 🟢 Soft | mixed |
| Valinda, California | 46.5 mg/L | 3.2 ppt | 🟢 Soft | mixed |
| Baldwin Park, California | 80 mg/L | 4.2 ppt | 🟡 Moderately Hard | mixed |
| Vincent, California | 167.5 mg/L | 6.8 ppt | 🟠 Hard | mixed |
| West Puente Valley, California | 64.5 mg/L | 3.7 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How West Covina compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ West Covina | 48 mg/L | 🟢 None |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes West Covina's Water Unique?
Local geology and source profile
West Covina, California, in the western San Gabriel Valley of Los Angeles County, receives its municipal water supply through the Valley County Water District (VCWD) and the San Gabriel Valley Municipal Water District (SGVMWD), sourcing from the Main San Gabriel Basin groundwater via local wells and imported water from SGVMWD. The Main San Gabriel Basin is recharged primarily through the San Gabriel River spreading grounds at the Baldwin Park Key Well area — operated by the San Gabriel Basin Watermaster — where treated surface water and Metropolitan Water District (MWD) imports are percolated into the aquifer. Water hardness in West Covina measures 48 mg/L — classified as soft.
West Covina's very soft supply reflects the managed recharge character of the western San Gabriel Basin's water in this distribution zone. San Gabriel River water arriving at the Whittier Narrows and San Gabriel Canyon spreading grounds originates from the San Gabriel Mountains — draining Precambrian San Gabriel anorthosite, Mesozoic granodiorite, and Cretaceous Pelona Schist (metamorphic terrain largely depleted of soluble calcium). The MWD import component — State Water Project Sierra Nevada and Colorado River water blended and treated — adds moderate minerals, but the SGVMWD distribution zone here draws predominantly from the San Gabriel River alluvial fan recharge, keeping hardness very low. San Gabriel Basin Watermaster managed recharge operations ensure consistent, high-quality supply throughout the western San Gabriel Valley.
With hardness at 48 mg/L, West Covina residents enjoy very soft water with essentially no scale challenges. Soap lathers exceptionally well. Faucet aerators and showerheads rarely need descaling. Dishwashers produce clean glassware. Valley County Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from Main San Gabriel Basin groundwater via the Valley County Water District and San Gabriel Valley Municipal Water District (SGVMWD) imports — the Main San Gabriel Basin alluvial aquifer is recharged by San Gabriel River Sierra Nevada snowmelt; the San Gabriel Mountains Precambrian–Mesozoic granodiorite recharge source with short alluvial residence time in the western San Gabriel Valley produces very soft supply at 48 mg/L.