La Puente Water Hardness & Quality Report (2026)
Water Hardness
2.8 grains per gallon
Source
mixed
pH Level
7.3
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
101.4 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 La Puente, your appliances are currently losing 6% efficiency due to mineral buildup.
| Appliance | In La Puente | 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 La Puente compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ La Puente, California | 48 mg/L | 3.3 ppt | 🟢 Soft | mixed |
| Valinda, California | 46.5 mg/L | 3.2 ppt | 🟢 Soft | mixed |
| Hacienda Heights, California | 116.5 mg/L | 5.3 ppt | 🟡 Moderately Hard | mixed |
| West Puente Valley, California | 64.5 mg/L | 3.7 ppt | 🟡 Moderately Hard | mixed |
| Avocado Heights, California | 48.5 mg/L | 3.3 ppt | 🟢 Soft | mixed |
National Benchmark
How La Puente compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ La Puente | 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 La Puente's Water Unique?
Local geology and source profile
La Puente, California, in Los Angeles County in the east San Gabriel Valley — a predominantly Latino-American working-class community in the eastern San Gabriel Valley, a major Mexican-American and Central American community adjacent to Industry, Rowland Heights, and West Covina, and a dense east Los Angeles County residential community — draws its municipal water supply from the Main San Gabriel Basin and MWD supply via the La Puente Valley County Water District. Water hardness in La Puente measures 48 mg/L — classified as very soft.
La Puente's very soft supply — exceptionally soft for an east San Gabriel Valley community — reflects the La Puente Valley County Water District's effective treatment of the MWD and basin blend. The Main San Gabriel Basin groundwater is typically harder (150–200 mg/L) at this depth due to the calcareous San Gabriel Mountains alluvial fan deposits. The La Puente Valley County Water District applies advanced treatment including softening, substantially reducing hardness. The combination of local basin water treatment and MWD State Water Project soft blend produces the exceptional 48 mg/L at La Puente.
With hardness at 48 mg/L, La Puente residents enjoy very soft water — unusually soft for the San Gabriel Valley. La Puente Valley County Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the San Gabriel Valley Groundwater Basin (Main San Gabriel Basin) and Metropolitan Water District (MWD) supply via the La Puente Valley County Water District — the Los Angeles County east San Gabriel Valley (Quaternary alluvial fan deposits from San Gabriel Mountains; effective basin treatment reducing MWD Colorado River hardness); very soft supply at 48 mg/L in Los Angeles County.