Loma Linda Water Hardness & Quality Report (2026)
Water Hardness
6.7 grains per gallon
Source
mixed
pH Level
7.8
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
300.5 mg/L
Est. Daily Cost
$0.31
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 Loma Linda, your appliances are currently losing 15% efficiency due to mineral buildup.
| Appliance | In Loma Linda | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.8 yrs | 8.5 yrs | -32% |
| Washing Machine | 9.3 yrs | 12 yrs | -22% |
| Water Heater | 11 yrs | 15 yrs | -27% |
Regional Water Comparison
How Loma Linda compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Loma Linda, California | 115.5 mg/L | 5.2 ppt | 🟡 Moderately Hard | mixed |
| Grand Terrace, California | 196.5 mg/L | 7.6 ppt | 🔴 Very Hard | mixed |
| Colton, California | 82 mg/L | 4.2 ppt | 🟡 Moderately Hard | mixed |
| San Bernardino, California | 166 mg/L | 6.7 ppt | 🟠 Hard | mixed |
| Redlands, California | 179 mg/L | 7.1 ppt | 🟠 Hard | mixed |
National Benchmark
How Loma Linda compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Loma Linda | 115.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Loma Linda's Water Unique?
Local geology and source profile
Loma Linda, California, in San Bernardino County in the Inland Valley east of Los Angeles — home to Loma Linda University Health and one of the world's celebrated Blue Zones where residents live significantly longer than average — receives its municipal water from the City of Loma Linda Water Division and Inland Empire Utilities Agency (IEUA), drawing from the San Bernardino Valley Municipal Water District system that blends State Water Project (SWP) imported water through the California Aqueduct with local San Bernardino Basin groundwater managed through spreading ground recharge operations.
The moderately soft 115.5 mg/L hardness and TDS of 300.5 mg/L reflect the balanced blending of Loma Linda's water supply. State Water Project water from the Sacramento-San Joaquin Delta is naturally soft (~90–120 mg/L) from its mixed Sierra Nevada crystalline watershed origin. The San Bernardino Basin local groundwater — recharged through alluvial spreading grounds along the Santa Ana River corridor — contacts Quaternary alluvial fan sediments derived from the granodioritic San Bernardino and San Gabriel Mountains, producing moderately soft to moderate hardness water. IEUA and SBVMWD blend these sources into a consistent, moderate supply for the Inland Valley.
At 115.5 mg/L, Loma Linda's water is moderately soft — comfortable for everyday use and consistent with the community's health-focused culture. Scale forms gradually in kettles and appliances over months, soap lathers well, and the dishwasher produces clean results. Quarterly descaling of heating appliances is appropriate. The PFAS level of 5.2 ppt is favorable for the Inland Empire — the San Bernardino Valley's water management through IEUA includes significant treatment investment, and the SWP import dilution keeps PFAS levels below regional averages in many served communities.
Geology & Source: Loma Linda in San Bernardino County draws from San Bernardino Valley Municipal Water District, blending State Water Project imported supply with San Bernardino Basin groundwater — the valley aquifer contacts Quaternary alluvial fan deposits from granitic San Bernardino Mountain terrain — SWP import and local alluvial groundwater blending produces moderately soft water at 115.5 mg/L.