Bostonia Water Hardness & Quality Report (2026)
Water Hardness
11.2 grains per gallon
Source
mixed
pH Level
8.3
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
601.3 mg/L
Est. Daily Cost
$0.51
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 Bostonia, your appliances are currently losing 25% efficiency due to mineral buildup.
| Appliance | In Bostonia | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 3.3 yrs | 8.5 yrs | -61% |
| Washing Machine | 6.5 yrs | 12 yrs | -46% |
| Water Heater | 8 yrs | 15 yrs | -47% |
Regional Water Comparison
How Bostonia compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Bostonia, California | 191 mg/L | 7.4 ppt | 🔴 Very Hard | mixed |
| Winter Gardens, California | 189 mg/L | 7.3 ppt | 🔴 Very Hard | mixed |
| El Cajon, California | 183.5 mg/L | 7.2 ppt | 🔴 Very Hard | mixed |
| Santee, California | 111.5 mg/L | 5.1 ppt | 🟡 Moderately Hard | mixed |
| Lakeside, California | 94.5 mg/L | 4.6 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Bostonia compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Bostonia | 191 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Bostonia's Water Unique?
Local geology and source profile
Bostonia, California, in San Diego County — an unincorporated San Diego County community adjacent to El Cajon and Santee in the east San Diego metro — receives its water from the Helix Water District, drawing from El Capitan Reservoir (San Diego River, east San Diego County) and Colorado River imports (via MWD and SDCWA) through the east San Diego distribution.
The hard 191 mg/L hardness and elevated TDS of 601.3 mg/L (significantly elevated TDS relative to hardness — reflecting the Colorado River's high dissolved sulfate and chloride) reflect the east San Diego Helix District's Colorado River-dominant blended supply character. El Capitan Reservoir (Peninsular Ranges — Cretaceous granodiorite, insoluble — very soft local supply) is blended with hard Colorado River MWD/SDCWA imports (Permian and Triassic evaporitic Colorado Plateau dissolution — high TDS), producing the hard Bostonia supply at this blend ratio.
At 191 mg/L with TDS 601, Bostonia's water is hard — scale builds steadily in kettles and appliances, dishwashers benefit from rinse aid, and water heaters should be descaled annually. Monthly descaling is recommended. The PFAS level of 7.4 ppt warrants a certified reverse osmosis drinking water filter — the San Diego County east El Cajon industrial corridor, Marine Corps Air Station Miramar (AFFF — a primary San Diego County PFAS source), and the Colorado River PFAS background contribute to Bostonia's elevated readings.
Geology & Source: Bostonia in San Diego County draws from the Helix Water District on El Capitan Reservoir and Colorado River MWD imports (San Diego County, east San Diego metro) — El Capitan drains the Peninsular Ranges (Cretaceous Woodson Mountain Granodiorite — insoluble) blended with hard Colorado River water — California San Diego County Helix mixed supply produces hard water at 191 mg/L with TDS 601.3 mg/L.