Spring Valley Water Hardness & Quality Report (2026)
Water Hardness
5.3 grains per gallon
Source
mixed
pH Level
7.6
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
221.8 mg/L
Est. Daily Cost
$0.24
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 Spring Valley, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Spring Valley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.6 yrs | 8.5 yrs | -22% |
| Washing Machine | 10.2 yrs | 12 yrs | -15% |
| Water Heater | 11.9 yrs | 15 yrs | -21% |
Regional Water Comparison
How Spring Valley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Spring Valley, California | 91.5 mg/L | 4.5 ppt | 🟡 Moderately Hard | mixed |
| Lemon Grove, California | 165.5 mg/L | 6.7 ppt | 🟠 Hard | mixed |
| La Mesa, California | 44 mg/L | 3.1 ppt | 🟢 Soft | mixed |
| Casa de Oro-Mount Helix, California | 77.5 mg/L | 4.1 ppt | 🟡 Moderately Hard | mixed |
| La Presa, California | 48.5 mg/L | 3.2 ppt | 🟢 Soft | mixed |
National Benchmark
How Spring Valley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Spring Valley | 91.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Spring Valley's Water Unique?
Local geology and source profile
Spring Valley, California, in San Diego County — a major east San Diego County suburban community (Spring Valley is a significant San Diego County unincorporated community — an east San Diego County suburb adjacent to El Cajon and La Mesa; Spring Valley is one of the most racially and ethnically diverse communities in San Diego County, with a significant African-American, Filipino-American, Latino-American, Somali-American, and diverse international population; Spring Valley has been one of the areas of San Diego County with the most significant refugee and immigrant resettlement), home of a significant East African (Somali, Eritrean, Ethiopian) community in the San Diego metro area (Spring Valley has one of the most significant Somali-American communities in California), a diverse San Diego County community with a primarily working-class population, adjacent to Lemon Grove and El Cajon in the east San Diego County corridor, and a community shaped by its diverse demographic character — draws its municipal water supply via the Otay Water District. Water hardness in Spring Valley measures 91.5 mg/L — classified as moderately soft.
Spring Valley's moderate softness reflects the east San Diego County blended Colorado River–local reservoir supply with effective treatment. The Otay Water District distributes a blended supply to the east San Diego County Spring Valley zone with effective treatment, producing the moderately soft 91.5 mg/L.
With hardness at 91.5 mg/L, Spring Valley residents enjoy moderately soft water. Otay Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.
Geology & Source: Blended supply from the Colorado River and local reservoirs via the Otay Water District — the San Diego County east Spring Valley corridor (Precambrian calcareous-poor Peninsular Range granite and Colorado River calcareous-moderate alluvium — the calcareous-moderate east San Diego County blended supply; effective treatment); moderately soft at 91.5 mg/L in San Diego County.