Stevenson Ranch Water Hardness & Quality Report (2026)
Water Hardness
4.4 grains per gallon
Source
mixed
pH Level
7.5
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
173.7 mg/L
Est. Daily Cost
$0.20
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 Stevenson Ranch, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Stevenson Ranch | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.1 yrs | 8.5 yrs | -16% |
| Washing Machine | 10.8 yrs | 12 yrs | -10% |
| Water Heater | 12.6 yrs | 15 yrs | -16% |
Regional Water Comparison
How Stevenson Ranch compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Stevenson Ranch, California | 75 mg/L | 4.1 ppt | 🟡 Moderately Hard | mixed |
| Santa Clarita, California | 85.5 mg/L | 4.4 ppt | 🟡 Moderately Hard | mixed |
| Valencia, California | 43 mg/L | 3.1 ppt | 🟢 Soft | mixed |
| Canyon Country, California | 101 mg/L | 4.8 ppt | 🟡 Moderately Hard | mixed |
| Castaic, California | 155 mg/L | 6.4 ppt | 🟠 Hard | mixed |
National Benchmark
How Stevenson Ranch compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Stevenson Ranch | 75 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Stevenson Ranch's Water Unique?
Local geology and source profile
Stevenson Ranch, California, in Los Angeles County — an unincorporated Los Angeles County community adjacent to Valencia and Castaic in the Santa Clarita Valley — receives its municipal water from the Santa Clarita Valley Water Agency (SCVWA), drawing from the State Water Project (SWP) (northern California Sierra Nevada snowmelt) and supplemented by local groundwater wells.
The soft 75 mg/L hardness and TDS of 173.7 mg/L reflect the Santa Clarita Valley's blended SWP-local supply. The State Water Project delivers northern California water — primarily Sierra Nevada snowmelt from the Sacramento River and San Joaquin Delta watersheds, which drain insoluble Cretaceous Sierra Nevada granodiorite. The SWP water is inherently very soft; blending with local Santa Clara River alluvial aquifer groundwater raises the hardness moderately.
At 75 mg/L, Stevenson Ranch's water is soft — essentially no scale forms, soap lathers abundantly, and appliances maintain good efficiency. Annual descaling is sufficient. The PFAS level of 4.1 ppt warrants a certified drinking water filter — the Los Angeles County Santa Clarita industrial corridor, Edwards Air Force Base (AFFF in the Antelope Valley-Santa Clarita watershed), and the southern California PFAS background contribute to Stevenson Ranch's readings.
Geology & Source: Stevenson Ranch in Los Angeles County draws from the Santa Clarita Valley Water Agency on the State Water Project (Los Angeles County) — the SWP delivers water from the Sacramento-San Joaquin Delta (Sierra Nevada snowmelt, insoluble granitic) blended with local groundwater — California Los Angeles County SWP-local mixed supply produces soft water at 75 mg/L with TDS 173.7 mg/L in this Los Angeles County California community.