Stevenson Ranch Water Hardness & Quality Report (2026)
Water Hardness
180+ mg/L
Very Hardestimated · not lab-verified
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
$0.91
energy & soap waste
Source: See methodology section below · 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 45% efficiency due to mineral buildup.
| Appliance | In Stevenson Ranch | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Stevenson Ranch compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Stevenson Ranch, California | ≈ 180+ mg/L | 4.1 ppt | 🔴 Very Hard | mixed |
| Santa Clarita, California | ≈ 180+ mg/L | 4.4 ppt | 🔴 Very Hard | reservoir |
| Valencia, California | 570 mg/L | 3.1 ppt | 🔴 Very Hard | groundwater |
| Canyon Country, California | ≈ 120–179 mg/L | 4.8 ppt | 🟠 Hard | groundwater |
| Castaic, California | ≈ 180+ mg/L | 24.6 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Stevenson Ranch compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Stevenson Ranch | ≈ 180+ mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Stevenson Ranch's Water Unique?
Local geology and source profile
Stevenson Ranch, located in Los Angeles County, California, is served by Santa Clarita Valley Water, which supplies the community with water drawn from a mix of local groundwater sources from the Santa Clarita basin and supplemental surface water. The utility manages water quality across the Santa Clarita Valley service area, encompassing multiple communities in northern Los Angeles County. Water treatment and distribution infrastructure serves residential, commercial, and industrial customers throughout the region, with water quality data published in annual Consumer Confidence Reports.
The Santa Clarita Valley watershed is underlain by Quaternary alluvial deposits and older Tertiary sedimentary formations containing naturally occurring calcium and magnesium minerals. These geological formations, typical of Southern California's complex hydrogeological setting, contribute dissolved minerals to the groundwater supply. The combination of local groundwater and surface water blending results in a hard water supply characteristic of the region's mineral-rich Santa Clarita aquifer systems and geological composition.
Stevenson Ranch residents experience very hard water, creating visible aesthetic impacts including mineral scale deposits on fixtures, faucets, and glassware, as well as white spotting on porcelain and glass surfaces. Water heaters, dishwashers, and washing machines are significantly affected by mineral buildup, reducing efficiency and lifespan. Installing a water softener is typically recommended to protect plumbing, reduce maintenance, and improve appliance performance and cleaning effectiveness. Santa Clarita Valley Water emphasizes that hardness results from naturally occurring calcium and magnesium and does not pose health risks; mineral deposits accumulate over time, necessitating periodic maintenance.
Geology & Source: Santa Clarita groundwater basin; Quaternary alluvial deposits and Tertiary sedimentary formations — calcium and magnesium-rich minerals typical of Southern California hydrogeology produce naturally hard water
Other California Water Reports
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Frequently Asked Questions
Is Stevenson Ranch's water safe to drink?
Do I need a water softener in Stevenson Ranch?
How does Stevenson Ranch compare to the USA average?
Data Sources & Methodology
Water quality data for Stevenson Ranch is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.