Shadow Hills Water Hardness & Quality Report (2026)
Water Hardness
2 grains per gallon
Source
mixed
pH Level
7.2
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
67.4 mg/L
Est. Daily Cost
$0.09
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 Shadow Hills, your appliances are currently losing 4% efficiency due to mineral buildup.
| Appliance | In Shadow Hills | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.2 yrs | 8.5 yrs | -4% |
| Washing Machine | 11.5 yrs | 12 yrs | -4% |
| Water Heater | 14.4 yrs | 15 yrs | -4% |
Regional Water Comparison
How Shadow Hills compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Shadow Hills, California | 33.5 mg/L | 2.9 ppt | 🟢 Soft | mixed |
| Sunland, California | ≈ 120–179 mg/L | 2.9 ppt | 🟠 Hard | mixed |
| Tujunga, California | ≈ 120–179 mg/L | 5.1 ppt | 🟠 Hard | groundwater |
| San Fernando, California | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | groundwater |
| Burbank, California | ≈ 180+ mg/L | 73.4 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Shadow Hills compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Shadow Hills | 33.5 mg/L | 🟢 None |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Shadow Hills's Water Unique?
Local geology and source profile
Shadow Hills, California, in Los Angeles County — a Los Angeles County community adjacent to Sunland and Tujunga in the north Los Angeles foothills — receives its water from the Los Angeles Department of Water and Power, drawing from the Los Angeles Aqueduct or MWD blend (Los Angeles County) through the north Los Angeles distribution.
The very soft 33.5 mg/L hardness and very low TDS of 67.4 mg/L reflect the north LA County Aqueduct supply's very soft character — the Sierra Nevada snowmelt component delivers extremely soft, low-TDS water that dilutes the harder MWD Colorado River blend, producing very soft water in the north Los Angeles communities near the aqueduct terminus (compare Commerce CA: 90 mg/L on a softer MWD blend; Malibu CA: 90 mg/L). The LA Aqueduct-MWD blend at Los Angeles County — Jurassic Sierra Nevada granodiorite (insoluble — primary dilutant from Aqueduct), Permian Colorado Plateau calcareous (calcareous — MWD component), and local Quaternary groundwater (slightly calcareous — minor).
At 33.5 mg/L, Shadow Hills' water is very soft — scale forms very slowly in appliances, dishwashers remain efficient, and no softening is needed. Annual descaling is appropriate. The PFAS level of 2.9 ppt is relatively low — warrants routine monitoring but no urgent filtration.
Geology & Source: Shadow Hills in Los Angeles County draws from the DWP on the Los Angeles Aqueduct or MWD blend (Los Angeles County, north Los Angeles, California) — the LA Aqueduct delivers Sierra Nevada snowmelt (Jurassic granodiorite — insoluble) blended with MWD Colorado River supply (calcareous) — California Los Angeles County LA Aqueduct-MWD Sierra Nevada-Colorado blend produces very soft water at 33.5 mg/L with TDS 67.4 mg/L.
Other California Water Reports
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Frequently Asked Questions
Is Shadow Hills's water safe to drink?
Do I need a water softener in Shadow Hills?
How does Shadow Hills compare to the USA average?
Data Sources & Methodology
Water quality data for Shadow Hills 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.