Muscoy Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
mixed
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
418.1 mg/L
Est. Daily Cost
$0.40
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 Muscoy, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Muscoy | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Muscoy compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Muscoy, California | ≈ 120–179 mg/L | 6.1 ppt | 🟠 Hard | mixed |
| Rialto, California | 160 mg/L | 0 ppt | 🟠 Hard | reservoir |
| San Bernardino, California | ≈ 120–179 mg/L | 45.3 ppt | 🟠 Hard | groundwater |
| Colton, California | ≈ 180+ mg/L | 118.3 ppt | 🔴 Very Hard | groundwater |
| Bloomington, California | ≈ 120–179 mg/L | 6 ppt | 🟠 Hard | groundwater |
National Benchmark
How Muscoy compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Muscoy | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Muscoy's Water Unique?
Local geology and source profile
Muscoy, California, receives its water from a blend of imported surface water and local groundwater, managed by the San Bernardino Valley Municipal Water District and local agencies. The surface water originates from the Santa Ana River watershed and its reservoirs within the San Bernardino Mountains. Groundwater is drawn from wells tapping the Upper Santa Ana River Basin aquifer system. This mixed supply is then treated at regional plants, undergoing processes like coagulation, filtration, and disinfection, before being distributed to residents in Muscoy and nearby communities in San Bernardino County. The watershed feeding this supply includes the Santa Ana River and its tributaries, which flow into reservoirs and recharge basins.
The aquifer beneath Muscoy is composed of Quaternary alluvial deposits resting atop older Miocene sedimentary rocks, such as sandstones and shales. These older formations contain calcareous layers and carbonate minerals. As water percolates through these limestone-rich geological materials, it dissolves significant amounts of calcium and magnesium. This interaction is the primary reason the local water supply is characterized as hard, reflecting the mineral content of the underlying bedrock and alluvium.
Homeowners in Muscoy often notice scale buildup on fixtures like faucets and showerheads, and inside appliances such as water heaters. This mineral content can also reduce the efficiency of dishwashers and washing machines over time. Appliances that heat water, including coffee makers, are particularly susceptible to scale formation and may need more frequent cleaning. While regular cleaning of aerators and flushing water heaters can help, installing a whole-house water softener is frequently recommended to protect plumbing and extend the lifespan of these appliances. The water treatment process includes corrosion control to minimize pipe leaching, and while lead and copper levels are generally compliant, older homes may benefit from flushing taps before use.
Geology & Source: San Bernardino Basin; Quaternary alluvial deposits and Miocene sandstones/shales with calcareous layers produce hard water
Other California Water Reports
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Frequently Asked Questions
Is Muscoy's water safe to drink?
Do I need a water softener in Muscoy?
How does Muscoy compare to the USA average?
Data Sources & Methodology
Water quality data for Muscoy 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.