Placerville Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
reservoir
pH Level
7.9
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
376.5 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 Placerville, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In Placerville | 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 Placerville compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Placerville, California | ≈ 120–179 mg/L | 3.2 ppt | 🟠 Hard | reservoir |
| Diamond Springs, California | ≈ 120–179 mg/L | 7.3 ppt | 🟠 Hard | mixed |
| Cameron Park, California | ≈ 120–179 mg/L | 3.6 ppt | 🟠 Hard | mixed |
| El Dorado Hills, California | ≈ 120–179 mg/L | 7.5 ppt | 🟠 Hard | groundwater |
| Auburn, California | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
National Benchmark
How Placerville compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Placerville | ≈ 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 Placerville's Water Unique?
Local geology and source profile
City of Placerville – Main draws its drinking water from surface sources within the Sierra Nevada mountains. This water travels through local reservoirs before reaching customers in El Dorado County. The treatment process involves conventional filtration and pre-oxidation with chlorine, followed by disinfection using hypochlorite. These steps are taken to ensure the water meets federal and state safety standards for public consumption.
The watershed feeding Placerville’s supply is situated in the Sierra Nevada foothills. Here, streams and reservoirs gather snowmelt and rainfall that has percolated through granitic and metamorphic bedrock dating back to the Mesozoic era. The slow weathering of these crystalline rocks releases only modest amounts of calcium and magnesium. This geological characteristic results in a moderately mineralized and moderately hard water supply, lacking the high mineral content often found in groundwater from limestone-rich areas.
With its moderate hardness, Placerville’s water may lead to light to moderate scale buildup on fixtures, showerheads, and heating elements over time. Appliances like water heaters, dishwashers, and coffee makers can be affected. To maintain appliance efficiency and prolong their lifespan, regular descaling with vinegar or citric-acid-based cleaners is advisable. While a water softener isn't strictly necessary for health, it might be beneficial for households experiencing frequent limescale issues or desiring enhanced protection for their appliances and plumbing.
Geology & Source: Sierra Nevada granite and metamorphic rocks; slow weathering of crystalline rocks yields moderate hardness
Other California Water Reports
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Frequently Asked Questions
Is Placerville's water safe to drink?
Do I need a water softener in Placerville?
How does Placerville compare to the USA average?
Data Sources & Methodology
Water quality data for Placerville 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.