Folsom Water Hardness & Quality Report (2026)
Water Hardness
1.5 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
304.3 mg/L
Est. Daily Cost
$0.07
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 Folsom, your appliances are currently losing 3% efficiency due to mineral buildup.
| Appliance | In Folsom | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 8.8 yrs | 8.5 yrs | — |
| Washing Machine | 12.7 yrs | 12 yrs | — |
| Water Heater | 14.6 yrs | 15 yrs | -3% |
Regional Water Comparison
How Folsom compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Folsom, California | 25 mg/L | 0 ppt | 🟢 Soft | reservoir |
| Orangevale, California | ≈ 180+ mg/L | 0 ppt | 🔴 Very Hard | reservoir |
| Granite Bay, California | ≈ 0–60 mg/L | 0 ppt | 🟢 Soft | reservoir |
| El Dorado Hills, California | ≈ 120–179 mg/L | 7.5 ppt | 🟠 Hard | groundwater |
| Fair Oaks, California | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | reservoir |
National Benchmark
How Folsom compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Folsom | 25 mg/L | 🟢 None |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Folsom's Water Unique?
Local geology and source profile
The City of Folsom operates a municipal water utility serving approximately 80,000 residents in Sacramento County, California. The primary water source is Folsom Lake Reservoir, fed by water purchased through the Placer County Water Agency and the City of Roseville. The Water Treatment Division manages treatment and maintains 372 miles of distribution infrastructure. The utility publishes an annual Consumer Confidence Report (CCR) detailing water quality parameters and treatment processes; residents may contact the Water Quality Division at 916-461-6177 or visit www.folsom.ca.us/ccr.
Folsom's water originates in the Sierra Nevada foothills, where snowmelt and rainfall percolate through granite bedrock formations containing calcium and magnesium minerals. As water travels through underground fractures and over exposed rock surfaces before reaching Folsom Lake Reservoir, it becomes naturally mineralized. The watershed is characterized by granitic geology typical of the Sierra Nevada range, which limits mineral uptake and yields a soft water supply at approximately 25 mg/L as calcium carbonate.
Soft water at 25 mg/L means scale buildup in appliances and pipes is minimal. Residents typically experience little soap scum, few mineral deposits on fixtures, and reliable appliance performance without the complications of hard water. Water softening is generally unnecessary. Maintenance of water heaters and dishwashers is straightforward. The City of Folsom confirms all drinking water meets EPA and State primary and secondary drinking water standards; the annual CCR reports total hardness as calcium carbonate.
Geology & Source: Folsom Lake Reservoir fed by Sierra Nevada snowmelt; granite bedrock in Sierra Nevada foothills — limited mineral dissolution produces soft water at 25 mg/L
Other California Water Reports
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Frequently Asked Questions
Is Folsom's water safe to drink?
Do I need a water softener in Folsom?
How does Folsom compare to the USA average?
Data Sources & Methodology
Water quality data for Folsom 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.