San Carlos Park Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.2
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
399 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 San Carlos Park, your appliances are currently losing 20% efficiency due to mineral buildup.
| Appliance | In San Carlos Park | 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 San Carlos Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ San Carlos Park, Florida | ≈ 120–179 mg/L | 4.9 ppt | 🟠 Hard | groundwater |
| Estero, Florida | ≈ 120–179 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
| Villas, Florida | ≈ 120–179 mg/L | 4.9 ppt | 🟠 Hard | groundwater |
| Cypress Lake, Florida | ≈ 120–179 mg/L | 9.7 ppt | 🟠 Hard | groundwater |
| Bonita Springs, Florida | ≈ 120–179 mg/L | 0 ppt | 🟠 Hard | groundwater |
National Benchmark
How San Carlos Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ San Carlos Park | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
Bring Scarsdale-quality water to your San Carlos Park home
Shop water softeners on Amazon.com →
What Makes San Carlos Park's Water Unique?
Local geology and source profile
Lee County Utilities (LCU) serves San Carlos Park, an unincorporated community in Lee County, Florida, supplying drinking water to over 200,000 customers across the county including nearby Cape Coral and Fort Myers. LCU draws groundwater from the Floridan Aquifer System via multiple wellfields, including the North Lee County Water Treatment Plant and South Lee County facilities. Water is pumped from wells screened into the aquifer's limestone layers, then treated and distributed through an extensive pipeline network covering residential, commercial, and industrial areas in central Lee County.
The Southwest Florida Water Management District recharge zone feeds the Floridan Aquifer System, a major karst aquifer beneath Lee County. Key geological formations include the Eocene Ocala Limestone and dolomitic layers of the Avon Park Formation — highly soluble Paleogene and Neogene carbonates. As groundwater percolates through sinkholes and conduits in the karst terrain, calcium and magnesium dissolve freely, imparting hard water character typical of southwest Florida groundwater and creating vulnerability to saltwater intrusion in coastal zones such as San Carlos Bay nearby.
Hard water in this area causes noticeable scale buildup in water heaters, dishwashers, coffee makers, and faucets, reducing efficiency and lifespan. Spots on glassware and soap scum in showers are common, with plumbing fixtures showing corrosion over time. Regular vinegar descaling, installing rinse aids in dishwashers, and sediment pre-filters help. A water softener is recommended. LCU's 2024 Consumer Confidence Report confirms EPA compliance; naturally occurring radon and low-level arsenic are addressed via aeration and blending.
Geology & Source: Lee County, FL; Floridan Aquifer System — karst limestone and dolomite including Eocene Ocala Limestone and Avon Park Formation; sinkholes and conduits enhance mineral dissolution, producing hard water high in calcium and magnesium
Other Florida Water Reports
Report an Issue
Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.
All reports are reviewed by our team. Thank you for supporting data quality!
Frequently Asked Questions
Is San Carlos Park's water safe to drink?
Do I need a water softener in San Carlos Park?
How does San Carlos Park compare to the USA average?
Data Sources & Methodology
Water quality data for San Carlos Park 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.