Cape Coral Water Hardness & Quality Report (2026)
Water Hardness
4 grains per gallon
Source
groundwater
pH Level
8
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
623.2 mg/L
Est. Daily Cost
$0.18
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 Cape Coral, your appliances are currently losing 9% efficiency due to mineral buildup.
| Appliance | In Cape Coral | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.3 yrs | 8.5 yrs | -14% |
| Washing Machine | 11.1 yrs | 12 yrs | -8% |
| Water Heater | 12.9 yrs | 15 yrs | -14% |
Regional Water Comparison
How Cape Coral compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Cape Coral, Florida | 68.24 mg/L | 0 ppt | 🟡 Moderately Hard | groundwater |
| Iona, Florida | ≈ 180+ mg/L | 7.9 ppt | 🔴 Very Hard | groundwater |
| Cypress Lake, Florida | ≈ 120–179 mg/L | 9.7 ppt | 🟠 Hard | groundwater |
| Villas, Florida | ≈ 120–179 mg/L | 4.9 ppt | 🟠 Hard | groundwater |
| Fort Myers, Florida | 30 mg/L | 121.1 ppt | 🟢 Soft | reservoir |
National Benchmark
How Cape Coral compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Cape Coral | 68.24 mg/L | 🟡 Low |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
Bring Scarsdale-quality water to your Cape Coral home
Shop water softeners on Amazon.com →
What Makes Cape Coral's Water Unique?
Local geology and source profile
The City of Cape Coral Utilities Department provides water to residents across Lee County, serving a population of over 200,000 in this Southwest Florida coastal city. Water is sourced exclusively from the Lower Hawthorn aquifer via multiple deep wells, with production and treatment at city-operated facilities including the Four Mile Cove and Del Prado water treatment plants. No surface water is used, ensuring a reliable groundwater-based supply managed under strict regulatory oversight by the Florida Department of Environmental Protection.
The supply originates within the Southwest Florida groundwater basin, where the Lower Hawthorn aquifer — composed of Miocene-era marine sediments, limestone, and dolomite — underlies the region. This karst aquifer system allows water to interact extensively with carbonate rock formations, imparting a moderately mineralised character rich in calcium and magnesium. Natural dissolution processes elevate total dissolved solids without reliance on surface runoff variability, shaping a stable but geologically influenced chemistry.
At moderate hardness levels, scale buildup in pipes, water heaters, dishwashers, and washing machines reduces efficiency and lifespan. Faucets and fixtures may develop mineral deposits leading to reduced flow. Regular maintenance including vinegar descaling, installing scale-inhibiting filters, and flushing water heaters is advised; a whole-house water softener is often recommended for households experiencing soap lathering issues or appliance wear. City water meets all EPA standards for pH (typically 7.5–8.5), lead, and copper, with no recent violations; PFAS levels are low and compliant, with disinfection byproducts managed through advanced treatment including chloramination, filtration, and corrosion control.
Geology & Source: Lower Hawthorn aquifer — Miocene-era marine sediments, limestone, and dolomite in Southwest Florida's karst terrain; prolonged carbonate contact dissolves calcium and magnesium, elevating dissolved solids and producing a moderately mineralized supply
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 Cape Coral's water safe to drink?
Do I need a water softener in Cape Coral?
How does Cape Coral compare to the USA average?
Data Sources & Methodology
Water quality data for Cape Coral 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.