San Carlos Park Water Hardness & Quality Report (2026)
Water Hardness
4.4 grains per gallon
Source
groundwater
pH Level
7.4
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
168.1 mg/L
Est. Daily Cost
$0.20
energy & soap waste
Source: USGS Water Quality Portal · 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 10% efficiency due to mineral buildup.
| Appliance | In San Carlos Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7.1 yrs | 8.5 yrs | -16% |
| Washing Machine | 10.8 yrs | 12 yrs | -10% |
| Water Heater | 12.6 yrs | 15 yrs | -16% |
Regional Water Comparison
How San Carlos Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ San Carlos Park, Florida | 75.5 mg/L | 4.9 ppt | 🟡 Moderately Hard | groundwater |
| Estero, Florida | 161 mg/L | 7.6 ppt | 🟠 Hard | groundwater |
| Bonita Springs, Florida | 72.5 mg/L | 4.9 ppt | 🟡 Moderately Hard | groundwater |
| Fort Myers, Florida | 304.5 mg/L | 12.1 ppt | 🔴 Very Hard | groundwater |
| Iona, Florida | 168.5 mg/L | 7.9 ppt | 🟠 Hard | groundwater |
National Benchmark
How San Carlos Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ San Carlos Park | 75.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes San Carlos Park's Water Unique?
Local geology and source profile
San Carlos Park, Florida, in Lee County — an unincorporated Lee County community adjacent to Estero and Fort Myers in the Fort Myers metro of southwest Florida — receives its municipal water from Lee County Utilities, drawing from the Sandstone Aquifer or surficial aquifer system through Lee County well fields in southwest Florida.
The moderately soft 75.5 mg/L hardness and low TDS of 168.1 mg/L are relatively soft for a Florida aquifer supply — softer than the Miami-Dade Biscayne Aquifer (Glenvar Heights: 131.5 mg/L) and Tampa Bay area supplies. The Lee County Sandstone Aquifer is developed in Miocene Hawthorn Group calcareous sand (moderately soluble — less pure than the Miami Limestone), Eocene Avon Park Formation (dolomitic limestone — calcareous but produces lower hardness than the pure Miami Limestone), and Oligocene Suwannee Limestone (low purity). The southwest Florida aquifer at Lee County produces a moderately soft supply compared to southeast Florida.
At 75.5 mg/L, San Carlos Park's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 4.9 ppt warrants a certified drinking water filter — the Lee County Fort Myers metro suburban corridor, Page Field (Fort Myers municipal airport — AFFF), and the southwest Florida PFAS background contribute to San Carlos Park's readings.
Geology & Source: San Carlos Park in Lee County draws from Lee County Utilities on the Sandstone Aquifer (Lee County, southwest Florida) — the Sandstone Aquifer is developed in Miocene Hawthorn Group calcareous sand and Eocene Avon Park Formation limestone — Florida Lee County Miocene-Eocene Hawthorn calcareous sandstone aquifer produces moderately soft water at 75.5 mg/L with TDS 168.1 mg/L in this Lee County Florida community.