Naples Water Hardness & Quality Report (2026)
Water Hardness
13.4 grains per gallon
Source
groundwater
pH Level
8.4
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
672.1 mg/L
Est. Daily Cost
$0.61
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 Naples, your appliances are currently losing 31% efficiency due to mineral buildup.
| Appliance | In Naples | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2 yrs | 8.5 yrs | -76% |
| Washing Machine | 5.1 yrs | 12 yrs | -58% |
| Water Heater | 6.4 yrs | 15 yrs | -57% |
Regional Water Comparison
How Naples compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Naples, Florida | 229 mg/L | 9.8 ppt | 🔴 Very Hard | groundwater |
| East Naples, Florida | 106.5 mg/L | 5.9 ppt | 🟡 Moderately Hard | groundwater |
| Golden Gate, Florida | 138 mg/L | 6.9 ppt | 🟠 Hard | groundwater |
| Marco, Florida | 269 mg/L | 11 ppt | 🔴 Very Hard | groundwater |
| Bonita Springs, Florida | 72.5 mg/L | 4.9 ppt | 🟡 Moderately Hard | groundwater |
National Benchmark
How Naples compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Naples | 229 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Naples's Water Unique?
Local geology and source profile
Naples, Florida, in Collier County — a prestigious Gulf Coast resort city and the Collier County seat in Southwest Florida's Big Cypress/Everglades corridor, renowned for the Third Street South and Fifth Avenue South upscale shopping districts, Naples Pier, and the distinctive low-rise luxury residential and marina character of Lee-Collier County's highest-wealth coastal zone — receives its municipal water from the City of Naples Utilities or Collier County Water-Sewer District, which draws from the Upper Floridan Aquifer or deeper Hawthorn Group and Lower Floridan carbonate-evaporite systems through production wells in the Collier County karst plain.
The very hard 229 mg/L hardness and very elevated TDS of 672.1 mg/L are among the most demanding in the Florida dataset — harder than central Hillsborough County (Westchase 159.5 mg/L) and approaching the extreme Fort Walton Beach evaporite-artesian profile. In Collier County's deep, highly confined Floridan Aquifer production zone, groundwater accesses the Eocene Avon Park Formation (thick dolomitic carbonate with interbedded evaporite facies) and potentially the Lower Floridan or Hawthorn Group (phosphatic and calcareous sediments). The deep confinement in South Florida's Floridan system means prolonged water-rock contact time and extensive dissolution of calcium, magnesium, and sulfate from evaporite-bearing carbonate formations — producing very hard, high-TDS artesian water in the Naples production wells.
At 229 mg/L with TDS 672 mg/L, Naples residents face very challenging water quality demands. Scale forms rapidly on appliances and fixtures — water heaters, coffee machines, and dishwashers require immediate softening intervention, and bathroom fixtures develop heavy calcium deposits within weeks. A whole-house water softener is strongly recommended, and regular appliance descaling is essential. The PFAS level of 9.8 ppt additionally warrants a certified drinking water filter — Collier County's military overflight corridors, the Naples Airport and related aviation PFAS sources, and South Florida's broader PFAS contamination background from agricultural and suburban development contribute to this elevated reading.
Geology & Source: Naples in Collier County draws from Naples/Collier County Utilities treating the deep Floridan Aquifer — the Floridan Aquifer beneath Collier County accesses highly confined Eocene Avon Park Formation and Lower Floridan carbonate-evaporite systems — prolonged water-rock contact in the deep confined Southwest Florida Floridan produces very hard water at 229 mg/L with very elevated TDS 672 mg/L in this Gulf Coast Collier County resort city.