Stuart Water Hardness & Quality Report (2026)
Water Hardness
18.6 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
1069 mg/L
Est. Daily Cost
$0.85
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 Stuart, your appliances are currently losing 43% efficiency due to mineral buildup.
| Appliance | In Stuart | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Stuart compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Stuart, Florida | 319 mg/L | 12.6 ppt | 🔴 Very Hard | groundwater |
| Palm City, Florida | 167.5 mg/L | 7.8 ppt | 🟠 Hard | groundwater |
| Port Saint Lucie, Florida | 72.5 mg/L | 4.8 ppt | 🟡 Moderately Hard | groundwater |
| Fort Pierce, Florida | 307 mg/L | 12.2 ppt | 🔴 Very Hard | groundwater |
| Jupiter, Florida | 249.5 mg/L | 10.4 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Stuart compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Stuart | 319 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
Bring Badger-quality water to your Stuart home
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What Makes Stuart's Water Unique?
Local geology and source profile
Stuart, Florida, in Martin County — the Martin County seat adjacent to Palm City and Hobe Sound on the St. Lucie River and Indian River Lagoon on the Treasure Coast — receives its municipal water from the City of Stuart Water Division, drawing from the Floridan Aquifer (Upper Floridan, Martin County) through the Stuart treatment system that includes partial reverse osmosis for highly mineralized water.
The extremely hard 319 mg/L hardness and very high TDS of 1,069 mg/L reflect the south Treasure Coast Floridan Aquifer's deeply mineralized character — similar to the Palm Beach County Floridan (Sandalfoot Cove: 305 mg/L). The Upper Floridan Aquifer at Martin County is developed in Eocene Avon Park dolomite (moderately calcareous), Eocene Ocala Limestone (high purity carbonate), and Paleocene Cedar Keys Formation (evaporitic dolomite-anhydrite — major TDS contributor from Paleocene sea-bottom evaporite deposits). The deep Paleocene evaporitic component dramatically elevates TDS above the carbonate hardness alone.
At 319 mg/L with TDS 1,069, Stuart's water is extremely hard. A water softener is absolutely essential. Scale forms immediately on all surfaces, appliance lifespans are critically shortened, and water heaters fail within 2 years without treatment. The PFAS level of 12.6 ppt is very elevated and warrants a certified reverse osmosis drinking water filter — Witham Field Airport (Martin County — AFFF, the primary local Stuart PFAS source), and the Treasure Coast coastal military PFAS complex contribute to Stuart's very elevated readings.
Geology & Source: Stuart in Martin County draws from the Stuart Water Division on the Floridan Aquifer (Martin County, southeast Florida Treasure Coast) — the Upper Floridan is developed in Eocene Avon Park dolomite and Paleocene Cedar Keys Formation (evaporitic carbonate — highly mineralized) — Florida Martin County Upper Floridan deep evaporitic aquifer produces extremely hard water at 319 mg/L with TDS 1069 mg/L in this Martin County Florida city.