North Miami Water Hardness & Quality Report (2026)
Water Hardness
17.3 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
960.6 mg/L
Est. Daily Cost
$0.79
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 North Miami, your appliances are currently losing 39% efficiency due to mineral buildup.
| Appliance | In North Miami | 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 North Miami compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ North Miami, Florida | 296 mg/L | 11.9 ppt | 🔴 Very Hard | groundwater |
| Golden Glades, Florida | 139 mg/L | 6.9 ppt | 🟠 Hard | groundwater |
| Pinewood, Florida | 280.5 mg/L | 11.4 ppt | 🔴 Very Hard | groundwater |
| North Miami Beach, Florida | 296 mg/L | 11.9 ppt | 🔴 Very Hard | groundwater |
| West Little River, Florida | 168.5 mg/L | 7.9 ppt | 🟠 Hard | groundwater |
National Benchmark
How North Miami compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ North Miami | 296 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes North Miami's Water Unique?
Local geology and source profile
North Miami, Florida, in north Miami-Dade County adjacent to North Miami Beach and the Biscayne Bay shoreline — an economically diverse community home to a significant Haitian-American population and Johnson & Wales University — draws its municipal water supply from the Biscayne Aquifer via the Miami-Dade Water and Sewer Department (WASD) treating north Miami-Dade groundwater. Water hardness in North Miami reaches 296 mg/L — classified as very hard.
North Miami's very hard supply reflects the Biscayne Aquifer's natural carbonate character in north Miami-Dade County. The Biscayne Aquifer beneath North Miami is formed in the Miami Limestone (Pleistocene oolitic limestone — porous, highly reactive calcareous), the Fort Thompson Formation (Pleistocene freshwater limestone with abundant fossil mollusk shells), and the overlying Anastasia Formation (Pleistocene coquina limestone). These Pleistocene calcareous formations are among the most reactive and calcareous natural aquifer materials in the United States — essentially pure calcium carbonate producing very hard groundwater throughout the Miami metropolitan area. The Miami-Dade WASD serves North Miami through conventional treatment without full RO softening in this zone, maintaining the naturally very hard 296 mg/L supply.
At 296 mg/L, North Miami residents face significant hard water challenges. Scale deposits form rapidly on all fixtures, tile, and appliances — monthly or more frequent descaling with citric acid solution is essential maintenance. Miami-Dade Water and Sewer Department consistently delivers water meeting all Florida DEP and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Biscayne Aquifer via the Miami-Dade Water and Sewer Department (WASD) — the North Miami-Dade County Biscayne Aquifer (Miami Limestone and Fort Thompson Formation); very hard supply at 296 mg/L — the naturally hard Biscayne Aquifer in the north Miami-Dade zone without full RO treatment.