Sunny Isles Beach Water Hardness & Quality Report (2026)
Water Hardness
4.5 grains per gallon
Source
groundwater
pH Level
7.4
neutral = 7.0
Lead
0.001 mg/L
✓ Below action level
TDS
173.3 mg/L
Est. Daily Cost
$0.21
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 Sunny Isles Beach, your appliances are currently losing 10% efficiency due to mineral buildup.
| Appliance | In Sunny Isles Beach | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 7 yrs | 8.5 yrs | -18% |
| Washing Machine | 10.7 yrs | 12 yrs | -11% |
| Water Heater | 12.5 yrs | 15 yrs | -17% |
Regional Water Comparison
How Sunny Isles Beach compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Sunny Isles Beach, Florida | 77.5 mg/L | 5 ppt | 🟡 Moderately Hard | groundwater |
| Aventura, Florida | 120.5 mg/L | 6.4 ppt | 🟠 Hard | groundwater |
| Ojus, Florida | 94 mg/L | 5.5 ppt | 🟡 Moderately Hard | groundwater |
| Hallandale Beach, Florida | 236.5 mg/L | 10 ppt | 🔴 Very Hard | groundwater |
| North Miami Beach, Florida | 296 mg/L | 11.9 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Sunny Isles Beach compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sunny Isles Beach | 77.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Sunny Isles Beach's Water Unique?
Local geology and source profile
Sunny Isles Beach, Florida, in Miami-Dade County — a barrier island city in northern Miami-Dade, known for its high-rise condominium skyline (dubbed the "Monaco of Miami") along the Atlantic barrier shore between Aventura and Bal Harbour — receives its municipal water from Miami-Dade Water and Sewer Department (MDWASD), which draws from the Biscayne Aquifer and applies advanced membrane treatment technology at coastal water treatment facilities. Sunny Isles Beach's supply reflects MDWASD's increasingly sophisticated treatment approach in the coastal barrier island zone.
The soft 77.5 mg/L hardness and TDS of 173.3 mg/L are dramatically softer than the typical raw Biscayne Aquifer hardness (~200–350 mg/L in most Miami-Dade production zones), indicating that the MDWASD coastal plant serving Sunny Isles Beach employs nanofiltration or reverse osmosis membrane treatment to reduce carbonate hardness and TDS. The Biscayne Aquifer — a highly permeable Pleistocene oolitic limestone (Miami Limestone, Fort Thompson Formation) — produces inherently very hard, high-TDS groundwater throughout Miami-Dade. MDWASD's advanced membrane systems at the South Dade and Hialeah Water Treatment Plants can deliver much softer finished water than conventional lime softening allows, and the Sunny Isles Beach coastal distribution zone benefits from a treatment train that significantly reduces the raw aquifer hardness.
At 77.5 mg/L, Sunny Isles Beach's water is soft — one of the softer readings in Florida's coastal barrier island communities. Scale forms slowly over many months, soap lathers well, and the dishwasher produces clean results. Semi-annual descaling of heating appliances is adequate. The PFAS level of 5.0 ppt warrants a certified drinking water filter — Miami-Dade's dense urban development, the Opa-locka and Homestead Air Reserve Base AFFF contamination zones, and the South Florida military-industrial PFAS complex contribute to the background, though MDWASD's membrane treatment also significantly reduces PFAS levels in the finished supply.
Geology & Source: Sunny Isles Beach in Miami-Dade County is served by Miami-Dade Water and Sewer (MDWASD) drawing from the Biscayne Aquifer with advanced nanofiltration or reverse osmosis treatment — MDWASD's coastal zone plants apply membrane treatment to remove hardness from the carbonate aquifer supply — membrane treatment of the Biscayne carbonate limestone aquifer produces soft finished water at 77.5 mg/L with TDS 173 mg/L in this Miami-Dade barrier island community.