Opa-locka Water Hardness & Quality Report (2026)
Water Hardness
6.7 grains per gallon
Source
groundwater
pH Level
7.7
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
274 mg/L
Est. Daily Cost
$0.30
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 Opa-locka, your appliances are currently losing 15% efficiency due to mineral buildup.
| Appliance | In Opa-locka | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.8 yrs | 8.5 yrs | -32% |
| Washing Machine | 9.4 yrs | 12 yrs | -22% |
| Water Heater | 11 yrs | 15 yrs | -27% |
Regional Water Comparison
How Opa-locka compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Opa-locka, Florida | 114 mg/L | 6.1 ppt | 🟡 Moderately Hard | groundwater |
| Carol City, Florida | 227 mg/L | 9.7 ppt | 🔴 Very Hard | groundwater |
| Miami Gardens, Florida | 88 mg/L | 5.3 ppt | 🟡 Moderately Hard | groundwater |
| Scott Lake, Florida | 127 mg/L | 6.6 ppt | 🟠 Hard | groundwater |
| Pinewood, Florida | 280.5 mg/L | 11.4 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Opa-locka compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Opa-locka | 114 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Opa-locka's Water Unique?
Local geology and source profile
Opa-locka, Florida, in Miami-Dade County — a Miami-Dade County city adjacent to Hialeah and Miami Gardens in the north Miami metro — receives its municipal water from Miami-Dade Water and Sewer Department (WASD), drawing from the Biscayne Aquifer through county well fields (northwest Miami-Dade).
The moderately hard 114 mg/L hardness and TDS of 274 mg/L reflect the Miami-Dade Biscayne Aquifer character — somewhat softer than the Glenvar Heights reading (131.5 mg/L) from the same WASD system, reflecting slight variation in the Biscayne Aquifer across north Miami-Dade. The Biscayne Aquifer is developed in Quaternary Miami Limestone (very porous oolitic calcarenite), Pleistocene Key Largo Limestone (porous reef limestone), and Fort Thompson Formation (calcareous freshwater marl). The highly porous calcareous limestone dissolves carbonate into groundwater, producing the moderately hard south Florida supply.
At 114 mg/L, Opa-locka's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 6.1 ppt warrants a certified drinking water filter — Opa-locka Executive Airport (AFFF — the primary local Opa-locka PFAS source, directly within the city), and the north Miami-Dade industrial corridor contribute to Opa-locka's readings.
Geology & Source: Opa-locka in Miami-Dade County draws from Miami-Dade Water and Sewer on the Biscayne Aquifer (Miami-Dade County, north Miami metro) — the Biscayne Aquifer is developed in Quaternary Miami Limestone and Pleistocene Key Largo Limestone (very porous calcareous) — Florida Miami-Dade County Biscayne Quaternary karst limestone aquifer produces moderately hard water at 114 mg/L with TDS 274 mg/L in this Miami-Dade County Florida city.