Opa-locka Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
Source
groundwater
pH Level
7.7
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
274 mg/L
Est. Daily Cost
$0.40
energy & soap waste
Source: See methodology section below · 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 20% efficiency due to mineral buildup.
| Appliance | In Opa-locka | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Opa-locka compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Opa-locka, Florida | ≈ 120–179 mg/L | 6.1 ppt | 🟠 Hard | groundwater |
| Carol City, Florida | ≈ 120–179 mg/L | 9.7 ppt | 🟠 Hard | groundwater |
| Miami Gardens, Florida | ≈ 120–179 mg/L | 625.1 ppt | 🟠 Hard | groundwater |
| Scott Lake, Florida | ≈ 120–179 mg/L | 6.6 ppt | 🟠 Hard | groundwater |
| Pinewood, Florida | ≈ 180+ mg/L | 11.4 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Opa-locka compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Opa-locka | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Opa-locka's Water Unique?
Local geology and source profile
OPA LOCKA, CITY OF serves the City of Opa-Locka in Miami-Dade County, Florida, with offices at 780 Fisherman Street, Opa-Locka, FL 33054. Water is drawn entirely from the Biscayne Aquifer, a local groundwater system. No specific treatment plants are identified in available data, and the supply reportedly receives no treatment or disinfection, relying on the natural quality of the aquifer. The 2023 Annual Drinking Water Quality Report confirms compliance with federal and state standards. Emergency contact: (305) 953-2868; general inquiries: (305) 953-2828.
The Biscayne Aquifer spans the southeastern U.S. coastal plain, underlying Miami-Dade and adjacent counties, recharged by local rainfall through canals and wetlands including the Everglades. It is hosted in Quaternary and Pleistocene limestone formations, including the Miami Oolite, a porous reef limestone rich in calcium carbonate. This karst geology promotes rapid infiltration and mineral dissolution, imparting a hard character to the groundwater with elevated dissolved solids from limestone weathering, moderated by the aquifer's shallow, well-oxygenated flow paths.
Hard water causes moderate scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and causing spotting on glassware and soap scum. Faucets and showerheads may clog over time. Maintenance includes periodic vinegar descaling for fixtures and coffee makers, using rinse agents in dishwashers, and checking water heaters annually. A water softener is recommended for whole-house treatment to extend appliance life and improve cleaning. Water quality scores 80/100 per Tap Water Data, with 2 contaminants above health guidelines; the 2023 CCR states full compliance.
Geology & Source: Biscayne Aquifer, southeast Florida; Pleistocene-age Miami Limestone (oolitic) and Fort Thompson Formation — calcareous sands, limestone, shell fragments; carbonate dissolution releases calcium and magnesium, producing naturally hard groundwater
Other Florida Water Reports
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Frequently Asked Questions
Is Opa-locka's water safe to drink?
Do I need a water softener in Opa-locka?
How does Opa-locka compare to the USA average?
Data Sources & Methodology
Water quality data for Opa-locka is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.