Carol City Water Hardness & Quality Report (2026)
Water Hardness
13.3 grains per gallon
Source
groundwater
pH Level
8.4
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
664.4 mg/L
Est. Daily Cost
$0.61
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 Carol City, your appliances are currently losing 30% efficiency due to mineral buildup.
| Appliance | In Carol City | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 2.1 yrs | 8.5 yrs | -75% |
| Washing Machine | 5.2 yrs | 12 yrs | -57% |
| Water Heater | 6.5 yrs | 15 yrs | -57% |
Regional Water Comparison
How Carol City compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ 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 |
| Norland, Florida | 279.5 mg/L | 11.3 ppt | 🔴 Very Hard | groundwater |
| Opa-locka, Florida | 114 mg/L | 6.1 ppt | 🟡 Moderately Hard | groundwater |
National Benchmark
How Carol City compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Carol City | 227 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Carol City's Water Unique?
Local geology and source profile
Carol City, Florida (now Miami Gardens) — an unincorporated community and the incorporated City of Miami Gardens in northwest Miami-Dade County, home of Hard Rock Stadium (Miami Dolphins and University of Miami football) — draws its municipal water supply from the Biscayne Aquifer via the Miami-Dade Water and Sewer Department (WASD) treating northwest Miami-Dade County groundwater supply. Water hardness in Carol City–Miami Gardens measures 227 mg/L — classified as very hard.
Carol City's very hard supply reflects the northwest Miami-Dade County Biscayne Aquifer's natural carbonate character. The Biscayne Aquifer in northwest Miami-Dade County is formed in the Miami Limestone (Pleistocene oolitic Miami Limestone — one of the most porous and reactive calcareous formations in Florida) and the Fort Thompson Formation (Pleistocene freshwater limestone with fossil mollusks). The raw Biscayne Aquifer in northwest Miami-Dade (the Hialeah–Miami Gardens zone) is naturally very hard (300–500+ mg/L). The Miami-Dade WASD serves northwest Miami-Dade from treatment plants that apply conventional treatment (coagulation, filtration) but not full reverse osmosis treatment, resulting in the 227 mg/L — substantially reduced from the raw source but still very hard.
At 227 mg/L, Carol City–Miami Gardens residents face significant hard water challenges. Scale deposits form rapidly on all fixtures and tile — monthly 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 Northwest Miami-Dade County Surficial Biscayne Aquifer (Miami Limestone and Fort Thompson Formation) in Carol City–Miami Gardens; very hard supply at 227 mg/L — the naturally hard Biscayne Aquifer without full RO treatment in this northwest Miami-Dade zone.