South Florida Water Quality Map — Hardness & Contaminant Data by City
South Florida has some of the hardest municipal water in the United States — 104 cities averaging 15–21 GPG across Broward, Palm Beach, and Miami-Dade counties. Explore the interactive map below to see your city's water hardness, contaminants, and treatment options.
Click any marker for city-specific water data. County boundaries shown as colored overlays.
All 104 South Florida Cities — Water Quality Data
Every city WaterLux serves across Broward, Palm Beach, and Miami-Dade counties, sorted by water hardness. All data is sourced from municipal water quality reports, the USGS National Water Information System, and the Florida Department of Health.
| City | County | Hardness (GPG) | PPM | Water Source | Response |
|---|
South Florida Water Quality — Common Questions
South Florida water hardness ranges from 14 to 25 GPG (240–425 PPM) depending on your city and water source. Palm Beach County averages 18.5 GPG (very hard), Broward County averages 17.1 GPG (very hard), and Miami-Dade averages 16.0 GPG (hard). Use the interactive map above to find your specific city. According to the USGS, water above 10.5 GPG is classified as very hard.
South Florida tap water meets EPA Safe Drinking Water Act standards. However, at 14–25 GPG it contains high levels of calcium and magnesium that cause scale buildup, reduce soap lathering, and accelerate appliance wear. Many cities also add chlorine for disinfection, affecting taste and smell. A whole-house filtration system is recommended for superior drinking water quality.
The most common issues in South Florida water include: calcium & magnesium (hardness/scale), chlorine and chloramines (disinfection byproducts), and sediment. Cities in northern Palm Beach County drawing from the Floridan Aquifer may also have elevated iron and hydrogen sulfide (sulfur odor). The Florida Department of Health monitors all municipal systems annually.
WaterLux offers free in-home water testing across all 104 service cities. A certified technician tests for hardness (GPG/PPM), chlorine, pH, iron, sulfur, and TDS — then provides a personalized system recommendation. Call (754) 317-0104 or schedule online. Same-day service for Broward County; 24-hour scheduling for Palm Beach and Miami-Dade.