Delray Beach Water Hardness & Quality Report (2026)
Water Hardness
16.1 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
870.2 mg/L
Est. Daily Cost
$0.74
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 Delray Beach, your appliances are currently losing 37% efficiency due to mineral buildup.
| Appliance | In Delray Beach | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3.4 yrs | 12 yrs | -72% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Delray Beach compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Delray Beach, Florida | 276 mg/L | 11.2 ppt | 🔴 Very Hard | groundwater |
| Boynton Beach, Florida | 87 mg/L | 5.3 ppt | 🟡 Moderately Hard | groundwater |
| Boca Raton, Florida | 320.5 mg/L | 12.6 ppt | 🔴 Very Hard | groundwater |
| Boca Del Mar, Florida | 319 mg/L | 12.6 ppt | 🔴 Very Hard | groundwater |
| Deerfield Beach, Florida | 270 mg/L | 11 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Delray Beach compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Delray Beach | 276 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Delray Beach's Water Unique?
Local geology and source profile
Delray Beach, Florida, in south Palm Beach County on the Atlantic Coast — an affluent coastal city known for Atlantic Avenue's restaurant and nightlife scene and one of America's liveliest small-city downtowns — draws its municipal water supply from the Biscayne Aquifer (South Palm Beach County Surficial Aquifer) via the City of Delray Beach Utilities Department, pumping from coastal Palm Beach County aquifer wells accessing the Anastasia Formation (Pleistocene coquina limestone — porous calcareous reef limestone) and the Fort Lauderdale Formation in the Delray Beach area. Water hardness in Delray Beach reaches 276 mg/L — classified as very hard.
Delray Beach's very hard supply reflects the south Palm Beach County coastal aquifer's natural carbonate character. Unlike Boynton Beach immediately to the north (87 mg/L — using RO treatment), Delray Beach relies on conventional treatment of the naturally very hard Biscayne Aquifer supply. The Anastasia Formation (Pleistocene coquina — shell hash and coral reef debris cemented by calcium carbonate) is one of the most reactive calcareous formations in Florida, producing very high dissolved calcium in shallow coastal groundwater throughout Palm Beach and Broward Counties. Without reverse osmosis treatment, the finished Delray Beach supply retains the high natural hardness of the Anastasia Formation aquifer at 276 mg/L.
At 276 mg/L, Delray Beach residents face significant hard water challenges. Scale deposits form rapidly on all fixtures, shower glass, and tile — monthly descaling with citric acid solution is essential maintenance. Dishwashers require rinse-aid. City of Delray Beach Utilities Department consistently delivers water meeting all Florida DEP and EPA Safe Drinking Water Act requirements.
Geology & Source: Groundwater from the Biscayne Aquifer via the City of Delray Beach Utilities Department — the Palm Beach County Surficial Aquifer (Biscayne equivalent) (Anastasia Formation limestone and Fort Lauderdale Formation) in south Palm Beach County; very hard supply at 276 mg/L — among the hardest in Palm Beach County — reflecting the naturally hard south Palm Beach coastal aquifer without RO treatment.