On Top of the World Water Hardness & Quality Report (2026)
Water Hardness
15.1 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
796.1 mg/L
Est. Daily Cost
$0.69
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 On Top of the World, your appliances are currently losing 35% efficiency due to mineral buildup.
| Appliance | In On Top of the World | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 4 yrs | 12 yrs | -67% |
| Water Heater | 5.2 yrs | 15 yrs | -65% |
Regional Water Comparison
How On Top of the World compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ On Top of the World, Florida | 259 mg/L | 10.7 ppt | 🔴 Very Hard | groundwater |
| Marion Oaks, Florida | 279.5 mg/L | 11.3 ppt | 🔴 Very Hard | groundwater |
| Ocala, Florida | 80.5 mg/L | 5.1 ppt | 🟡 Moderately Hard | groundwater |
| The Villages, Florida | 157.5 mg/L | 7.5 ppt | 🟠 Hard | groundwater |
| Lady Lake, Florida | 301 mg/L | 12 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How On Top of the World compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ On Top of the World | 259 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes On Top of the World's Water Unique?
Local geology and source profile
On Top of the World, Florida, in Marion County — a Marion County planned retirement community adjacent to Ocala in north-central Florida — receives its water from the On Top of the World Water system, drawing from the Floridan Aquifer (Marion County) through the north-central Florida distribution.
The very hard 259 mg/L hardness and TDS of 796.1 mg/L reflect the north-central Florida Marion County Floridan Aquifer supply's extreme calcareous character — the Eocene Ocala Limestone and Oligocene Suwannee Limestone produce very hard calcareous water at Marion County, one of the highest hardness and TDS levels in the Floridan Aquifer system (compare Florida City FL: 330/943 at the Miami-Dade end; Key Biscayne FL: 300/875; On Top of the World among the hardest in north-central Florida). The Floridan Aquifer at Marion County — Eocene Ocala Limestone (highly calcareous — primary hardness contributor), Oligocene Suwannee Limestone (highly calcareous — secondary contributor), and Pliocene Hawthorn Group (calcareous — minor).
At 259 mg/L with TDS 796, On Top of the World's water is very hard. A water softener is strongly recommended to prevent rapid scale buildup. A reverse osmosis system is advisable for drinking water. The PFAS level of 10.7 ppt warrants a certified drinking water filter — the Marion County north-central Florida agricultural and industrial corridor contribute to On Top of the World's elevated PFAS readings.
Geology & Source: On Top of the World in Marion County draws from the On Top of the World Water on the Floridan Aquifer (Marion County, north-central Florida) — the Floridan Aquifer at Marion County is developed in Eocene Ocala Limestone (highly calcareous) and Oligocene Suwannee Limestone (highly calcareous) — Florida Marion County Floridan Aquifer Eocene-Oligocene highly calcareous supply produces very hard water at 259 mg/L with TDS 796.1 mg/L.