Typical values from 63 sampled wells in Osceola County · Full groundwater profile
What Are You Noticing in Your Water?
Pre-selected from Osceola County well data. Untick anything you do not notice in your own water.
Based on the contaminants most commonly reported in this region. Always confirm with a certified lab water test before buying equipment.
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Most homes in Osceola County, in Central Florida, are on public water, but 6.3% of built parcels, roughly 8,655 properties, still draw drinking water from a private well, according to the Florida Department of Health's 2022 inventory.
Most groundwater pumped in Osceola County comes from the Floridan Aquifer (USGS, 2015 withdrawals). Samples from 63 local wells put the median hardness at 10.2 gpg (hard) and median iron at 0.11 mg/L. The county's largest communities are Kissimmee, St. Cloud and Poinciana.
In this guide
Groundwater Profile: Osceola County
Most groundwater pumped in Osceola County comes from the Floridan Aquifer (USGS, 2015 withdrawals). Across 63 sampled wells, the median hardness is 10.2 gpg, which the USGS classes as hard. It applies to wells across Osceola County, including around Kissimmee, St. Cloud and Poinciana.
What shows up in local well samples:
- HardnessMedian 10.2 gpg; 59% of 63 sampled wells above 7 gpg
Calcium and magnesium dissolved from limestone. Leaves scale on fixtures and water heaters and reduces soap lather. Not a health risk.
Water softener sizing
Hydrogen sulfide (the rotten-egg smell) was measured in only 6 Osceola County wells, too few to say how common it is. Limited local data (fewer than 20 samples): individual well testing recommended. If you notice the smell, a sulfide test confirms it.
How Osceola County Compares to Florida and the U.S.
See How Osceola County Compares to Florida & the US
| Share of wells with… | Osceola CountyOsceola | FloridaFL | United StatesUS |
|---|---|---|---|
| Hard water (above 7 gpg) | 59% | 79% | 60% |
| Iron above 0.3 mg/L | 32% | 35% | 19% |
| Manganese above 0.05 mg/L | 0% | 8% | 21% |
| Dissolved solids above 500 mg/L | 22% | 22% | 15% |
| Acidic water (pH below 6.5) | 27% | 15% | 14% |
| Nitrate above 10 mg/L (EPA limit) | Limited data | 2% | 4% |
| Arsenic above 10 µg/L (EPA limit) | 0% | 3% | 7% |
| Median hardness | 10.2 gpg | 12.4 gpg | — |
| Median pH | 7.5 | 7.2 | 7.3 |
Osceola County and Florida: share of sampled wells (all well types, samples since 2000) whose typical value exceeds the level, from the Water Quality Portal. United States: USGS Circular 1332, about 2,100 domestic wells in 48 states sampled 1991 to 2004. Well types and years differ, so read this as a broad comparison. Highlighted cells are well above the national share.
See what a typical Osceola County well needs
Opens the diagnostic calculator with Osceola County median values (10.2 gpg hardness, 0.11 ppm iron, pH 7.5) for a 3–4 person home. Swap in your own lab results for an exact plan.
Testing Your Well in Osceola County
The Florida Department of Health in Osceola County oversees private well permitting in the county and investigates suspected contamination. For routine bacteria, nitrate or full-panel tests, use a laboratory certified by the Florida Department of Health.
What to test for in Osceola County:
- Bacteria (total coliform and E. coli) and nitrate, at least once a year (Florida Department of Health recommendation)
- Hardness in grains per gallon (gpg) to size a softener
- After any flood, new well work or a change in taste, color or smell
The Florida Department of Health in Osceola County can explain how to collect samples and where to send them. Statewide guidance is on the FDOH private well testing page, and our guide to how to test well water covers which tests to order.
Nearby Counties
Osceola County borders these counties with published reports:
Frequently Asked Questions
How many homes in Osceola County use private wells?
The Florida Department of Health’s Florida Water Management Inventory (2022 data) found 6.3% of built parcels in Osceola County on private wells, roughly 8,655 properties.
How hard is well water in Osceola County?
Groundwater samples from 63 wells in Osceola County have a median hardness of 10.2 grains per gallon (174 mg/L), which the USGS classes as hard. About 59% of sampled wells are above 7 gpg, the point where a water softener is usually worthwhile. The Florida statewide median is 12.4 gpg.
Is iron a problem in Osceola County well water?
The median iron level across 54 sampled wells is 0.11 mg/L, below the EPA aesthetic guideline of 0.3 mg/L, and 32% of wells exceed it. Most wells will not stain, but if yours does, a lab test tells you whether iron or manganese is the cause.
Why does my well water smell like rotten eggs in Osceola County?
Hydrogen sulfide (the rotten-egg smell) was measured in only 6 Osceola County wells, too few to say how common it is. Limited local data (fewer than 20 samples): individual well testing recommended. If you notice the smell, a sulfide test confirms it. The smell is a nuisance rather than a health risk at typical levels.
Which aquifer supplies wells in Osceola County?
Most groundwater pumped in Osceola County comes from the Floridan Aquifer (USGS, 2015 withdrawals).
Does boiling well water make it safe to drink in Osceola County?
Only if bacteria are the problem. A one-minute rolling boil kills germs, but it does not remove nitrate, arsenic or other chemicals, and it concentrates them as water evaporates. Test first, and see our boiling well water myth buster for when boiling helps.
How often should I test my well water in Osceola County?
The Florida Department of Health recommends testing private wells for bacteria and nitrate at least once a year, and again after flooding or well repairs. The Florida Department of Health in Osceola County can explain how to collect and submit samples.
Written by Well Water Advisor Editorial Team.