Osceola County, Florida: drinking water report. Osceola County sits south of Orlando, home to about 430,000 residents in one of the fastest-growing
Osceola County sits south of Orlando, home to about 430,000 residents in one of the fastest-growing counties in Florida. Toho Water Authority is the primary provider, drawing from the Floridan Aquifer. The county's explosive growth – driven partly by tourism infrastructure overflow from the Disney/Kissimmee corridor – has pushed water infrastructure to expand rapidly.
Osceola County's Floridan Aquifer water is naturally hard and may contain hydrogen sulfide in some wells. Treatment includes aeration, softening, and disinfection. UCMR5 data shows PFAS detections in some county systems, though at levels generally lower than in neighboring Orange County.
According to the Florida DEP's 2024 monitoring data, two Osceola County water systems reported PFAS above detection thresholds. The county's rapid development means new wells are being drilled and new treatment capacity is being added continuously, with each new source potentially carrying a different quality profile.
Rapid growth areas may experience temporary water quality variability as new infrastructure is commissioned and stabilized.
Check your water for data specific to your provider. A reverse osmosis system handles hardness, sulfide taste, and any PFAS present. Our water filter guide covers options for Florida's specific water challenges. Pull your detailed report, and visit our Florida page for statewide data.
Drinking water is one exposure route. These federal datasets also cover Osceola County, FL.
The EPA places Osceola County, FL in Zone 3 - the EPA's lowest-risk category, with a predicted average indoor radon level below 2 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
11% of homes in Osceola County, FL were built before 1980, and 2% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Osceola County, FL averages 7.8 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide