St Lucie County, Florida: drinking water report. St. Lucie County – Port St. Lucie and Fort Pierce – serves about 350,000 residents on Florida's Treasure…
St. Lucie County – Port St. Lucie and Fort Pierce – serves about 350,000 residents on Florida's Treasure Coast. Water comes from the Floridan Aquifer and the surficial aquifer, treated at multiple facilities. The county has been one of the fastest-growing in Florida, with infrastructure racing to keep up with development.
Under the EPA's UCMR5 program (2023-2025), public water systems across St. Lucie County, covering Port St. Lucie, Fort Pierce, and the surrounding Treasure Coast communities, tested for 29 PFAS compounds. PFAS turned up in several county systems, but levels vary sharply by utility, so the county-wide picture hides the part that matters: your specific water system.
Port St. Lucie's main system, the county's largest, tested low. Its highest PFOS reading in the UCMR5 data was about 0.01 ppt, far under the EPA's 4 ppt limit. Other county systems reported detections above thresholds in Florida DEP monitoring, which is why "St. Lucie County" and "Fort Pierce" PFAS questions keep surfacing in the EPA data. The 2024 federal rule makes 4 ppt for PFOA and PFOS enforceable, so even one reading over that line forces a utility to act, and the spread between the county's cleanest and most-affected systems is exactly why you should check your own.
The county also faces the rest of the Florida mix: hard water, hydrogen sulfide in some wells, and seasonal surface-water impacts from Lake Okeechobee discharges through the St. Lucie Canal.
See the verified breakdown for Port St. Lucie, the county's largest system.
Rapid growth and environmental pressures from Lake Okeechobee discharges make water quality worth monitoring in St. Lucie County.
Check your water for data specific to your area. Reverse osmosis provides comprehensive treatment for Florida's typical contaminant mix. Our water filter guide covers options. Pull your detailed report, and visit our Florida page for statewide data.
Drinking water is one exposure route. These federal datasets also cover St Lucie County, FL.
The EPA places St Lucie 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.
22% of homes in St Lucie 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 St Lucie County, FL averages 6.8 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