Florida Well Water: The 2026 Homeowner's Treatment Guide

The Florida Department of Health publishes annual guidance on private well testing. The headline list of common contaminants in Florida well water includes total coliform and E. coli bacteria, nitrates, iron, manganese, hydrogen sulfide, low pH (acidic water), hardness, sediment, and in some regions arsenic and radon. Not every well has every issue. Iron and sulfur dominate the symptom list because they produce visible staining and obvious smell. Bacteria and nitrates are the invisible ones, and they are the two FDOH recommends every well owner test for annually. The USGS Floridan Aquifer system reports also document elevated arsenic in certain pockets of Florida groundwater, particularly where the aquifer has been disturbed by aquifer storage and recovery operations or industrial activity. A real well test panel runs 10 to 14 analytes and is the only honest way to start. Visual symptoms tell you something is wrong, but they cannot tell you which contaminants are present or at what concentrations.

Step one is to look. Orange staining points to ferrous iron above 0.3 ppm. Black staining points to manganese above 0.05 ppm or sulfur bacteria. Step two is to smell. A rotten-egg odor at the hot tap is hydrogen sulfide gas, almost always biological in origin (sulfate-reducing bacteria in the anaerobic zone of the well). Step three is to feel. Slippery water after soap typically points to softening already in place, or to high pH; squeaky water after soap typically points to high hardness. Step four is to taste. Metallic taste is iron or copper, salty is sodium or chloride above background, bitter is often magnesium. Step five is to test. A standard well panel covers bacteria, nitrate, nitrite, iron, manganese, hardness, pH, hydrogen sulfide, TDS, and chloride. Add arsenic if you live near former agricultural land, radon if you live in north-central Florida, and pesticides if your well is shallow and your area was farmed in the last 50 years. We bring a calibrated test kit on every well consultation.

If your well has iron above 0.3 ppm and any detectable hydrogen sulfide, the first stage of treatment is an air-injection oxidation (AIO) system. The system maintains a pocket of air at the top of a treatment tank. As water passes up through the air pocket, dissolved ferrous iron oxidizes to ferric iron particles and hydrogen sulfide oxidizes to elemental sulfur. The oxidized particles are then trapped in a catalytic media bed (commonly Birm or Katalox Light) below the air pocket. The system backwashes itself on a timed cycle, flushing the trapped particles to a code-compliant drain and refreshing the air pocket. No chemical feed. No compressor. No scheduled chemistry to mix. AIO works for iron up to roughly 10 ppm and hydrogen sulfide up to roughly 5 ppm. Beyond those concentrations, you move to a chemical oxidation stage (chlorine injection or hydrogen peroxide) followed by a contact tank and a backwashing carbon filter. For Central Florida wells the AIO range covers the vast majority of cases.

Florida well water often comes out below pH 6.8. The EPA secondary standard for pH is 6.5 to 8.5. Anything below 6.8 is corrosive to copper plumbing and the anode rod of your water heater. The fix is a calcite neutralizer, a backwashing tank filled with calcium carbonate (limestone) media. Water flowing up through the bed dissolves a tiny amount of calcium carbonate, raising pH and slightly increasing hardness. The bed needs media added every 12 to 18 months as it consumes itself slowly. An acid neutralizer is placed upstream of the softener so the softener sees water in the 7.0 to 7.5 pH range. If you skip this step on a low-pH well, you will replace fittings, water heaters, and (eventually) copper pipes much earlier than the rated life. We test pH on every well consultation and quote a neutralizer when it is needed, not as an upsell when it is not.

Florida Department of Health recommends every private well owner test for bacteria and nitrates annually. Total coliform indicates a pathway for surface contamination into the well. E. coli specifically indicates fecal contamination. Either is a treatment trigger. The standard approach is shock chlorination of the well, then UV disinfection downstream of all other treatment as a continuous safeguard. UV does not remove anything from the water; it inactivates microorganisms by damaging their DNA so they cannot reproduce. UV lamps last 9 to 12 months and the quartz sleeve needs annual cleaning. UV requires clear water to be effective, which is why UV always goes after iron, sulfur, and sediment treatment in the stack. Nitrate is a separate issue, typically from agricultural runoff or septic systems. Nitrate above 10 ppm exceeds the EPA MCL and is removed by reverse osmosis at the point of use or by anion exchange at the point of entry.

A typical Central Florida well-water treatment stack, in order from well pump to fixtures: sediment filter (50 to 5 micron stepwise), acid neutralizer (if pH is low), air-injection iron and sulfur filter, water softener, UV disinfection (if bacteria are present), and an under-sink reverse osmosis system at the kitchen for drinking water. Not every stack has every stage. A well with no iron, no sulfur, and normal pH may only need a softener and an under-sink RO. A well with bad iron and bacteria needs the full stack. We size each stage from the test, not a generic build sheet. Wrong-size sequencing is the most common reason a homeowner ends up unhappy with a well treatment system; right-size sequencing is the difference between a stack that quietly does its job for 15 years and a stack that needs a service call every six months.

Installed pricing in the Central Florida market for 2026 sits in industry-standard ranges: acid neutralizer $1,200 to $2,200; air-injection iron and sulfur filter $1,800 to $3,500; whole-house carbon $1,500 to $3,500; softener $1,800 to $3,800; UV disinfection $700 to $1,500; under-sink RO $400 to $1,200. A full well stack with sediment + neutralizer + AIO + softener + UV + RO is commonly $5,500 to $9,500 installed depending on the home, the plumbing, and the contaminant load. The Florida Department of Health and local county health departments offer guidance on private well systems, and some counties offer subsidized testing through their environmental health programs.

Start with the test. Pure Agua brings a calibrated kit to the well, tests on site, and walks you through what we find. We do not size a stack from a phone call or a photo. For deeper background, our Central Florida hard water guide covers softening in detail, and our reverse osmosis guide covers point-of-use drinking water. Our well water treatment article and the diagnostic article on staining and odor walk through real examples. If you are on a well anywhere in Osceola, Orange, Polk, Lake, Seminole, or Volusia county, we have a local page with the install scope for your area.