Know what is in your water
Orlando water quality, in plain English.
Orlando's tap water comes from deep underground, travels through miles of pipe, and picks up a little of everything along the way. Here is what is actually in it, what the official reports say, and what they cannot tell you about your own home. Every source is linked so you can check the claims yourself.
Where Orlando's water comes from.
Orlando's water utility, the Orlando Utilities Commission (OUC), draws from the Lower Floridan Aquifer — deep wells drilled hundreds of feet down through Florida limestone. That limestone is the reason for the first item on our list.
Hardness minerals: calcium and magnesium.
Limestone dissolves into the groundwater as calcium and magnesium — the minerals behind "hard" water. OUC reports its system average hardness at 129 ppm, about 7 grains per gallon — solidly in the hard range. Hardness does not violate any drinking-water standard, but it causes the visible problems: scale on fixtures, soap scum in showers, spots on dishes, and shorter appliance life. A regional USGS-based estimate sometimes quoted for Orange County is 68 mg/L (about 4 gpg) — that is a regional estimate, not an OUC or individual-home measurement, so do not treat it as your home's number.
Chlorine: required by law.
OUC is legally required to disinfect its water, and it uses sodium hypochlorite (chlorine). Disinfection keeps water microbiologically safe as it travels through the distribution system. OUC's 2025 Water Quality Report shows chlorine averaging 1.2 ppm across the year (range 0.2–2.2 ppm), against a federal limit (MRDL) of 4 ppm — no violation. But many people can smell and taste chlorine well below the legal limit, and warm water makes the smell stronger.
Disinfection byproducts: TTHMs, HAA5, and HAA9.
When chlorine does its job, it reacts with natural organic matter and forms disinfection byproducts — trihalomethanes (TTHMs) and haloacetic acids (HAA5, and the broader HAA9 group). These are regulated: they have enforceable federal limits (MCLs), and OUC reports its results in the annual water quality report. The Environmental Working Group publishes its own stricter health guidelines for these compounds — worth knowing, but guidelines are not legal limits, and OUC's water meets the standards that are.
Sediment.
Fine sand and silt can show up as cloudiness or grit, wear out fixture cartridges and appliance valves, and shorten filter life. A whole-home sediment pre-filter is the simple fix.
Sulfur taste and odor.
Hydrogen sulfide gives water a rotten-egg smell — more common in well water, but it shows up on city water too. OUC uses ozone treatment in part to oxidize sulfur compounds. At home, carbon filtration or dedicated treatment handles the smell.
Tannins and color.
Decaying plant matter in Florida's shallow water table can tint water yellowish or tea-colored — mostly an aesthetic issue, and common in private wells. Treatment options depend on what the free water test finds.
Lead: the risk is your plumbing, not OUC's water.
OUC states its water is lead-free and that its system contains no lead service lines. Lead shows up when water sits in older customer plumbing — lead solder, brass fixtures, or old pipes after the meter. Homes built before 1986 are the ones to check, and the only way to know is to test at the tap.
Legal limits vs. health guidelines.
This distinction matters: legal limits (MCLs, MRDLs) are enforceable standards your utility must meet — and OUC states it meets all EPA and Florida DEP requirements. Health guidelines — like the EPA's non-enforceable goals (MCLGs) or the EWG's published guidelines — are advisory targets, often set much lower. They are useful context, not violations.
System reports describe the system. Your home is its own story.
The annual water quality report is an average across the whole utility. It cannot tell you what your pipes, fixtures, and water heater are doing to your water. That is exactly what the free in-home water test is for — we test your water at your tap, show you the results on the spot, and recommend equipment sized for your home.
Check the sources yourself.
Everything above traces back to these public sources:
OUC 2025 Water Quality Report
Orlando Utilities Commission’s official annual report — source, treatment, and test results for 2025.
EWG: Orlando Utilities Commission
Environmental Working Group’s tap-water page for OUC, with its own stricter health guidelines (not legal limits).
MyTapWater: OUC
Regional water data for OUC’s service area in Orange County.
Florida DEP Water Resource Management
The state agency that regulates Florida’s drinking-water systems.
EPA: Safe Drinking Water Act
The federal law behind the standards your utility must meet.