Local Water Quality
Reverse Osmosis in Orlando, FL: The Case for Under-Sink Filtration in Central Florida
If you've ever noticed a chalky film on your glassware, an oddly chemical aftertaste in your morning coffee, or white deposits caking your ice maker, you're experiencing what Orlando residents have been dealing with for decades: water drawn from deep limestone aquifers, treated with chloramines, and piped through miles of aging municipal infrastructure before it reaches your faucet.
The City of Orlando sources most of its drinking water from the Floridan aquifer system — one of the most productive aquifer systems in the world, but one that dissolves calcium and magnesium from surrounding limestone as it flows. By the time Orlando tap water reaches most homes, total dissolved solids (TDS) typically run between 300–500 mg/L and water hardness measures 12–18 grains per gallon (GPG). That's firmly in the "very hard" range — roughly twice the national average.
The Chloramine Problem
Orlando Utilities Commission (OUC) and Orange County Utilities both switched from free chlorine to chloramine disinfection years ago. Chloramines are a more stable disinfectant for long distribution runs — helpful for a sprawling metro like Greater Orlando — but they create different byproducts than chlorine and are more resistant to removal. Chloramines can't be removed by simple carbon filters or by leaving water out overnight. They require either a catalytic carbon system, a KDF media filter, or a reverse osmosis membrane.
They also react with certain older pipe materials to leach lead and copper at higher rates than free chlorine. In the historic neighborhoods of downtown Orlando, Winter Park, and College Park — where homes built before 1986 may still have lead solder joints — this matters. The EPA's action level for lead is 15 parts per billion, but no level of lead exposure has been deemed safe for children.
What Reverse Osmosis Actually Does
A reverse osmosis (RO) system forces pressurized water across a semi-permeable membrane with pores small enough to block molecules far smaller than bacteria — we're talking about ions at the 0.0001-micron scale. What comes out the other side is water that's had 95–99% of dissolved solids removed, including:
- Hardness minerals (calcium, magnesium)
- Chloramines and chlorine byproducts
- Nitrates (a concern in areas near Orlando's agricultural fringes)
- Lead, copper, and other heavy metals
- PFAS "forever chemicals" — detected at trace levels in many Central Florida groundwater sources
- Pharmaceuticals and personal care product residues
The result is water that tastes genuinely clean — not just "less bad." Many Orlando residents describe RO water as tasting almost like high-quality bottled water. That's because it essentially is, except it comes from your own tap at a fraction of the cost and environmental footprint of purchasing plastic bottles.
The Compounding Problem of Hard Water + Chloramines
Orlando's water has a compounding issue that makes RO more valuable than in softer-water cities. The combination of high hardness and chloramine disinfection accelerates scale buildup in appliances while also making that scale harder to remove. Scale forms faster at high mineral concentrations, and chloramine residuals can't be cooked off by boiling the way free chlorine can.
This means your coffee maker, ice maker, and dishwasher face a one-two punch: constant mineral deposits that progressively reduce efficiency and a disinfectant residual that simple pitcher filters (like Brita's standard carbon models) won't fully remove. Point-of-use RO at the kitchen sink solves both problems for drinking and cooking water simultaneously.
What to Expect from an Under-Sink RO System in Orlando
Most residential RO systems in Orlando are installed under the kitchen sink and include a small storage tank (usually 2–4 gallons) plus a dedicated faucet. The system runs silently, filtering water on demand and topping off the tank between uses. A full installation typically takes a few hours and requires no plumbing modifications beyond connecting to the cold water supply line and drain.
Modern RO systems for Florida homes include at minimum:
- A sediment pre-filter to remove any particulates (Orlando's distribution system occasionally introduces sediment after pipe repairs)
- A catalytic carbon pre-filter specifically designed to remove chloramines (standard carbon is not adequate)
- The RO membrane itself — the primary filtration stage
- A post-carbon polishing filter to improve taste and remove any residual organics from the storage tank
Some systems add a remineralization stage after the membrane to add back a small amount of calcium and magnesium — which improves taste and adds alkalinity. For Orlando water, this is a nice feature but not a necessity.
Whole-House vs. Point-of-Use
A common question: should you filter all the water in your Orlando home, or just the drinking water? Whole-house RO systems exist but are expensive, waste more water (RO systems produce some reject water), and most homeowners don't need RO-quality water for showering, laundry, and outdoor use. The more practical approach for most Orlando households is a point-of-use RO at the kitchen sink paired with a whole-house softener or TAC conditioner for appliance and fixture protection.
This dual approach — softener for scale prevention throughout the home, RO for drinking and cooking at the kitchen — is what we find works best for most Central Florida households. It addresses both the infrastructure damage caused by hard water and the health/taste concerns with chloramines and trace contaminants in the drinking supply.
Orlando's Growing PFAS Concern
Per- and polyfluoroalkyl substances (PFAS) — often called "forever chemicals" — have been detected at trace levels in Florida groundwater sources, including those feeding Central Florida utilities. While Orlando's utilities maintain compliance with current EPA PFAS limits, those limits themselves were dramatically tightened in 2024, and the science on safe exposure levels continues to evolve. RO is one of the few residential technologies proven to remove PFAS compounds reliably — typically achieving 90–95% removal rates.
For families with young children, pregnant women, or immunocompromised individuals in Orlando, RO filtration provides a meaningful additional layer of protection beyond municipal treatment.
Is Reverse Osmosis Right for Every Orlando Home?
Not every household has the same filtration needs. Renters in newer Orlando apartment complexes may find that a high-quality countertop or faucet-mount filter meets their needs. Homeowners who already have a whole-house softener may need only a dedicated drinking water filter rather than full RO. And those drawing from private wells in eastern Orange County or rural Osceola County face a different set of challenges — including bacterial contamination, iron, and hydrogen sulfide — that require a more comprehensive treatment strategy.
The right approach for your Orlando home depends on a water test that tells you exactly what's in your water. The H2O Heroes team serves the Greater Orlando area and can assess your specific situation — whether you're in a newer subdivision in Lake Nona, a historic bungalow near Mills 50, or an acreage property near Christmas. We'll help you find the right filtration approach for your water, your home, and your family.
Orlando water is safe to drink as it comes from the tap. But "safe" and "optimal" are different standards, and many families in Central Florida have decided they want the latter. Reverse osmosis delivers it.