Reverse Osmosis vs Whole-Home Filter

What Each System Actually Removes

Reverse osmosis (RO) and whole-home filtration solve different problems. Most Tampa homes benefit from both working together, not choosing one over the other.

Reverse Osmosis (Point-of-Use)

An RO system uses a semi-permeable membrane to force water through microscopic pores (0.0001 microns), blocking almost everything except the water molecule itself. Removes:

• Chlorine and chloramine (City of Tampa uses chloramine since 2008)
• Fluoride (not removed by carbon filters)
• Lead, arsenic, mercury
• Nitrates (high in Pasco well water)
• TDS (total dissolved solids), including sodium from water softeners
• Pesticides, herbicides, pharmaceuticals

Installed under the kitchen sink. Provides drinking and cooking water through a dedicated faucet. 3-5 gallons per day output, stored in a small pressure tank.

Whole-Home Filtration

Whole-home filters install at the main water entry and treat all water entering the home. Uses larger-micron filter media (typically 1-20 microns). Removes:

• Chlorine and chloramine (improves shower quality, extends appliance life)
• Sediment, sand, rust particles
• Mild iron (under 0.3 ppm)
• Chlorine-based odor and taste

Does NOT remove dissolved minerals (hardness), fluoride, lead, or pesticides. For that, pair with a softener and RO.

Tampa Water Quality Reality

Tampa city water runs:

• Chloramine: 3-4 ppm
• Total trihalomethanes (TTHM): 45-60 ppb (near EPA limit of 80 ppb)
• Fluoride: 0.7 ppm (added)
• Hardness: 10.8 gpg (City of Tampa 2024 average)
• Total dissolved solids: 300-500 ppm

Pasco and Hillsborough well water varies wildly:

• Hardness: 12-20+ gpg
• Iron: 0.2-3.0 ppm (ranges from minor to heavy)
• Hydrogen sulfide: variable (rotten-egg smell)
• Nitrates: 1-10 ppm (from agricultural runoff)

Cost Comparison

Ideal Tampa Pairing Strategies

Standard Tampa City Water Home

Whole-home Halo 5 ($5,500-$7,500) + under-sink RO ($600-$900). Total: quoted in writing after a FREE water test.

Halo 5 handles chloramine + sediment at every tap. RO provides drinking-quality water at kitchen for cooking, coffee, ice maker.

Pasco/Lutz Well Water Home

Iron filter ($1,200-$2,500) + whole-home softener ($1,699-$2,490) + UV disinfection ($500-$900) + under-sink RO ($900-$1,400). Total: quoted in writing after a FREE water test.

Well water requires more treatment stages. Iron must be removed BEFORE softener (iron fouls softener resin).

Coastal Tampa / South Tampa Home

Whole-home Halo 5 ($5,500-$7,500) + whole-home softener ($1,699-$2,490) + RO with remineralization ($1,200-$1,800). Total: quoted in writing after a FREE water test.

Coastal homes may see brackish infiltration. RO handles any chloride that gets through.

RO Waste Water Factor

Traditional RO systems waste 3-5 gallons of “reject” water for every 1 gallon of purified water produced. For a Tampa household using 3 gallons/day of RO water, that is 9-15 gallons/day of water going down the drain. At Tampa water rates ($0.0065/gallon), that adds $22-$36/year to your water bill.

Modern permeate-pump RO systems (Rheem RHHHERO4, APEC Ultimate) improve the waste ratio to 1:1, cutting waste to 3 gallons/day for the same 3 gallons of drinking water. Worth the $200-$300 upcharge.

Septic System Warning

Homes on septic (Lutz, Odessa, outer Plant City) should use permeate-pump RO to reduce waste-water load on the septic system. Traditional RO dumps 9-15 gallons/day of reject water into the septic tank, accelerating pump-out frequency.