Reverse Osmosis for Well Water in Oviedo, FL

If you’re on a private well in Oviedo, this is the page for you. In short, a reverse osmosis Oviedo well water install works only when it’s paired with a prefilter and a softener ahead of the RO — otherwise the membrane fouls inside 6 months. Oviedo sits on the east edge of Seminole County, about 20 minutes from downtown Orlando.

Moreover, between Lake Jesup to the south, the Econlockhatchee to the east, and UCF to the west, it’s one of the few Orlando-area municipalities where many homes — especially in 32766 (east of Alafaya Trail) and along the old Chuluota corridor — are still on private wells instead of city water.

One thing up front, because it will save you money: installing a standard reverse osmosis system on raw Oviedo well water will destroy the membrane in about 6 months. Specifically, Central Florida well water carries iron, dissolved sulfur, sediment, hardness, and in some shallow wells, bacteria. As a result, an RO membrane is designed to polish already-treated water — not to be the first line of defense against a well.

Furthermore, what you actually need is a 3-stage stack: prefilter → softener → RO. This page walks you through what’s in Oviedo well water, why the 3-stage stack is non-negotiable, what it costs, and how we install it.

We serve all of Oviedo (32765, 32766), plus Chuluota, Winter Springs, Geneva, and east Seminole County.

What’s in Oviedo well water?

Oviedo has two very different water supplies depending on your street:

• City of Oviedo Utilities (west side, most of 32765): Treated municipal water from Floridan Aquifer wells (10 wells feeding the West Mitchell Hammock Water Treatment Facility). Typical hardness 8–10 gpg, TDS 290–330 ppm. For the specific residual disinfectant and most recent test data, see the City of Oviedo’s annual Consumer Confidence Report.
• Private wells (much of 32766, Chuluota, Geneva, rural 32765): Untreated groundwater, typically drawn from the surficial or intermediate aquifer. However, this is where it gets complicated.

Here’s what a typical Oviedo private well test looks like (we run this test free at your home):

• Hardness: 20–30 grains per gallon (very hard — 3–4x OCU water)
• Iron: 0.3–3.0 ppm (EPA secondary limit: 0.3 ppm). Specifically, responsible for orange/red staining on sinks, toilets, laundry.
• Hydrogen sulfide (sulfur): Common. Moreover, produces the “rotten egg” smell, especially in the hot tap.
• TDS: 400–700 ppm (vs 300 ppm city)
• pH: Often 6.5–7.2 (slightly acidic, which corrodes copper plumbing over time)
• Bacteria: Shallow wells (<60 ft) occasionally test positive for coliform. In contrast, deeper wells rarely do, but UV is cheap insurance.
• Sediment: Fine sand and silt, especially after storms or when the pump kicks on hard.

In short, the water may look clear at first, but the moment it sits in a toilet tank you see the orange ring, you smell the sulfur in the morning shower, your water heater element burns out every 3 years, and your espresso machine scales up in 4 months.

Why the 3-stage stack for reverse osmosis Oviedo well water

A reverse osmosis membrane is a precision component. Specifically, it’s an ultra-fine polymer sheet folded around a core, and it expects water that’s already been softened and free of iron/sediment. Feed it raw Oviedo well water and here’s what happens:

1. Iron fouling — iron particles coat the membrane surface, permanently reducing flow. As a result, a $400 membrane is dead in 4–6 months.
2. Scale coating — hardness minerals at 20+ gpg precipitate on the membrane under pressure, same story.
3. Sulfur oxidation — dissolved sulfur oxidizes into sulfate particles on contact with the carbon prefilter, plugging it.
4. Sediment clog — fine sand destroys the pre-filter cartridge in weeks, then the membrane.

Consequently, the 3-stage stack does the work in order:

• Stage 1 — Well prefilter (sediment + iron + sulfur): Air-injection oxidizer or catalytic media tank. Importantly, it removes iron, sulfur, and sediment before they reach anything else. Furthermore, it regenerates automatically.
• Stage 2 — Water softener: Removes hardness (calcium + magnesium) via ion exchange. Moreover, it protects plumbing, appliances, and the RO membrane.
• Stage 3 — Whole-house alkaline RO: Polishes the water. Specifically, it removes remaining dissolved solids, any trace chlorine (if you add disinfection), PFAS, lead, everything. Additionally, the alkaline stage rebalances pH so the water tastes right.

With the 3-stage stack, a whole-house RO membrane lasts 3–5 years. Without it — 4–6 months. In other words, that’s the entire case for sizing well-water treatment as a stack rather than a single unit.

Reverse osmosis Oviedo well water pricing — no quote games

Component	Price installed
Well prefilter (iron/sulfur/sediment tank)	$650 – $950
Water softener	$1,200
Whole-house alkaline RO	$2,950
Full 3-stage well stack	$4,800 – $5,500
UV sterilizer add-on (if bacteria present)	$395

Additionally, we publish our pricing because Oviedo well-water homeowners have told us for years that every quote they’ve gotten from national chains starts at “we need to come out and see” and ends well north of what these systems actually cost. However, that’s not how we do it. You’ll have a written quote 2 business days after we test your well. Annual maintenance plan: $195/year (optional — covers pre-filter swap and membrane flush).

Our 4-step install process (well homes)

1. Free well water test at your home — We run TDS, hardness, iron, pH, sulfide, and (if requested) bacteria on your actual well tap. In addition, we also check your pump pressure and tank condition, since those affect which prefilter we size. As a result, you’ll have your numbers before anyone quotes you.
2. Written quote with your actual water chemistry — One number, itemized. Specifically, we size the stack to your well, not a generic spec sheet.
3. Install scheduled within 7 business days — 6 to 8 hours on-site for a full 3-stage install. Usually done in a day. Moreover, we run drain lines for the softener and prefilter backwash.
4. 30-day follow-up — We re-test post-install, confirm iron and hardness are at zero, adjust the prefilter cycle time if needed.

Service area in and around Oviedo

We serve all of Oviedo (32765 and 32766), plus Chuluota, Winter Springs, Geneva, Slavia, Black Hammock, and rural east Seminole County. In addition, we serve Dr. Phillips, Windermere, Lake Davis / Delaney Park, and Baldwin Park for city-water systems.

FAQ — reverse osmosis Oviedo well water questions

Can I just install a reverse osmosis system directly on my well?

No. Specifically, raw well water will destroy the RO membrane in 4–6 months due to iron fouling, scale, and sediment. Importantly, the membrane is a polishing stage, not a raw-water filter. You need prefilter + softener ahead of the RO. In fact, we’ve seen homeowners waste $1,500 this way — please don’t be one of them.

Why does my Oviedo well water smell like rotten eggs?

That’s hydrogen sulfide — dissolved sulfur gas that occurs naturally in Florida groundwater. Specifically, it’s most noticeable in the hot-water tap because heat releases more of the gas. As a result, a properly sized air-injection or catalytic prefilter oxidizes the sulfide out of the water before it reaches any fixture.

What are the orange/red stains in my toilets and sinks?

Iron. Even 0.5 ppm iron will leave orange stains over a few weeks. Moreover, the EPA secondary limit is 0.3 ppm, but many Oviedo wells run 1–3 ppm. Consequently, an air-injection oxidizer tank removes it without chemicals.

Do I need to test my well water before you come out?

No — we test it for free at your home. Specifically, we bring a portable test kit and run the numbers while you watch. It takes about 20 minutes. However, if you have a recent test from a Florida state-licensed lab, bring it, but it’s not required.

Can I skip the prefilter if my well water looks clear?

Clear water doesn’t mean clean water. For example, iron is fully dissolved below 0.5 ppm and invisible in a glass, but it’ll still stain your toilet and destroy an RO membrane. Similarly, sulfide is a dissolved gas — you can’t see it. As a result, always test before you size a system.

How often do well-water filters need replacing?

With the 3-stage stack: prefilter media is recharged automatically (no replacement for 7–10 years depending on iron load), softener resin lasts 10–15 years, RO pre-filters get replaced annually (10 minutes), and the RO membrane lasts 3–5 years. Additionally, annual service is $195 and covers all filter swaps.

Do I need a UV sterilizer?

Only if your well tests positive for coliform or total bacteria, which is more common in shallow wells (<60 ft) or older casings. Moreover, we’ll tell you during the free water test. A UV unit adds $395 installed and uses about $30 of electricity per year.

Ready for clean water from your Oviedo well?

Call (407) 602-8249 or request a free well water test online. Importantly, we’ll test your actual well, show you the numbers, and recommend only what your water chemistry actually requires. In fact, if you don’t need a full stack, we’ll tell you.