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Services · Well water · UV
UV water treatment for private wells
A UV system is a lamp that kills germs in your well water as it flows into the house. Nothing is added and nothing about the taste changes. It does that one job, so it only belongs on your system when a lab test says your well needs it. Here's how it works, what it has to be paired with, and what it costs to keep running.
What it killsBacteria & virusesAs water passes the lamp
Added to your waterNothingNo chemicals, no taste change
Where it goesLast in lineAfter every other filter
UpkeepOne lamp a yearPlus a yearly lab test
The short versionUV disinfection
- What it is
- A steel tube with an ultraviolet lamp inside, on the main water line. Water flows past the light for a few seconds on its way into the house.
- What it fixes
- Bacteria, including coliform and E. coli, and viruses. The light damages their DNA so they can't multiply or make you sick.
- What it doesn't do
- Remove iron, the rotten-egg smell, hardness, nitrate, lead, PFAS or any chemical. It doesn't protect the pipes after it, and it doesn't work without power.
- Who needs it
- Private wells where a lab test finds bacteria, especially if it comes back after the well is disinfected, or wells that flood.
- Who doesn't
- Homes on city or county water, which is already disinfected and tested. And most wells with clean lab tests. It's optional there, and we'll say so.
- Works best with
- Whatever makes the water clear first: a sand filter, an iron and sulfur filter, a softener. UV always goes last. Why the order matters
- Upkeep
- A new lamp once a year, a wipe of the glass sleeve at the same visit, and a yearly lab test for bacteria.
- Price
- Priced on your well quote, installed as part of your well system. The yearly lamp: listed on your quote.
How it works, in plain words.
City water stays safe because the utility adds chlorine, which keeps working all the way to your tap. A private well has nothing like that. UV is the chemical-free way to do the same job.
- A lamp in a glass sleeveThe lamp sits inside a clear quartz tube, so it never touches the water. Water flows around it through a steel chamber.
- A few seconds of lightThe ultraviolet light damages the DNA of bacteria and viruses. They can't multiply, so they can't make you sick. Nothing is added to the water and nothing is left behind.
- Sized to your home's flowUV systems are rated in gallons per minute. The unit is matched to how fast water moves through the house, so no water rushes past faster than the light can treat it. About 10 gallons a minute covers most homes.
- Lamp-life remindersMost whole-home UV systems show how much lamp life is left and alert you when it needs attention, so you're not relying on a lamp that's quietly worn out.
What it pairs with, and why UV goes last.
UV only works if the light can reach every germ. Cloudy water, iron, sulfur and hard-water scale on the glass sleeve all block it, and germs can hide in the shadow of a grain of sand. So everything that clears the water goes first, and the UV goes last, on clean water.
- Your wellWater comes up from the aquifer.
- Sand filterCatches grit and sand that would cast shadows.
- Iron & sulfur filterTakes out stains and smell. Iron also tints the water and blocks the light.
- SoftenerTakes out hardness, so scale can't coat the UV glass.
- UV lampLast, on clear water, so the light reaches every germ.
- Your tapsEvery faucet, shower and the fridge.
Only the steps your test calls for. Plenty of wells skip one or two. Our free well test reads iron and hardness on the spot, so we know whether your water is clear enough for UV as it is or needs a filter in front of it. As a rule of thumb, iron needs to be under 0.3 ppm, the same level where orange stains start.
Who needs it, and who doesn't.
We'd rather lose a sale than sell you something your water doesn't need.
- A lab test found bacteriaDisinfect the well first and retest, as the Florida Department of Health recommends. If bacteria comes back, UV is the long-term fix.
- Your well floods, or sits near a septic systemBacteria can get in again after heavy rain. UV treats the water every day, not just after a test.
- On a clean well, for peace of mindOptional. Some families with a baby, an older parent or a weak immune system choose it anyway. We'll price it if you ask, and we won't push it.
- On city or county water: usually notYour utility disinfects and tests the water. The one exception people ask about: a whole-house carbon filter takes the disinfectant out, so some add UV after it. It's a choice, not a need.
The price, and the cost to run it.
UV is never sold on its own here. It goes on the end of a well system built from your test, so it's priced on the same flat written quote, with the yearly lamp listed beside it.
UV, added to your well system
Priced on your well quoteflat, installed
- Sized for your home's water flow
- Lamp-life display and alerts, standard on most whole-home units
- Started up to the manufacturer's instructions
- A follow-up lab test is recommended once it's running
The lamp
Listed on your quotea year
- One new lamp a year, about 9,000 hours
- A wipe of the glass sleeve at the same visit
- Your yearly lab test for bacteria
UV questions.
Do I need UV on city or county water?
Usually not. Your utility disinfects the water, tests it for bacteria, and keeps a little chlorine or chloramine in it all the way to your tap. One honest wrinkle: a whole-house carbon filter takes that disinfectant out, so water sitting in your pipes and water heater no longer carries any. Some people add UV after a carbon filter for that reason. It's a choice, not a need, and we won't tell you otherwise.
My lab test found coliform bacteria. Do I need UV?
Not right away. The Florida Department of Health's first step is to disinfect the well and plumbing with chlorine (shock chlorination) and test again. If bacteria comes back, UF/IFAS Extension says it's time for continuous disinfection such as UV. Either way, find the cause too: a loose well cap, a cracked casing or a septic system nearby. A licensed well contractor checks those.
Will UV fix a rotten-egg smell or orange stains?
No. UV only deals with germs. The smell is hydrogen sulfide and the stains are iron, and both need their own filter. They also have to come out before the UV, because they block the light.
Does UV change the taste or add anything to my water?
No. Nothing is added, and the taste, smell and pressure stay the same. The water just passes a lamp for a few seconds.
Does UV protect my pipes after it?
No. It only treats water while it's inside the chamber, and nothing stays in the water afterwards. That's why the industry recommends disinfecting the plumbing once when UV is first installed, and why a yearly lab test still matters.
How often does the lamp need changing?
Once a year, about 9,000 hours of running. A worn lamp still glows but puts out too little UV to do the job, so you can't tell by looking. Most units count down the days and alert you when it's due.
What happens when the power goes out?
The lamp goes off, and so does your well pump. When power comes back, the lamp needs a few minutes to warm up, so run a cold tap for a minute before drinking. If the house sat empty for days, flush the taps first.
How do I know a UV system is any good?
Look for certification to NSF/ANSI Standard 55, Class A, which is the standard for systems meant to disinfect water. Also look for an alarm that sounds when the lamp fails, not just a light. It's a fair question to ask any installer, us included.
By Safer Water Co., Bradenton · Last checked October 2026 against the sources below
Sources
- UF/IFAS Extension: Private Wells 101, Bacterial Contamination and Shock Chlorination
- Florida Department of Health: Well Water Facts, Disinfection
- Florida Department of Health: Private Well Water Testing
- University of Georgia Extension: Water Disinfection Methods and Devices (B1487)
- Virginia Cooperative Extension: Household Water Treatment (442-670)
- EPA: Secondary Drinking Water Standards (iron, 0.3 mg/L)
Start with a free test. Then one flat price, in writing.
If your well needs UV, it goes on the quote with everything in front of it and the yearly lamp cost beside it. If it doesn't, we'll tell you.
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