UV Light & Chemical Treatment Options

Worried About Bacteria in Your Family’s Water? Let’s Make It Safe.

UV Disinfection & Chlorination by a Licensed New York Well Specialist

Few things worry a parent more than not knowing if the water their kids are drinking, cooking with, and bathing in is truly clean. If your well has tested positive for coliform, E. coli, or other bacteria – or you just want peace of mind – the good news is this is a solved problem. We make well water safe for your whole family, every single day.

There are two proven ways to do it: ultraviolet (UV) water disinfection or chlorination (chemical feed). They are not interchangeable, and the right one depends on what is actually in your water – so installing the wrong system is one of the most common mistakes we see on private wells. We make sure that doesn’t happen to your home.

At Kappus Well Pump & Water System Services, we don’t sell one-size-fits-all disinfection. We test your water first, find exactly what’s there, and match the system to your results – so your water is genuinely safe, not just “treated.” We’re NYS DEC certified (License #NYRD10652) and have protected private wells for families across Putnam, Dutchess, Westchester, Orange, and Rockland counties for generations.

Below we break down when UV is the right call, when chlorination is the better tool, what pre-treatment your water needs first, and how testing and New York real-estate compliance work – so you can make your family’s water safe with confidence.

Make Sure Your Well Water Is Safe to Drink

We test first, then install the right UV or chlorination system to kill the bacteria in your water. Honest, upfront pricing every time.

Request an Estimate →

Or call 845-528-2929

Disinfection Done Right Starts With a Test – Not a Guess

Bacteria in well water can’t be seen, smelled, or tasted. The only way to know what’s there – and what will actually fix it – is a proper water test. Once we know what’s in your water, we have two reliable tools to make it safe:

UV (ultraviolet) disinfection – light that neutralizes 99.99% of bacteria, viruses, and cysts as the water flows through. No chemicals, no change to taste.
Chlorination (chemical feed) – injects a measured dose of chlorine and holds it in a contact tank to fully disinfect. Also tackles iron bacteria, sulfur, and gives lasting protection in storage tanks and long pipe runs.

Most clean, clear wells do beautifully on a UV system. But UV only works on water that’s already clear – and some problems, like iron bacteria, sulfur, or cloudy water, call for chlorination instead. We match the tool to your water, and we’ll tell you honestly which one your well needs. Start with our water testing services.

When We Recommend a UV System

UV is usually the best choice for a clean, clear well that simply needs reliable protection against bacteria. We install NSF/ANSI 55 Class A systems – the standard rated for private wells, delivering a 40 mJ/cm2 dose with a built-in sensor and fail-safe alarm so you know the moment it isn’t treating properly. UV is the right call when:

Your test shows coliform, E. coli, or other harmful bacteria
Your water is clear – no heavy iron, sediment, or cloudiness shielding the bugs from the light
You want chemical-free treatment with no change to taste or smell
You need protection against chlorine-resistant cysts like Cryptosporidium and Giardia
You’re concerned about surface-water intrusion, or you have guests or tenants to protect
You want continuous, around-the-clock disinfection every time the water runs

When Chlorination Is the Better Tool

UV can’t do everything. When your water isn’t clear, or the problem is more than just bacteria, a chemical feed (chlorination) system is the stronger, more honest fix. We recommend chlorination when:

Iron bacteria or biofilm is present – the slimy buildup that clogs filters and shelters coliform. An iron filter alone won’t kill it; chlorination breaks it down.
You have sulfur odor (rotten-egg smell) or staining iron and manganese that chlorine oxidizes on the way through
Your water is cloudy or turbid – sediment that would shield bacteria from UV light is no problem for chlorine
You need residual protection in a storage tank or long pipe runs, where chlorine keeps working downstream
Bacteria counts are high or contamination is ongoing and needs heavier, retention-tank disinfection

A continuous chlorination setup injects a measured dose, holds it in a contact tank for full kill time, and we typically follow it with a carbon filter to polish out any chlorine taste. Need a one-time fix after well work or a failed test? We also perform shock chlorination to disinfect the entire well and system.

Why Clean Water Has to Come First

Here’s what most companies won’t tell you: a UV light only disinfects water that’s already clear. Iron, sediment, hardness, or cloudiness create shadows where bacteria ride right through untouched. Drop a UV system onto dirty water and you get a false sense of safety.

That’s why we build a complete, properly ordered system – not just a bulb on the line. Depending on your water, that can mean:

Sediment and cartridge pre-filters to clear the water for the UV light
Iron filters or softeners ahead of disinfection so nothing shields the bacteria
A chlorinator and contact tank where the bacterial load calls for it
A carbon filter to polish taste, followed by UV as the final barrier

Done in the right order, this multi-barrier approach is the most reliable protection a private well can have.

Testing & New York Compliance

We can perform basic onsite screening and recommend further testing where needed. In-house, we test for:

Hardness, iron, and manganese
pH and TDS (total dissolved solids)
Tannins

Bacteria (coliform, E. coli), VOCs, PFAS/PFOA, and other chemical contaminants must be analyzed by a state-certified lab. A service call isn’t always required – you can often drop your own sample at a NYS-certified lab, such as YML Labs in Yorktown Heights, NY.

Buying or selling a home? Many New York towns require a passing bacteria test for a real-estate transfer, and some Board of Health offices require disinfection before closing. We’ll test, install the right system, and get your water compliant.

UV Light & Chemical Treatment – Frequently Asked Questions

Do I need a UV system or chlorination for my well?

It depends on what’s in your water. UV is usually best for a clean, clear well that needs bacteria protection, while chlorination is the better tool when you also have iron bacteria, sulfur, cloudy water, or need lasting residual protection in a storage tank. We test first, then recommend the right one – never a one-size-fits-all package.

Will a UV light make my well water safe to drink?

Yes, when it’s the right system on the right water. We install NSF/ANSI 55 Class A units, which are rated to disinfect private well water and include a sensor and fail-safe alarm. UV only works on clear water, though, so we test first and add any pre-filtration your water needs before the light.

Does UV remove iron, sulfur, or hard water?

No. UV only neutralizes living organisms like bacteria and viruses. It does not remove iron, manganese, sulfur odor, hardness, or sediment. Those issues are handled by filters and softeners installed ahead of the UV, which also keeps the water clear so the UV can do its job.

How often does a UV system need maintenance?

A UV system needs an annual lamp replacement and periodic cleaning of the quartz sleeve. The lamp weakens over a year even though it still glows, so it must be changed on schedule. Our Class A systems include an alarm that alerts you if the unit ever stops treating properly.

Do you offer well shock chlorination or a one-time disinfection?

Yes. Shock chlorination is a one-time, high-dose treatment that disinfects the entire well and plumbing, which is useful after well work, flooding, or a failed bacteria test. If contamination keeps returning, we’ll recommend a continuous system, either UV or a chlorinator with a contact tank, for long-term protection.

Can you test my well for bacteria, and do I need a certified lab?

We perform onsite screening for things like hardness, iron, pH, and TDS, but bacteria such as coliform and E. coli must be analyzed by a state-certified lab. We can collect and submit the sample, or you can drop your own at a certified lab. For a home sale, many New York towns require a passing bacteria test before closing.

Make Sure Your Well Water Is Safe to Drink

We test first, then install the right UV or chlorination system to kill the bacteria in your water. Honest, upfront pricing every time.

Request an Estimate →

Or call 845-528-2929