If you've noticed that your tap water has an odd smell — something between chlorine and ammonia — or if you've heard that your water utility switched from chlorine to chloramines and you're not sure what that means for your home, you're in the right place. Chloramines are increasingly common in Florida municipal water supplies, and understanding what they are, why they're used, and how they affect your home is important for anyone on city water.
What Is Chloramine?
Chloramine is a chemical compound formed by combining chlorine with ammonia. Water utilities use it as a disinfectant — the same basic purpose as chlorine — to kill bacteria and other harmful microorganisms in the water supply and keep the water safe as it travels through miles of distribution pipes to reach your home.
There are actually three types of chloramines — monochloramine, dichloramine, and trichloramine — but monochloramine is the form most commonly used in water treatment. When your utility refers to "chloramines" in your water, monochloramine is almost always what they mean.
Why Are Utilities Switching From Chlorine to Chloramines?
For most of the 20th century, chlorine was the standard disinfectant used by water utilities across the country. So why are so many utilities — including many in Florida — switching to chloramines?
The answer comes down to a byproduct problem.
When chlorine reacts with naturally occurring organic matter in water — things like decomposed leaves and other organic compounds common in Florida's water sources — it creates chemical byproducts called trihalomethanes (THMs) and haloacetic acids (HAAs). These byproducts are regulated by the EPA because long-term exposure to high levels has been linked to health concerns.
Chloramines produce significantly lower levels of these regulated byproducts than chlorine does. That's the primary reason utilities make the switch — to stay within EPA limits for disinfection byproducts while still maintaining effective disinfection throughout their distribution system.
Chloramines also last longer in the distribution system than free chlorine, which is important for utilities serving large areas where water travels long distances through pipes before reaching homes.
Where Is Chloramine Used in Florida?
Many of Florida's larger municipal water systems have transitioned to chloramines or use them in combination with chlorine. If you're on city water in the Tampa Bay area, Orlando metro, South Florida, or many other urban and suburban areas of the state, there's a good chance your water contains chloramines.
Your annual Consumer Confidence Report — the water quality report your utility is required to send you — will tell you what disinfectants are used in your water supply. You can also call your utility directly and ask.
How Does Chloramine Affect Your Water at Home?
Chloramines behave differently from chlorine in several important ways that affect how your water looks, smells, tastes, and interacts with your home.
The smell. Chloramine has a distinctive odor that many people describe as a chemical smell, a slight ammonia note, or something different from regular pool-water chlorine. Some people are more sensitive to it than others. If your tap water has an unusual chemical smell that wasn't there before, a utility switch to chloramines could be the reason.
It's harder to remove than chlorine. This is one of the most important things to know about chloramines. Standard activated carbon filters — the kind used in most pitcher filters, refrigerator filters, and basic under-sink units — are effective at removing free chlorine but much less effective at removing chloramines. Chloramines require longer contact time with carbon media or a specific type of carbon to be removed effectively. If you have a basic carbon filter and your utility has switched to chloramines, your filter may not be doing what you think it's doing.
It's more corrosive to plumbing. Chloramine is more corrosive to certain plumbing materials than chlorine. It can degrade rubber gaskets, O-rings, and seals over time — which is why you may notice more frequent leaks or drips at fixture connections in homes with chloraminated water. It can also leach lead and copper from older pipes and solder joints more aggressively than chlorine, which is a concern in homes with older plumbing.
It affects your skin and hair. Like chlorine, chloramine strips natural oils from your skin and hair. Some people find chloramine more irritating than chlorine — particularly those with sensitive skin, eczema, or psoriasis. Bathing and showering in chloraminated water daily can contribute to dry, irritated skin and dry, brittle hair.
It's harmful to fish and reptiles. Chlorine dissipates from water relatively quickly — you can leave a bowl of tap water out for 24 hours and the chlorine will largely off-gas. Chloramine does not. It's stable and persistent. This means aquarium owners and reptile keepers cannot simply let tap water sit to make it safe — chloramine must be actively removed with a dechlorinator that specifically neutralizes chloramines.
It's a concern for dialysis patients. People undergoing kidney dialysis are at risk from chloramine in water used in the dialysis process. Dialysis centers treat their water specifically for this reason, but it's worth noting as an indicator of chloramine's chemical activity.
Does Chloramine Make Your Water Unsafe to Drink?
At the levels used in municipal water treatment, chloramine is considered safe for most people to drink by the EPA and public health authorities. The switch to chloramines is made to reduce other byproducts that pose greater long-term health concerns.
That said, "considered safe at regulated levels" and "ideal for your home" are two different things. The effects on plumbing, skin, hair, appliances, and filtration effectiveness are real considerations that go beyond the basic safety question.
How Is Chloramine Removed From Water?
Because chloramine is more resistant to removal than free chlorine, treating it effectively requires the right approach.
Catalytic carbon filtration. This is the most effective method for removing chloramines. Catalytic carbon is a specially processed form of activated carbon with enhanced surface activity that breaks down chloramines much more effectively than standard carbon. A whole-house catalytic carbon filter installed at the point of entry removes chloramine from all the water in your home — your showers, your drinking water, your appliances — before it reaches any fixture.
Reverse osmosis. An RO system under your kitchen sink is highly effective at removing chloramines from drinking and cooking water. However, it only treats water at that one point of use — it does nothing for your shower water or your appliances.
Vitamin C filtration. Ascorbic acid (vitamin C) neutralizes both chlorine and chloramine effectively. Vitamin C shower filters are available and can help reduce skin and hair irritation from chloraminated shower water. They're not a whole-house solution, but they can be a useful addition.
Standard carbon alone is not enough. This bears repeating — if your utility uses chloramines and you're relying on a standard pitcher filter, refrigerator filter, or basic carbon block filter, you are likely not removing the chloramine effectively. Check whether your filter is specifically rated for chloramine removal.
The Whole-House Approach
For Florida homeowners on municipal water, the most comprehensive solution is a whole-house catalytic carbon filter installed at the point of entry. This removes chloramines from every drop of water that enters your home — protecting your plumbing from corrosion, your skin and hair from daily chemical exposure, and your appliances from chloramine's degrading effects on rubber seals and components.
In most Florida homes, a whole-house carbon filter works best as part of a complete treatment system that also includes a water softener to address hardness. The softener handles calcium and magnesium; the carbon filter handles chloramines and other chemical contaminants. Together they address the two most significant water quality issues facing Florida municipal water users.
How to Find Out if Your Water Contains Chloramines
The simplest way is to check your annual water quality report (Consumer Confidence Report), which your utility is required to provide. You can also call your utility's customer service line and ask directly what disinfectant they use.
A professional water test will also confirm the presence of chloramines and measure the concentration in your water, giving you the information you need to choose the right treatment approach.
The Bottom Line
Chloramines are in a growing number of Florida municipal water supplies, and most homeowners don't know it. They're there for a legitimate public health reason — but they come with real effects on your plumbing, your skin and hair, your filtration effectiveness, and your home's rubber components.
The good news is that chloramines are effectively treatable with the right system. Knowing what's in your water is the first step — and if chloramines are present, a whole-house catalytic carbon filter is the most effective way to address them throughout your entire home.
Not sure whether your Florida water contains chloramines? Dependable Water Treatment can test your water and recommend the right treatment to remove chloramines and other contaminants throughout your home. Contact us to get started.