Chlorine vs. Chloramine in Florida Water: Why It Changes What You Buy
If a filter salesperson never asked which disinfectant your utility uses, they sold you a guess. Standard carbon strips chlorine easily and struggles badly with chloramine — and several Central Florida utilities use chloramine year-round.
Published June 2, 2026 · Shield Water Solutions
The chemistry, briefly
Free chlorine is a fast, aggressive disinfectant that dissipates quickly. Chloramine is chlorine bonded to ammonia: weaker but far more stable, so it survives long trips through distribution networks.
Utilities increasingly favor chloramine because it produces fewer regulated disinfection byproducts and maintains residual out to the ends of the system.
Why chloramine is harder to filter
Standard granular activated carbon adsorbs free chlorine within seconds of contact. Chloramine's bond has to be catalytically broken, not just adsorbed, which requires catalytic carbon and substantially longer contact time.
Practically that means a larger media bed. An undersized tank that handled chlorine fine will pass chloramine straight through — the classic symptom is a new filter that did not fix the smell.
What it does in your house
Both cause taste and odor complaints and both dry out skin and hair. Chloramine is additionally corrosive to rubber plumbing components — it is a known cause of premature failure in toilet flappers, washer hoses, and older gaskets.
Chloramine is also lethal to fish and must be removed before aquarium use; a dechlorinator formulated for chlorine alone will not do it.
How to find out which you have
Your utility's annual Consumer Confidence Report states the disinfectant. A simpler tell: fill a glass and let it sit an hour. If the smell fades noticeably it is likely free chlorine; if it persists, suspect chloramine.
Shield tests for both during a free on-site assessment and sizes the carbon bed to whichever your address actually receives — including systems that switch seasonally.
Frequently asked
Is chloramine dangerous?+
At regulated levels it is not considered a health hazard for drinking. The practical issues are taste, odor, skin and eye irritation, corrosion of rubber plumbing parts, and toxicity to fish.
Will a standard carbon filter remove chloramine?+
Not reliably. Chloramine requires catalytic carbon and longer contact time — meaning a properly sized whole-house tank rather than a small cartridge.
Do Central Florida utilities use chloramine?+
Several do, and some switch between chloramine and free chlorine seasonally. Check your Consumer Confidence Report or have your water tested before buying equipment.
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