1,4-Dichlorobenzene in Key Largo Florida Water

Unhealthy Levels of 1,4-Dichlorobenzene in the Water Supply of Key Largo Florida Homes

1,4-Dichlorobenzene is a synthetic chemical that can appear in drinking water and become a concern when concentrations are elevated. Also called p-Dichlorobenzene, many residents recognize it by a sharp, mothball-like smell more than by name. Because it can affect both odor and overall water quality, homeowners in Key Largo often prefer to address it where water enters the house—especially given our coastal humidity and salt air that can make plumbing odors more noticeable. Treating water at the point of entry limits exposure during everyday uses like showering, laundry, and dishwashing across your whole home.

This compound has been used in products such as deodorants and moth repellents, and it can get into water through industrial handling, disposal, or contaminated runoff and groundwater. It may persist because it does not break down quickly under typical conditions, so even clear water can carry that distinct odor—especially in hot showers or when multiple taps are running. In the Florida Keys, where many homes use storage tanks or treatment systems because of limited freshwater supply, testing is the best way to confirm whether 1,4-Dichlorobenzene (p-Dichlorobenzene) is present and to choose the right treatment for your property.