Including filter system and high-performance Shigella filter.
Shigella is a bacterial contaminant that can enter water supplies through human waste via cross-connections, backflow, or failures in distribution lines. Because only a small exposure can cause illness, homeowners in Marathon take advisories seriously. Even when you’re on a municipal system or a private well or cistern, problems can develop between the treatment point and your tap, especially in coastal settings. Installing whole-house protection gives consistent control of water quality throughout your home so every faucet, shower and appliance receives the same treatment.
Notices about Shigella often follow boil-water advisories, plumbing incidents, or broader contamination alerts, and you can’t rely on taste or sight to detect a bacterial issue. That uncertainty prompts many Marathon families—whether in Key Colony Beach, Grassy Key, or the Sombrero Beach area—to seek a clear defense where water enters the house. Addressing microbial risk at the whole-house level is a practical way to add peace of mind in the Florida Keys’ warm, humid climate.
For Shigella, the most effective single whole-house option is a UV water disinfection system. UV light at the right intensity stops microorganisms from reproducing without adding chemicals, and a whole-house UV unit treats all incoming water so you’re not limited to a single faucet filter. When the unit is sized correctly for your home’s flow rate, it provides strong bacterial protection for every tap.
A UV chamber performs best when water is clear enough for light to penetrate, so many Marathon homes pair UV with prefiltration to reduce sediment and cloudiness that can hide microbes—especially useful for properties using local wells or cisterns. The UV device sits on the main line as the primary barrier against Shigella, and reliable performance depends on correct sizing, steady power, and routine lamp replacement. Mr. Pure Water can help select and install a whole-house UV system suited to your plumbing, moderate water hardness, and the salt-air conditions common in Monroe County.