Blue-Green Algae (Cyanobacteria) in Key West Florida Water

Unhealthy Levels of Blue-Green Algae (Cyanobacteria) in the Water Supply of Key West Florida Homes

In Key West and the surrounding Florida Keys, blue-green algae—also known as cyanobacteria—can appear in water when conditions encourage growth. Homeowners might notice a musty or earthy smell, an odd taste, or occasional discoloration that makes tap water less pleasant. While blooms are often talked about in ponds and coastal waters, the real question for your household is whether algae cells or their byproducts are getting into the water you use daily. If you suspect an issue in your Key West home, the first step is identifying likely sources and selecting a treatment that targets the particles involved.

Not every change in water quality around Key West means cyanobacteria are present—algae issues are frequently mistaken for sediment, organic debris, or a bland, “stale” taste. Algal material can be intermittent, shifting with source water conditions or after storms and heavy rains that affect local supplies. Because you use tap water for cooking, bathing, and brushing teeth, consistent quality matters as much as flavor. Installing a whole-house solution protects every fixture—from showers in Old Town to kitchen sinks in Casa Marina—so the whole home benefits, not just a single tap.