Cotinine in Florida Water

Unhealthy Levels of Cotinine in the Water Supply of Florida Homes

Cotinine is a breakdown product of nicotine that can show up in water when tobacco-related residues make their way into wastewater and then into the broader water cycle. While it’s more commonly discussed in health testing, it can also be used as a marker of tobacco exposure in the environment. Homeowners may become concerned when they hear it mentioned in water reports or learn it can be present at trace levels in treated water. If you want greater confidence in what’s coming from every tap, it helps to understand how cotinine behaves in water.

Cotinine is typically present at very low concentrations and it doesn’t always change the taste, smell, or appearance of your water. Because it’s dissolved, it can pass through basic sediment filters that only catch dirt and rust. It may also be missed by simple pitcher-style filters that aren’t built for persistent, low-level organic compounds. For families looking to reduce unwanted trace contaminants broadly, a whole-house approach can be a practical next step.