Marietta officials report that a recent spike in Methyl-Isoborneol (MIB) in local water sources is behind the unusual taste or smell some residents have noticed in their tap water. The compound occurs naturally and does not pose any health risk, according to the city’s statement.
The recent earthy taste and smell in Marietta’s tap water can be traced to elevated levels of Methyl-Isoborneol (MIB) in the Chattahoochee River and Allatoona Lake, the city’s main water sources. According to officials, the rise in MIB is a seasonal occurrence driven by shifting temperatures and water levels, though this year’s levels are unusually high. The Cobb County–Marietta Water Authority has intensified treatment efforts, but the compound is proving difficult to remove. Despite the lingering effects on taste and odor, authorities emphasize that the fluctuations are natural and pose no health risks.
Residents are reassured that the tap water remains safe to drink and is being closely monitored. For those bothered by the taste or odor, officials suggest using a carbon filter or chilling the water in the fridge, as cooler temperatures can help reduce the noticeable MIB flavor, as mentioned on Marietta's website.
For more information about MIB, residents can contact Marietta Water at 770-794-5230 or visit their information page online. While this seasonal change may affect the taste and smell of tap water, officials stress that it remains safe to drink, simply carrying a natural compound that’s making its presence known.
