All water has its own unique taste and odor characteristics. The City of Marshall, like many other water suppliers, occasionally experiences changes in taste and odor.
Algae and bacteria naturally found in surface waters can produce different types of tastes and odors. Geosim and 2-Methylisoborneol (MIB) have been identified as odor-causing compounds and are detectable at levels as low as five parts per trillion (ppt or nanograms per liter). When conditions are favorable, the bacteria and certain blue-green algae produce a musty or earthy taste and odor.
Although these contaminants impact an unpleasant taste and odor, they do not have an established Maximum Contaminant Level (MCL) nor pose any known health risk.