Geosmin and MIB
Geosmin and Methylisoborneol (MIB) are naturally occurring compounds that have an earthy taste and odour. Human noses and tastebuds can detect Geosmin and MIB at very low concentrations.
We routinely monitor for Geosmin and MIB in the water supply. These compounds are sometimes present in drinking water, but not usually at noticeable levels. Seasonal increases in naturally occurring algae or bacteria in water sources can cause a rise in Geosmin and/or MIB above the taste and odour threshold.