However, it can also be a cancer-causing contaminant in groundwater when found in high concentrations. Showering, washing dishes and doing laundry can release radon if it is in the water. Bloomington's water contains less than 100 picocuries of radon, or about one-tenth of the EPA's current maximum contaminant limit. The EPA is considering lowering its limit to 300 picocuries. Our radon measurement will still be well below the lower limit.
Some people are more susceptible to contaminants in drinking water than the general population.
These people should seek advice about drinking water from their health care providers.