If high levels are discovered as well as the residence has an exclusive well, call the Safe Drinking Water Hotline at for information on screening your water. You will decrease your risk of lung cancer when you reduce levels, even if you have actually coped with an elevated radon level for a very long time. The state's radon in water MEG degree of 4,000 pCi/l is based upon the cost of a mitigation system and factor to consider of the wellness risk decrease it will supply to the passengers of the house. This is likewise true concerning the state's radon in air action degree of 4 pCi/l.