EPA Issues Interim Drinking Water Health Advisory for Perchlorate
"On October 10, 2008, the Agency issued a preliminary determination for perchlorate in the Federal Register for public review and comment (USEPA, 2008a). The notice described the Agency’s preliminary decision that there is not a "meaningful opportunity for health risk reduction" through a national drinking water regulation. Based on the comments that it received, EPA believes that it would benefit once again from NRC input regarding perchlorate, this time in the context of the application of the physiologicallybased pharmacokinetic (PBPK) modeling and assumptions regarding sensitive populations in development of the interim HA level. Thus in 2009, EPA will engage the NRC to provide additional advice.

The Agency is issuing this interim health advisory to assist state and local officials in advance of a final regulatory determination. EPA expects to issue a final health advisory concurrent with the final regulatory determination for perchlorate."