http://wonder.cdc.gov/wonder/prevguid/p0000017/p0000017.asp Case Studies in Environmental Medicine: Lead Toxicity 60 micrograms per deciliter – 12 times the current standard http://wonder.cdc.gov/wonder/prevguid/p0000017/p0000017.asp Center for Disease Control's website 60 micrograms per deciliter 60 micrograms per deciliter – 12 times the current standard 60 micrograms per deciliter—12 times the current standard 60 micrograms per deciliter – 12 times the current standard