It is not certified to reduce lead. You can look it up on NSF.org (http://info.nsf.org/Certified/dwtu/listings.asp?CompanyName=kaz&submit1=Search+by+Manufacturer&Program=DWTU). No pour-through model is certified for lead reduction. This is false advertising (a few faucet models can do it but it has nothing to do with this particular model).
CRF-950Z filter for model CR-4000, CR-6000, CR-6000C, CR-1100C, and DS-1800Z
ANSI 53 certified for
Carbon Tetrachloride Reduction
A calendar sticker comes with the dispenser, along with a marker that estimates the date to change (about 3 months after installation). But I guess it also depends on how unclean the water is. I wouldn't recommend using for longer than they recommend because seeing the buildup of sediments in the filter is scary!