The E.Z.N.A.® Water DNA kit is formulated to isolate high purity cellular DNA from water samples typically containing humic acid and inhibitors of PCR. This kit has been successfully used to isolate DNA from tough-to-lyse bacteria, fungi, and algae that inhabit a range of samples including tap water, lake, river and sewage samples. Isolated DNA can be used for most downstream applications including PCR, Southern blotting, SNP analysis.