We want to study the biogeography of microorganisms by taking water samples from domestic water heaters. Participants will acquire a water sample from their kitchen tap and answer 20 questions. The process will take ~30 minutes. We are recruiting 2-3 households per state. By looking at the genetic differences from isolates of similar microbes from across the globe, researchers are currently trying to understand the degree to which populations of microbes are isolated and whether this isolation suggests an allopatric speciation model for prokaryotes. We are still looking for participants in: AL, AK, DE, DC, KS, KY, ME, MA, NH, NM, ND, RI, SC, SD, TN, VT.