How safe is Seattle's water?
D017088:AIDS-Related Opportunistic Infections / Q000517:prevention & control*; D000818:Animals; D003457:Cryptosporidiosis / Q000517:prevention & control*; D003458:Cryptosporidium / Q000302:isolation & purification; D005374:Filtration; D006801:Humans; D018508:Water Purification / Q000379:methods; D014881:Water Supply / Q000592:standards*