sanitation

God is pure

cleanliness is next to Godliness (god made dirt, and it really can hurt)
http://www.soap.com/

purity of soul
http://www.bahai.org/dir/sites
http://www.taoism.net/
http://www.sacred-texts.com/cfu/

purity of water : Got a keep 'em separated!
BVP in the SWF (without basic sanitation, bacteria viruses parasites get in the soil water food, and spread diarrhea, the second biggest killer of children in poor countries.)
http://ca.news.yahoo.com/s/capress/080320/health/health_un_toilets_1
http://news.yahoo.com/s/hsn/20080320/hl_hsn/cleaninguptheworldssanitation

ick factor
http://www.news.com.au/dailytelegraph/story/0,22049,23411217-5001021,00.html?from=public_rss

RAT could mean 'right and true'
Interestingly, throughout medieval Europe, it was official Catholic dogma that diseases were the wrath of god. This was before the germ theory of disease became the foundation of western medicine. Back in the day, then, God was a germ, it seems.