This is my local tap water from my kitchen sink, a place that is near the end of my water line in my house - I have NOT changed the screen in this faucet in some time. Cultured in nutrient agar on 5/14/09, photographed on 6/1/09 @100x, represents 2 weeks growth.
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** This Petri Dish contains 2 biofilms, the light mustard yellow one *that I have described before and also the light pearl colored one. Most all objects you see are INSIDE of biofilms.
I am thinking that I need to start using a different culture medium.