Unfiltered city tap water sludge

This is what unfiltered city tap water looks like:

A brief look at my water filtration 'overflow' tray.

Click to expand...

This is this build up from months of filtered water. When we drink tap water we are getting a small portion of this guck that is thought to be tolerated by our bodies. I do not believe our bodies are made to filter this type of contamination.
It looks like chocolate pudding.

Certain types of contamination our bodies can handle, but heavy metals such as mercury buildup in the system cause damage to our brains over time.

Looks like a whole lotta bacteria to me. Eww! Gross!