What could leak from Left Rear wheel?

[sasha055]

Hi,

I noticed a leak from left rear wheel in the last 2 days.

It's right in front of left rear wheel.. and it doesn't smell like coolant.
It doesn't look like oil it's more like water that washed an oily engine..

I did a search and it seems that coolant leaks are usually on the right or middle, oil leaks also should be in the middle.

Any iddeas on what could leak from left rear wheel? what fluids are going through there?

Thanks
Sasha