Testing omaru creek for- smell

I am going to find out what sort of smell of the water from omaru creek. I am going to test this by the smell that I think the culvert water was musty and rubbery foul. The resources and equipment that you will need is 4 emptied jars, 2 buckets, strings and 4 different sorts and kinds of water from omaru creek. I predict that the water has nasty green and yellow sorts of smell near the rubbery culvert. I think this because the culvert has bits of rubber and tar, body odour.