Handling Bilge water

[SVRocinante]

Good day folks

OK, so how does everyone deal with their automatic bilge pump?
I'm starting to get water in my bilge (have not tracked down the source yet, but that's a different story) and am very concerned about it pumping overboard for fear of any contaminant and the potential fines!

Before anyone goes off, I'm very environmentally conscious and would never deliberately dump contaminants overboard. I have a 3M pad under my engine, and have shoved some in around the bilge pump as well as a just in case.

When I look in the bilge their is no obvious oil or fuel in the water, but I'm also sure that there is no way it is 100% clean.

Am I just being paranoid?
Thougths?

No, not on my paranoia, on handling the bilge water!

Thanks again,