This morning I spent a few hours walking around downtown Westfield with my friend Mike Young of the Westfield River Watershed Association. We placed these labels next to storm drains to alert the public that things dumped in the drain go straight into the river.
It is just one of those things that we may not pay attention to. WRWA used to use a stencil and painted label, but now they use these rubber labels and adhere it with some black goo.
Here is a link for the EPA on the subject: