If you find that the investigation or prosecution wasn't successful, try to have the dump cleaned up. This way, subsequent dumping will be easier to define and identify. Sooner or later, the law will catch up with the dumper. And if more people like you are involved, and stay involved, that will happen sooner.

By all means, don't get discouraged. Every time someone appears in court or is questioned by an enforcement agent, they get the message that littering and dumping are illegal and that someone is watching. This may be enough to change some individuals' behavior.

Also see:

Table of Agencies

Why Contact an Agency?

Who to Contact

How to Approach an Agency

How Collected Penalties are Used

Other Enforcement Topics:

The Problem

The Harm

What to do if You Witness Someone Littering or Dumping Trash

What to do if You Find a Dump

The Laws

Beyond Enforcement...Other Ways to Help