I remember something about a town that frequently reported a list of their most polluting local businesses. And the businesses started to become more environmentally friendly just to not appear on this list! There were no fines or other disadvantages, they just appeared on the list.
I'll add a link later if I can find something about it (wish me luck, it seems ogooglebar as Swedes might call it).
We've named and shamed China for a few years now that it produces 50% of the world's ocean plastic pollution from a single river. Little has changed.
As with most things, there is no silver bullet, but a combination of motivators will create the change we need. Independent data monitoring is the first major step to make it possible.
Good data would spell this out to the public and help "sell" the required policies to the people.
(I'm unsure why it should be in there and in what context but I have got the vague feeling that it is).