Hi, thanks for comment. I do not intend to add settings of any sorts. I want this mod remain as simple as possible, vanilla friendly.
About filtering rate, its always a question, there are mods that filter much more as well as much less.
Since pollution filtering is rather non essential issue in the game, I would tend not to have huge arrays of it.
What would your suggested rate of decrease would be? Now it is -96/m, which is circa 10 times of mining drill (10/m).