"Point source waste is perhaps the easiest type of pollution to deal with. By point source I mean a waste that comes from one particular location. You can apply modern technology to that waste and clean it up. We've done a pretty good job of that, but we still have a long ways to go with regard to non-point source waste.
"By non-point, I would mean runoff from the land. This is a much more complex problem where you're talking about having to modify land use, trying to use best management practices on the land to try to reduce the inputs of things like silt, runoff of fertilizers and so on. We have quite a ways to go there yet. Over the last say 25 years or so there's been about a 30% improvement at the mouth of the Minnesota River where that flows into the Mississippi River. So you can see that 30% is nice, but we have quite a ways to go.
"The other thing, too, about point source is that we have to be vigilant and stay on top of the increased flows that come from, say sewage treatment facilities, as the population increases. For instance, the seven county metro area keeps growing in population and as it grows in population more waste gets to the sewage treatment facilities. So we have to make continued investments in maintaining and improving those facilities if we're going to be able to have the water quality that's needed for good fish populations and for good wildlife populations and good conditions for aquatic recreation."