In the past, it was felt “dilution is the solution to pollution.” If people got rid of it quickly enough and far enough away, it would no longer be a problem. In cities and towns, we focused on sewers to ferry and treat human or commercial waste. They used storm sewers for rainwater and snow. In all cases, they have designed convenient ways to ferry water into the nearest water body. Unfortunately, we have discovered that dilution is not the solution for stormwater and its pollutants