It's true,our Urban run-off is too toxic for the ecosystem and the down stream effects are devastating to wildlife and our water.
Link to Walnut Creek Nutshell Article about using Bio-Swales as a solution for capturing Toxins in soil at the earliest possible point in our Water Cycle.
Link to Marine Mammal Center Articles:
1) LA Basin run-off images into Pacific Ocean
2) Details of health impacts to Marine Mammals
Links to several articles in LA Times and in this Blog