1.   Also a major polluter is urban runoff, typically rainwater that may carry along untreated waste products from streets and yards.

2.   But most important for Neville, many residents were already aware of how urban runoff and toxins polluted Chesapeake Bay.

3.   Several coastal cities in Southern California most affected by urban runoff problems, including Los Angeles, are already regulated separately under the Clean Water Act.

4.   The additional water will come mostly from treated urban runoff, and it remains to be seen how successfully that water can be purified.

5.   The issues now are things like sewer overflow and urban runoff, water depletion and behavior modification.

6.   Health officials believe urban runoff in storm drains -- rather than a sewage leak -- may have caused the beach fouling.