From the happy folks who discovered "restless leg syndrome" in order to have a diagnosis for which a drug already existed, we now get a new syndrome: "River Nose." This is a loosely defined cluster of symptoms experienced by those who windsurf or kiteboard on the Columbia River. Here is the article.
Sounds to me like people getting chilled in the frigid water and catching cold. I doubt that the Columbia River is more polluted than San Diego Bay.