and I've yet to see any evidence that suggests this is a harmful level. That level has been in place for decades. Arsenic in drinking water is a natural condition in several parts of the country. Take a look at the map in this article from the American Chemical Society. It shows large areas out West with arsenic problems. Many of those areas are arid and sparsely populated. I've drived across most of the Western states and live in Colorado. A regulation like this could kill a lot of small towns if no one considers cost verses benefit.

As for my problem, it seems to be over now. Not quite back 100% but definitely better than I was over the weekend. Bummer - it sucks to be sick, especially on a weekend with good flying weather!