Very interestingly, the compounds we're looking at that are appearing in the environment entered the environment probably decades ago and are moving toward release into streams through slow groundwater movement. The problem is the legacy of the release so many years ago. I would say that most of our companies are very well regulated now and are very careful with many of their compounds and chemicals. It's the historical use of those chemicals that is now coming back to hit us.
In Canada we were always protected by our volume of water and the overall dilution that the systems would provide. But because we've been doing this for five to six decades, we're now at a stage that we're starting to see it arrive at public supply wells, in streams and rivers. Places that the rest of the world had to deal with decades ago are now happening in Canada, but it's a legacy problem of when these were released.