The Water Bureau website has all the Bull Run water analysis online. The latest is from April 2014: https://www.portlandoregon.gov/water/article/494758 https:/

The Water Bureau website has all the Bull Run water analysis online. The latest is from April 2014: https://www.portlandoregon.gov/water/article/494758 https://www.portlandoregon.gov/water/article/494758 I used to check this more often, even before there was a WWW, when I was home-brewing beer. Then, as now, the water was so low in dissolved minerals, it was necessary to add Ca++, Mg++, etc. as yeast nutrients. All of Portland's big microbreweries probably still have do the same thing.