Rainwater collected in San Francisco on March 21st, 2016 tested positive for barium at 6.7μg/L. Other metals were at levels below reporting limits. Here’s the pdf of the full report: 2016-03-21 One Comment Ethics …Does the medical oath to help even exist any more?How many doctors have seen these rain water tests? Reply Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Notify me of follow-up comments by email. Notify me of new posts by email.