Aluminum clocked in at an astonishing 540μg/L in rainwater collected in San Francisco on March 19th, 2016. Barium was also present at 39μg/L and strontium at 27μg/L.
Here’s the pdf of the full report:2016-03-19
Aluminum 540μg/L, barium 39μg/L & strontium 39μg/L in SF rain