Here's a round-up of links shared by Multnomah County on the topic of Air Quality:
Air Toxics: Questions and Answers
Stress and Worry, A Normal Response to Potential Environmental Exposures
OHA Cancer Incidence Evaluation Southeast Portland, 2009-2013
Laboratories Serving Oregon Soil, water, plant tissue and feed analysis
Complete video of community open house on air quality, Cleveland High School, 2_9_16
Complete video of community open house on air quality, Tubman School, 2_18_16
Chair Deborah Kafoury, Mayor Charlie Hales letter to Gov. Kate Brown
These sites have maps, and other documents that may help.
Oregon Health Authority Metals Emissions
Multco Air Quality: A community concern
Here's a link where you can find toxicology information on all the metals currently of concern in Portland (plus, a lot more!)
http://www.atsdr.cdc.gov/index.html
Also, links to videos from recent Community Forums on the topic in SE and North Portland:
and