Why not use EPA classification color map?

This would be a more explanative piece that explains why we are not using the EPA classification color map.

Influence of elevation on air quality?

• See landmarks (markers); see current location, which is a selected or searched location.
• Algorithm takes current location and fits an approximately east-west line through the current location and landmarks

Compare with bad air quality days?

This view is all about comparing to bad AQ days.

• Current location where same location for bad air days;
• landmarks with current AQ, compared to pas bad air days