An important observation in our report was a significant correlation (almost 40%), between air quality and household income, meaning that populations in lower income neighbourhoods tend to be those subject to elevated levels of contaminant concentrations and therefore elevated levels of environmental health risk. Air quality worsened in line with decreasing income in a more significant way than any other factor. This is a clear demonstration of environmental inequity within the city.
In our analysis, lower income populations tended to be those living in more densely populated areas. So lower income communities have more people living together, correlating with observed increases of environmental health risk. These observations are compounding, meaning that the city is creating disproportionately higher health risks for marginalised populations in the city.