Figure 3.4: Percentage of measured one-hour and 24-hour average NO₂ concentrations within air quality categories in Hamilton

Text description of figure

There are two charts showing one-hour and 24-hour concentrations of NO₂ in 1998 and 1999 in Hamilton. Concentrations were higher in 1998 than 1999, with the majority of 24 hour concentrations being “Good”, and the majority of one-hour concentrations being “Excellent”.