Hydrocarbon, trace gas, and meteorology data are input into the Langley Research Center (LaRC) photochemical box model to study trends in photochemistry since the turn of the century. Emphasis is given on ozone formation mechanisms and efficiency, speciated hydrocarbon reactivity, and how these parameters vary diurnally, seasonally, and yearly. The measurement sites in this study are spread through the borders of the Houston Ship Channel, with Clinton Drive in the west, Deer Park in the south, and Channelview to the north. Individual reactive species are quantified through time and by source region to help identify key ingredients when the meteorological conditions are prime for ozone production. Results may suggest a remedy for poor ozone air quality days that still persist in the Houston area.