Foreign Policy Analyst • GIS Mapping Specialist • Bookseller • Freelance Writer & Photographer


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Wednesday 28 March 2018

Ozone Concentration, California

The above map was created by Mwahaki King on April 13, 2016, using ArcGIS Interpolation Tools to demonstrate ozone concentration in California and areas of concern. The most recent data available to the cartographer at the time of the map's creation was from the year 2007. The California data was provided by the California State GIS Department. The ozone dataset was provided by the California Air Resources Board and represents the concentration of ozone measured on September 6, 2007 between 3:00PM - 4:00PM in parts per million (ppm). 

From the ozone point samples (measurements), Mwahaki King produced a continuous surface predicting the value of ozone concentration for every location in the state of California. Often, it is not the actual values of a certain critical health risk that are of concern, but rather whether the values are above a certain toxic level. If this occurs, immediate action should be taken.

For this project, the critical threshold was determined to be any ozone value above 0.09ppm as this is California State's ambient air quality standard for hourly measurements. Any location with an ozone concentrate above 0.09 should be closely monitored.

Data Sources:
California Air Resources Board
California State GIS Department
ESRI Data Maps