The chart shows two pairs of columns. One pair represent the decade of 2001 to 2010 and the other pair represent 2011 to 2020. The pair of columns cover the commodities of Hazardous Liquid and Gas Distribution. Within each column are bands of color which represent the number of serious incidences by OKI county. Except for Butler and Campbell counties, all other counties witnessed decreases over the last decade in Gas related serious incidences. Hamilton County was the only county that saw a slight increase in incidences involving Hazardous Liquid.