Part 3: State Gasoline Quality Regulations in PADD 4 States

The next set of subsections provides detailed overviews of the relevant gasoline formulations in each PADD 4 state. One important prefatory statement is that many gasoline quality parameters show great uniformity from state to state, namely those set by the EPA and those that states faithfully adopt from ASTM D4814. Therefore, the discussion below will tend to focus on those remaining parameters that show the greatest state-to-state variability, namely: