3.D: Mississippi

Mississippi has only one gasoline quality standard, and it is a conventional gasoline. The state’s regulations adopt the most recent version of ASTM D4814 Standard Specification for Spark-Ignition Engine Fuel. The applicable federal parameters and limits are listed in Fig. 1 of Part 1 of this report, whereas the applicable, non-volatility-related ASTM D4814 parameters and limits are listed in Fig. 3 of Part 1 of this report.

Mississippi regulations allow for oxygenate blending: they do not, however, make any explicit mention of allowable 1-psi waivers. That said, they do define “gasoline-oxygenate blend” as any fuel conforming to Environmental Protection Agency’s (EPA) “substantially similar” rulings and waiver. This definition effectively incorporates the EPA’s current 1-p