Region 1: WA, OR, MT, ID, WY Region 2: ND, SD, NE, KS, MN, IA, MO, WI, IL, IN, MI, OH, KY Region 3: VT, NH, ME, RI, NY, CT, MA, PA, NJ Region 4: CA, NV, UT, CO, AZ, NM Region 5: OK, TX, AR, LA Region 6: WV, MD, DE, DC, TN, VA, NC, SC, MS, AL, GA, FL