| Zones |
| Zone | States/Counties/Cities |
| Central | Alpine, Amador, Calaveras, El Dorado, Fresno, Inyo, Kern, Kings, Madera, Mariposa, Merced, Mono, Napa, Nevada, Placer, Sacramento, San Joaquin, San Luis Obispo*, Solano, Stanislaus, Sutter, Tulare, Tuolumne, Yolo, & Yuba Counties in California and the following zip codes in Santa Barbara County, CA - 93429, 93434, 93454, 93455, 93456, 93457, and 93458*. |
| Coastal | Santa Barbara* (other than those regions of Santa Barbara County noted above in Central CA Zone), Los Angeles & Ventura Counties in California |
| Midwest | Illinois, Indiana, Iowa, Kansas, Kentucky, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, Wisconsin |
| Mountain | Arizona, Colorado, Nevada, New Mexico, Utah |
| Northeast | Connecticut, Delaware, District of Columbia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, Virginia, West Virginia |
| Pacific | Alameda, Butte, Colusa, Contra Costa, Del Norte, Glenn, Humboldt, Lake, Lassen, Marin, Mendocino, Modoc, Monterey, Plumas, San Benito, San Francisco, San Mateo, Santa Clara, Santa Cruz, Shasta, Sierra, Siskiyou, Sonoma, Tehama, and Trinity in California. |
| Pacific Northwest & Hawaii | Alaska, Hawaii, Idaho, Montana, Oregon, Washington and Wyoming. |
| Pacific Southwest | San Diego & Imperial Counties in San Diego |
| Southeast | Alabama, Florida, Georgia, Mississippi, North Carolina, South Carolina, Tennessee |
| Southern Pacific | Orange, Riverside, & San Bernardino Counties in California |
| Southwest | Arkansas, Louisiana, Oklahoma, & Texas |
