The Insurance Services Office (ISO) reviews the firefighting capabilities of individual communities. ISO ratings are based on the Fire Suppression Rating Schedule manual. Districts and communities are graded on a numerical grading scale called a Public Protection Classification. The better the rating, the better fire insurance rates are for county residents.
North Valley: (district 30, 31 and 35)
ISO rating of 4
South Valley: (district 32, 33, 34 and 38)
ISO rating of 4 / 9
East Mountains: (district 40, 41, 43 and 46)
ISO rating of 5 / 9