County deep-dive · snapshot 2026-05-11
Sonoma County
← All counties39,535
parcels scored
962k
acres covered
Moderate
dominant band
5%
acres in Elevated band or higher
Risk distribution
Acres by band
Single-county slice of the same risk classification used across the footprint. Acres are the load-bearing unit — a 1,000-acre orchard carries different exposure than a 1-acre rural lot.
Low
12k ac · 1.2%
Moderate
903k ac · 93.9%
Elevated
47k ac · 4.9%
High
0 ac · 0.0%
Severe
0 ac · 0.0%
What is grown
Top crop classes in Sonoma
Sourced from California Department of Water Resources Land IQ and the U.S. Department of Agriculture (USDA) Cropland Data Layer.
Annuals — low water (wheat, sorghum)
318k acres
Vineyards
190k acres
Annuals — medium water (tomatoes, melons, vegetables)
113k acres
Permanent — high water (almonds, walnuts, pistachios)
77k acres
Plus 246k acres classified as fallow or non-cropped — rangeland, dry-farmed acreage, and undeveloped agricultural parcels not in active production.