This map displays three layers of ecological sensitivity across California. Fire
Hazard Severity Zones (FHSZ) reflect CAL FIRE’s official designation of wildland fire risk for State and Local Responsibility Areas, categorized as Moderate, High, and Very High.
Williamson Act enrolled land represents parcels under active agricultural conservation contracts with local governments, categorized by contract type including Prime farmland, Farmland Security Zones (FSZ), and land currently set for nonrenewal as of 2024.
Critical habitat boundaries reflect federally designated areas to the conservation of threatened and endangered species under the Endangered Species Act.
Citations:
CAL FIRE. (2023). Fire Hazard Severity Zones — State Responsibility Areas. California Department of Forestry and Fire Protection. CAL FIRE. (2025). Fire Hazard Severity Zones — Local Responsibility Areas, Phase 1–4. California Department of Forestry and Fire Protection. California Department of Conservation. (2024). Williamson Act Enrollment. Division of Land Resource Protection. U.S. Fish & Wildlife Service. (2024). Critical Habitat for Threatened and Endangered Species. Environmental Conservation Online System (ECOS).