Sources
Every source cited on the guides and on the town, county and state pages, in one list. Quotations and state rules were checked against these sources on October 11, 2026. Storm reports cover 2016 through 2025; FEMA ratings are from the December 2025 release of the National Risk Index; utility territories are from 2024.
- Andy Felix, State Licensing for Tree Care Companies: Pros and Cons, TCI Magazine (November 7, 2025)
- Central Insurance, Tree Damage: Are You Insured?
- CSLB Industry Bulletin #23-07, new C-49 Tree and Palm classification (November 13, 2023)
- CSLB, AB 2622 implementation: minor work exemption raised to $1,000
- FEMA National Risk Index, December 2025 release
- Florida Statutes, section 163.045, tree pruning, trimming, or removal on residential property
- HomeGuide, Tree removal cost (read October 11, 2026)
- International Society of Arboriculture, Avoiding Tree and Utility Conflicts (2021)
- International Society of Arboriculture, Mature Tree Care (2021)
- International Society of Arboriculture, Recognizing Tree Risk (2021)
- International Society of Arboriculture, Storm-Related Tree Damage (2021)
- International Society of Arboriculture, Why Hire an Arborist? (2021)
- International Society of Arboriculture, Why Topping Hurts Trees
- Louisiana Department of Agriculture and Forestry, arborists
- Mark Russell, Misconceptions About Property-Insurance Coverage for Trees on Houses, TCI Magazine (October 1, 2021)
- Maryland Department of Natural Resources, Licensed Tree Experts
- NOAA National Centers for Environmental Information, Storm Events Database, 2016–2025
- NOAA NCEI, U.S. Climate Normals 1991–2020
- Oklahoma Insurance Department, Fallen Trees and Homeowners Insurance: What’s Covered?
- OSHA QuickCard, Tree Trimming and Removal (OSHA 3301)
- Texas Department of Insurance, Does your insurance apply when a tree falls? (February 2023)
- U.S. Census Bureau, American Community Survey 2019–2023 5-year estimates
- U.S. Energy Information Administration, Form EIA-861 service territories, 2024
- U.S. Environmental Protection Agency, Stormwater Discharges from Construction Activities