Headlands Environmental

California environmental rules, by county

Every California county enforces its own environmental rules on top of state law. This directory summarizes the rules most likely to catch a project applicant off guard — county by county — and links through to each county's page.

58 California counties covered
77K projects filed for environmental review statewide

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Counties are listed by project-review activity — the counties with the most projects filed come first. Filter by name to jump to a specific county.

Los Angeles County 9,721,138 9.7K projects filed Kern County 900,000 6.2K projects filed San Diego County 3,298,799 4.5K projects filed Riverside County 2,458,395 3.7K projects filed Orange County 3,186,989 3.6K projects filed San Bernardino County 2,181,654 3.6K projects filed Sacramento County 1,585,055 3.4K projects filed Sonoma County 487,000 2.5K projects filed Placer County 433,822 2.1K projects filed Fresno County 1,000,000 2.0K projects filed Santa Clara County 1,936,259 1.8K projects filed Alameda County 1,682,353 1.7K projects filed Contra Costa County 1,165,927 1.6K projects filed San Joaquin County 780,000 1.6K projects filed Tulare County 470,000 1.5K projects filed San Luis Obispo County 282,424 1.5K projects filed Humboldt County 136,000 1.4K projects filed Mendocino County 90,000 1.3K projects filed San Mateo County 764,442 1.3K projects filed El Dorado County 195,000 1.3K projects filed Ventura County 843,843 1.1K projects filed Santa Cruz County 262,406 1.0K projects filed Santa Barbara County 448,229 968 projects filed Monterey County 435,000 933 projects filed Shasta County 180,000 927 projects filed Lake County 68,000 881 projects filed Marin County 260,000 837 projects filed Solano County 453,491 828 projects filed Napa County 138,019 827 projects filed Butte County 212,000 795 projects filed Stanislaus County 550,000 756 projects filed Siskiyou County 44,000 683 projects filed Yolo County 220,000 678 projects filed Trinity County 16,000 655 projects filed Nevada County 102,000 629 projects filed Merced County 280,000 594 projects filed Kings County 150,000 577 projects filed Mono County 14,000 569 projects filed Madera County 160,000 562 projects filed Imperial County 180,000 541 projects filed Tuolumne County 55,000 472 projects filed San Francisco County 827,526 458 projects filed Plumas County 19,000 407 projects filed Inyo County 19,000 377 projects filed Tehama County 65,000 376 projects filed Calaveras County 46,000 371 projects filed Yuba County 80,000 352 projects filed Sutter County 99,000 324 projects filed San Benito County 65,000 282 projects filed Amador County 40,000 270 projects filed Del Norte County 28,000 254 projects filed Lassen County 31,000 204 projects filed Modoc County 9,000 180 projects filed Colusa County 22,000 171 projects filed Mariposa County 17,000 160 projects filed Glenn County 29,000 137 projects filed Sierra County 3,200 123 projects filed Alpine County 1,200 91 projects filed

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Enter an address and get an instant environmental profile — protected species in range, local ordinances, and the review topics your project triggers. Includes data the county directory can't show without knowing the location.

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Source: Headlands Environmental — environmental site screening for California. County rules summarized from publicly available county codes and planning documents; project review counts indexed from the State Clearinghouse.