• Urban: Contiguous urban census tracts with a population of 50,000 or greater. Urban census tracts are tracts where at least 10 percent of the tract's land areas is designated as urban by the Census Bureau using the 2020 urbanized area criteria.
• Rural Center: Contiguous urban census tracts with a population of less than 50,000. Urban census tracts are tracts where at least 10 percent of the tract's land area is designated as urban by the Census Bureau using the 2020 urbanized area criteria.
• Rural: Census tracts where less than 10 percent of the tract's land area is designated as urban by the Census Bureau using the 2020 urbanized area criteria.
• Disadvantaged Community (DAC): Census tracts that score within the top 25th percentile of the Office of Environmental Health Hazards Assessment’s California Communities Environmental Health Screening Tool (CalEnviroScreen) 4.0 scores, as well as areas of high pollution and low population, such as ports.
• Low-income Community (LIC): Census tracts with median household incomes at or below 80 percent of the statewide median income or with median household incomes at or below the threshold designated as low income by the Department of Housing and Community Development’s list of state income limits adopted pursuant to Section 50093 of the California Health and Safety Code.
• Middle-income Community (MIC): Census tracts with median household incomes between 80 to 120 percent of the statewide median income, or with median household incomes between the threshold designated as low- and moderate-income by the Department of Housing and Community Development’s list of state income limits adopted pursuant to section 50093 of the California Health and Safety Code. 
• High-income Community (HIC): Census tracts with median household income at or above 120 percent of the statewide median income or with median household incomes at or above the threshold designated as moderate-income by the Department of Housing and Community Development’s list of state income limits adopted pursuant to section 50093 of the California Health and Safety Code.

Data Dictionary:

• ObjectID1_: Unique ID
• Shape: Geometric form of the feature
• STATEFP: State FIPS Code
• COUNTYFP: County FIPS Code
• COUNTY: County Name
• Tract: Census Tract ID
• Population_2019_5YR: Population from the American Community Survey 2019 5-Year Estimates
• Pop_dens: Census tract designation as Urban, Rural Center, or Rural
• DAC: Census tract designation as Disadvantaged or not (DAC or Not DAC)
• Income_Group: Census tract designation as Low-, Middle-, or High-income Community (LIC, MIC, or HIC)
• Priority_pop: Census tract designation as Low-income and/or Disadvantaged or not (LIC and/or DAC, or Not LIC and/or DAC)
• Shape_Length: Census tract shape area (square meters)
• Shape_Area: Census tract shape length (square meters)

• Urban, rural center, and rural designations are from the 2026 Senate Bill (SB) 1000 Assessment
• Disadvantaged community designations are from the California Environmental Protection Agency (CalEPA) under Senate Bill (SB) 535
• Low-income community designations are from the California Air Resources Board under Assembly Bill (AB) 1550. Middle- and high-income designations are from the SB 1000 Assessments.