The households table

One row per household in the region. All people in the region belong to exactly one household.

Column Name	Data Type	Description
household_id	integer	Unique identifier
grid_id	integer	Grid cell this household resides in; zero if currently not residing in a housing unit
persons	integer	Total number of people living in this household.
workers	integer	Total number of workers living in this household.
age_of_head	integer	Age of head of the household
income	integer	Income of this household
children	integer	Number of children living in this household
race_id	integer	Race of head of household
cars	integer	Number of cars in this household

• household_id must be unique and greater than zero
• grid_id must be a valid id in the gridcells table or zero
• persons must be greater than zero and less than or equal to absolute_max_household_size
• workers must be between zero and absolute_max_household_size
• age_of_head greater than zero and less than or equal to absolute_max_person_age
• income must be greater than zero and less than or equal to absolute_max_income
• children must be greater than or equal to zero and less than or equal to absolute_max_household_size
• race_id must be a valid id in the race_names table
• cars must be greater than or equal to zero and less than or equal to absolute_max_household_size
• The total number of households in a single grid cell should be no greater than that cell's residential units.