43 datasets found
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City
Change Notice: Ward Precincts - 11/22/2024
City of Chicago —
Change to the units used in two columns. -
City
Change Notice: New ID in Employee Payroll Data (FMPS Payroll Costing) - 7/1/2025
City of Chicago —
Change in the values used for the EMPLOYEE DATASET ID column. -
City
Change Notice: Business Licenses - 2/20/2025
City of Chicago —
Addition of three geographic columns. -
City
Wastewater Surveillance Datasets - 3/7/2025
City of Chicago —
Improvement to wastewater surveillance datasets -
City
Change Notice: CDPH Environmental Datasets - 3/31/2025
City of Chicago —
Resumption of updates to the CDPH Environmental datasets and description of changes. -
City
Change Notice: Respiratory Virus Wastewater Surveillance Dataset - 1/29/2026
City of Chicago —
Upcoming change to the Respiratory Virus Wastewater Surveillance Dataset. -
City
Changes to CTA Ridership Datasets - 3/20/2026
City of Chicago —
Changes to CTA Ridership Datasets -
City
Violence Reduction Data Portal Visualizations Replaced by Violence Reduction Dashboard
City of Chicago —
Announcement of violence reduction data portal visualizations replaced by violence reduction dashboard launched in 2021. -
City
COVID-19 Vaccination New Age Groups - 6/9/2021
City of Chicago —
New age groups in COVID-19 vaccination datasets. -
City
Change Notice: Transportation Network Provider Data Updates - 12/12/2024
City of Chicago —
Change to how Transportation Network Provider datasets are updated. -
City
Change Notice: Building Permits - 10/15/2025
City of Chicago —
Added a PERMIT_CONDITION column. -
City
Change Notice: Business Licenses - 9/25/2025
City of Chicago —
Change to address display for a set of Business Activities. -
City
Fix: Employee Payroll Data (FMPS Payroll Costing) - 7/10/2025
City of Chicago —
Reload to correct some errors. -
City
Date Changes for COVID-19 Datasets - 6/10/2020
City of Chicago —
Announcement of date changes in the COVID-19 datasets. -
City
COVID-19 Emergency Department Visits Reporting Change - 6/23/2021
City of Chicago —
Announcement of Emergency Department Visits Reporting data change. -
City
New 311 Service Requests Dataset - 3/6/2019
City of Chicago —
Announcement of the first dataset from the new 311 system launched in December 2018. -
City
Divvy Datasets Live Again - 12/17/2019
City of Chicago —
Announcement of Divvy Datasets data change. -
City
Change Notice: Building Permits - 9/13/2024
City of Chicago —
Read about a temporary pause in updates and changes to the Building Permits dataset. -
City
How Chicago Protects Privacy in TNP and Taxi Open Data - 4/12/2019
City of Chicago —
Read about privacy protections in TNP and Taxi trip datasets. -
City
Previous Versions of Public Chauffeur and Public Passenger Vehicle Records - 8/8/2024
City of Chicago —
Explanation of the historical public chauffeur and public passenger vehicle datasets.
43 datasets found