An official website of the City of Chicago

The .gov means it's official

Municipal government websites often end in .gov or .org. Before sharing sensitive information, make sure you're on a City of Chicago government site.

The site is secure.

The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Get the new, updated COVID-19 and flu vaccines. They're safe, effective, and can be taken together. Learn more at Chicago.gov/COVIDVax.

Comprehensive Chemical Analysis

This report is published quarterly.

Please note that occasionally additional time is required to compile and verify the data, from the previous three months that comprise the individual reports.

Laboratory Accreditation Number : 100228

Supporting Information Facts

Department:

People We Serve:

Programs & Initiatives:

Education

I Want To

Check Status Of

Sign up for/Volunteer