Welcome
This website displays Chicago River water quality data collected by the Sierra
Club Chicago Water Team. Read more about the program in the Resources page, and
view and download raw data in the Data page.
The map displays the most recent data for each site. Missing or old data is shown in grey.
Hover over the site on the map for more information.
Choose which water quality parameter to view in the colored bar above.
Click a site on the map to view historical water quality data.
When viewing historical data, click additional sites to add more data to the chart.
Click a site name in the graph legend to remove the site.
Highlight a section of the graph to zoom in.
