Please send monitoring data requests or questions to waterqualitydata@mwrd.org.
Ambient Water Quality Monitoring (AWQM) Program
AWQM Station Map (pdf)
AWQM Quality Assurance Project Plan (pdf)
Continuous Dissolved Oxygen Monitoring (CDOM) Program
CDOM Quality Assurance Project Plan
Biological Monitoring
Biological, Habitat, and Sediment Quality Reports
Fish Species Collected in the Chicago Area Waterway System
Illinois Waterway Monitoring Program
Illinois Waterways Station Table
Illinois Waterway Monitoring Project Quality Assurance Project Plan
Water Quality Data
2022 Waterway Ambient Water Quality
2021 Waterway Ambient Water Quality
2020 Waterway Ambient Water Quality
2019 Waterway Ambient Water Quality
2018 Waterway Ambient Water Quality
Water Quality Reports
Report 19-13 Post-Construction Monitoring Report for the Calumet Tunnel and Reservoir Plan System
Report 18-01 Guidelines for “Optimal” Withdrawal of Discretionary Diversion to and Operation of the Aeration Stations on the Chicago Area Waterway System
Report 16-34 2015 Annual Summary Report Water Quality Within the Waterway System of the Metropolitan Water Reclamation District of Greater Chicago
Sensitive Area Considerations
Report 18-09 Sensitive Area Considerations for Outfalls Designated in National Pollutant Discharge Elimination System Permit Number IL0028088 for the Terrence J. O’Brien Water Reclamation Plant
Report 16-17 Sensitive Area Considerations for Outfalls Designated in National Pollutant Discharge Elimination System Permit Number IL0028061 for the Calumet Water Reclamation Plant
Illinois Waterway Reports
Report 17-24 Water and Sediment Quality Along the Illinois Waterway From the Lockport Lock to the Peoria Lock Between 1977-2011 An Overview
Report 12-35 Water and Sediment Quality Along the Illinois Waterway From the Lockport Lock to the Peoria Lock During 2011
Report 11-42 Water and SedimentQuality Along the Illinois Waterway from the Lockport Lock to the Peoria Lock During 2010