In 2022, the U.S. Geological Survey (USGS), in collaboration with the Cook County Bureau of Technology (BOT), carried out comprehensive hydrographic and water quality surveys, along with activity and disturbance assessments of 41 total water bodies encompassing lakes, rivers, and canals within Cook County, Illinois. These surveys and assessments describe the bathymetry, water-quality conditions, and on-site field crew observations and impressions for each water body and its surrounding catchment area. Data collected may assist BOT with resource management decisions and practices, as well as contribute to an inventory that can be shared with other local governmental agencies. Included in this data release are bathymetric, water quality, and observational findings gathered in 2022 for the following water bodies listed in alphabetical order: Axehead Lake, Baker's Lake, Belly Deep Slough, Bode Lake North, Bode Lake South, Bull Frog Lake, Busse Lake Main Pool, Busse Lake North Pool, Busse Lake South Pool, Busse Woods Reservoir, Consumers Quarry, Crabtree Lake, Doughnut Lake, Flatfoot Lake, Forge Quarry, Great Lakes Quarries East, Great Lakes Quarries West, Green Lake, Horsetail Lake, Icebox Quarry, Lake Arlington, Lake Arrowhead, Lake Charlemagne, Lake Opeka, Maple Lake, Midlothian Reservoir East, Midlothian Reservoir West, Papoose Lake, Powderhorn Lake South, Sag Quarry West, Saganashkee Slough, Sauk Lake, Vollmer Road Wildlife Pond East, Vollmer Road Wildlife Pond Middle, Vollmer Road Wildlife Pond West, Wampum Lake, Westbury Park Lake, Wolf Lake Pond 1, Wolf Lake Pond 2, Wolf Lake Pond 3, Wolf Lake Pond 4, and Wolf Lake Pond 8. First posted July 17, 2023, ver. 1.0 Revised January 17, 2025, ver. 2.0