Bathymetry and Water-Quality Data of Surface Water Bodies in Cook County, Illinois, 2026

In 2026, the U.S. Geological Survey (USGS), in collaboration with the Cook County Bureau of Technology (BOT), carried out comprehensive hydrographic and water-quality surveys, and activity and disturbance assessments of 18 total water bodies 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 the BOT with resource management decisions and practices and 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 2026 for the following water bodies listed in alphabetical order: CCC Quarry, Colony Lake, Fabbrini Park Detention Area, Fabbrini Park Pond, Gray Farm Park Marsh, Hegewisch Marsh, Heritage Park Lake, Labuy Lake, Lake Irene, Lake Owens, Lake Terramere, LakeCook Property Pond, Prairie Park Lake, South Ridge Lake, Terada Park Lake, Unknown (UID A01120033 at Ron Beese Park, Barrington), Unknown (UID A07070013 at Bridges of Poplar Creek Golf Club, Hoffman Estates), and Unknown (UID A03220004 at Prospect Heights).