20250321 16033800 1.0 TRUE Dissolved Oxygen: Observed Concentrations (Lake Erie only) This data was extracted as part of the Overall Assessment of the State of Nearshore Waters. Dissolved oxygen (DO) is the amount of oxygen available to aquatic organisms. Concentrations of DO below acceptable levels can lead to hypoxic conditions (i.e. little to no oxygen) and have adverse impacts on aquatic species in the nearshore.ECCC PSNs were extracted within each Regional Unit, and dissolved oxygen concentrations were compared to Canadian Water Quality Guidelines for the Protection of Aquatic Life. Samples below the acceptable thresholds within each Regional Unit have been used to assign low, moderate or high stress. Data used is from 2012 and 2014 (most recent sampling years at time of assessment).Dissolved oxygen concentrations greater than 6 mg/L are considered to be acceptable; below 6mg/L isbelow the acceptable thresholds for aquatic life.ECCC stations are from the Great Lakes Water Quality Monitoring and Aquatic Ecosystem Health Data.Low Stress: All samples greater than 6 mg/L; Moderate Stress: One or more samples between 2 and 6 mg/L; High Stress: One or more samples <2 mg/L Environment and Climate Change Canada (ECCC) - Strategic Policy Branch - RDGO Environment and Climate Change Canada, Great Lakes Water Quality Monitoring and Surveillance Data: https://open.canada.ca/data/en/dataset/cfdafa0c-a644-47cc-ad54-460304facf2e Lake ERIE_WaterQuality_2000-present.csv