The aim of this report card is to provide a transparent, timely, and geographically detailed assessment of 2018 Coastal Bays health. Coastal Bays health is defined as the progress of four water quality indicators (total nitrogen, total phosphorus, chlorophyll a, dissolved oxygen) and two biotic indicators (seagrass, hard clams) toward scientifically derived ecological thresholds or goals. The six indicators are combined into one overarching Coastal Bays Health Index, which is presented as the report card score. The Coastal Bays get "incompletes" for both seagrass and hard clams this year due to issues in collecting the data in 2018.