Monthly water quality index at active sampling sites. The Water Quality Index, or WQI, is a number ranging from 1 to 100; a higher number indicates better water quality. In general, stations scoring 80 and above met expectations for water quality and are of lowest concern, scores 40 to 80 indicate moderate concern, and water quality at stations with scores below 40 did not meet expectations and are of highest concern. Data is available from https://ecology.wa.gov/Research-Data/Monitoring-assessment/River-stream-monitoring/Water-quality-monitoring/Using-river-stream-water-quality-data

Tags: environment