Register-Guard A report on pesticide levels in Oregon waterways shows detection of harmful chemicals monitored in Amazon Creek declined in frequency and concentration over two years. The Oregon’s Pesticide Stewardship Partnership 2017-19 biennium report showed improvement evidenced by lower concentrations and frequency of detection at 69% of the monitored locations in 10 waterways over the 2015-17 samplings. Frequency of detection and concentration in 14% of monitoring sites were largely unchanged, and about 17% of watersheds showed increases in those water quality measurements. Three Amazon Creek monitoring sites were shown to have improved and two sites showed no change, according to the report. "The trends, especially related to concentration, are going in the right direction," said Department of Environmental Quality Agency Toxics Coordinator Kevin Masterson.