"A new pesticide study detected trace levels of altrazine in four streams sampled along the Hamakua Coast. The chemical, considered a restricted-use pesticide, was more commonly used during the sugar plantation days. The samples were taken at the Kapehu, Alia, Makea and Honolii streams as part of the statewide pesticide sampling project, conducted by state departments of health and agriculture. Samples also were taken from coastal areas near the Hualalai and Waikoloa resort areas in West Hawaii. Trace amounts of pesticides were detected in water samples at those locations."