In order to encourage farmers to produce quality fruits and vegetables in an environmentally safe way, NCHU has been issuing certified seals of approval for products that test clean for pesticide residue. Consumers can now purchase these products with confidence at three different freeway rest stops across the island, in Tai'an Township in Miaoli, Qingshui Township in Taichung, and Gukeng Township in Yunlin.
為了鼓勵改採安全栽種方式、生產高優質產品的農民，只要產品通過興大檢驗無農藥殘留，即授予標章，提升消費者的信心，並自 2008 年開始與高速公路服務區合作，將這些「安全水果」送進國道沿線的泰安、清水、古坑 3 個點銷售。