Hanjiang River, the second largest river in Guangdong Province, Southern China, is the
primary source of drinking water for the cities of Chaozhou and Shantou. Our previous
studies indicated that soils from an upstream catchment area of the Hanjiang River are
moderately contaminated with organochlorine pesticides (OCPs), which can easily enter the
river system via soil runoff. Therefore, OCPs, especially downstream drinking water sources,
may pose harmful health and environmental risks. On the basis of this hypothesis, we …