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Take the sulfamethoxazole and metronidazole as two examples, exploring the spatial distribution of antibiotics in two drinking water sources, which are in Xin Licheng reservoir and Shitou Koumen reservoir, and evaluating ecological risk and human health risk. The average concentration of sulfamethoxazole and metronidazole which sampling in the sampling points of Xin Licheng reservoir are 0.05936цg/L and 0.05183цg/L, and that in the sampling points of Shitou Koumen reservoir are 0.03487цg/L and 0.04244цg/L. The concentration of antibiotics in Xin Licheng reservoir is more than that in Shitou Koumen reservoir, and concentration of antibiotics in aquaculture water is more than others. After calculating, the entropy of sulfamethoxazole and metronidazole is less than threshold, so the two kinds of antibiotics in two drinking water sources are no ecological and human health risks. Key word: antibiotic; drinking water source; ecological risk; human health risk

Human Health and Ecological Risk Assessment of Two Common Antibiotics in Drinking Source Water