In　order　to　analyze　the　environmental　risk　of　reclaimed　wastewater,　based　on　the　monitored　results　of　nonylphenol　in　several　urban　lakes　from　various　supply　water　models　in　Beijing,　and　with　a　review　of　the　phenol　toxic　parameter　from　integrated　risk　information　system　of　the　Unite　State　Environmental　Protection　Agency　and　the　nonylphenol　toxic　tested　data　on　fish　from　interrelated　organizations　and　documents,　the　primary　fish　sex　transformation　risk　assessment　of　nonylphenol　was　conducted　by　using　the　criterion　of　risk　quotient　when　the　sewage　was　reclaimed　as　the　landscape　complementary　water.　The　results　indicate　that　the　risk　quotient　can　not　be　ignored,　and　some　measurements　should　be　taken　to　reduce　the　risk.　When　the　proportion　of　supplying　reclaimed　wastewater　for　urban　lakes　is　smaller　than　50%,　the　standard　of　nonylphenol　in　reclamation　wastewater　was　proposed　as　2　μg/L.