The　ecological　risks　of　nonylphenol　(NP)　and　tetrabromobisphenol　A　(TBBPA)　have　received　continued　attention　owing　to　their　large　consumption,　frequently　detection,　adverse　effects　on　the　reproductive　fitness,　and　lack　of　risk　assessment　technical　systems.　The　geometric　mean　of　the　median　concentrations　of　NP　in　the　22　surface　waters　was　0.278　mu　g/L,　and　TBBPA　in　the　seven　surface　waters　was　0.014　mu　g/L　in　China.　The　species　sensitivity　distribution　(SSD)　models　were　augmented　by　extrapolated　reproductive　toxicity　data　of　native　species　to　reduce　uncertainty.　The　SSD　models　and　the　hazardous　concentrations　for　5%　of　species　exhibited　good　robustness　and　reliability　using　the　bootstrap　method　and　minimum　sample　size　determination.　The　acute　and　reproductive　predicted　no-effect　concentrations　(PNECs)　were　derived　as　9.88　and　0.187　mu　g/L　for　NP,　and　56.6　and　0.0878　mu　g/　L　for　TBBPA,　respectively.　The　risk　quotients　indicated　that　11　of　22　locations　for　NP,　and　3　of　7　locations　for　TBBPA　were　at　high　ecological　risk　levels　based　on　the　reproductive　PNECs.　Furthermore,　the　higher　tier　ecological　risk　assessment　(ERA)　based　on　potential　affected　fraction　and　joint　probability　curves　indicated　that　the　ecological　risks　in　the　four　of　above　locations　needed　further　concern.　The　ERA　based　on　both　the　acute　and　reproductive　toxicity　is　essential　for　assessing　the　ecological　risks　of　NP　and　TBBPA,　otherwise　using　acute　PNECs　only　may　result　in　an　underestimation　of　ecological　risk.　The　developed　tiered　ERA　method　and　its　framework　can　provide　accurate,　detailed,　quantitative,　locally　applicable,　and　economically　technical　support　for　ERA　of　typical　endocrine-disrupting　chemicals　in　China.