Multi-groups biological effect tests were applied to detect the biological toxicity of unconventional water source supply-type polluted surface water for the ecological risk,and the results were compared with that of the secondary effluent and reclaimed water.It is indicated that while the concentration coefficient reached 50,relative inhibitory rates of luminescent bacteria attained above 50%,the mortality rate of Daphnia magna and Oryzias latipes both attained 100% for the test river water.When the concen...