Series of surveys for enteric viruses and indicator organisms in Tokyo Bay after an event of combined sewer overflow.
Combined sewer overflows (CSOs) have been recognised as one of the serious sources of pollution to the water environment during rain events, although field surveys to investigate the effect of their magnitude and duration on receiving waters have been very limited. The fates of enteric viruses (norovirus G1, G2, enteroviruses) and coliforms were determined in the wastewater treatment plant on a fine day and on a rainy day. Not all microorganisms were reduced in the primary treatment, but were reduced in the secondary treatment. Occurrences of enteric viruses and levels of coliforms were surveyed in the receiving coastal area after a CSO event, with the profiles of the enteric viruses in the coastal seawater being almost at the same positive ratio for 4 d after the CSO event.
Institute of Environmental Studies, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. katayama@env.t.u-tokyo.ac.jp
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Katayama
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Okuma
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Furumai
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Ohgaki
D003625:Data Collection; D004755:Enterobacteriaceae / Q000302:isolation & purification*; D004770:Enterovirus / Q000302:isolation & purification*; D004784:Environmental Monitoring; D007564:Japan; D029322:Norovirus / Q000302:isolation & purification*; D012722:Sewage / Q000382:microbiology*; D014865:Waste Disposal, Fluid; D014873:Water Pollutants / Q000032:analysis
D012722:Sewage; D014873:Water Pollutants