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Average 0730-1830 hr weekday PM2.5 concentrations at five core sites in Nairobi. The University of Nairobi site is included for reference but is not directly comparable due to different sampling parameters (RN= Ronald Ngala, RR= River Road, TM=Tom Mboya, TR=Thika Rd, KU= Kenyatta Univ., UN= Univ. of Nairobi).
