No | Sampling date | Monitoring sites | Description of the place |
1 | Feb. 2012 | Magomeni (Mapipa) | Junction of Kawawa and Morogoro roads, Urban area, many people, intensive traffic |
2 | Jun. 2013 | Posta, Askari Monument | Urban area, many people, intensive traffic |
3 | Jun. 2013 | Ubungo | Many people, intensive traffic, many vehicles (cars, big trucks, motorcycles and tricycles), power plants nearby, big bus station |
4 | Feb. 2012, Jun. 2013 | Kunduchi | Suburban area, housing, few vehicles, along the beach |
5 | Jun. (2014)-Jan. (2015) | Vijibweni | Suburban area, housing, few vehicles |
6 | Dec. 2013 to Dec. 2014 | Mwetemo village, Bagamoyo | Rural area, small scale farming, forest, very few vehicles |