**Acknowledgements**

The authors gratefully acknowledge financial support from the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP, process 2008/58104-8), Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG, BPD 00512-13 and APQ-01537-14), and the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, 308174/2013-5). TN thanks FAPESP for fellowships supporting this research (Process 2011/18777-6). We would also like to thank CETESB (São Paulo State Environmental Agency) for the data they contrib‐ uted to this report.
