According to Wikipedia, the impact factor is a measure reflecting the average number of citations to articles published in scientific journals. It is frequently used as a proxy for the relative importance of a journal within its field, with journals with higher impact factors deemed to be more important than those with lower ones. The impact factor was devised by Eugene Garfield, the founder of the Institute for Scientific Information (ISI), now part of Thomson Reuters. Impact factors are calculated yearly for those journals that are indexed in Thomson Reuter’s Journal Citation Reports.
Mine Water and the Environment’s Impact Factor is
0.864 in 2015.