MognaMogna is a town in the Jáchal Department, San Juan Province, Argentina. It is located on the right bank of the Jáchal River, at an altitude of 734 meters above the sea level. In the year 2010, the town had a total population of 114.ClimateMogna has a Hot Desert Climate. It sees the least amount of precipitation in June and July, with 7 mm of average rainfall; and the most precipitation in January, with 52 mm of average rainfall.Environmental issueAs a result of mining, the water of the Jáchal River has been contaminated with several metal minerals like Arsenic, Mercury and Magnesium, as well as spills from mining companies.