The Globe and Mail reports in its Thursday edition that Mexican regulators are examining whether Goldcorp broke any regulations in its handling of a leak of contaminated water at Mexico's biggest gold mine. A Reuters dispatch to The Globe reports that the move follows questions from Reuters about the leak, which until now has not been disclosed to the public. Levels of the mineral selenium rose in one groundwater monitoring well near Goldcorp's Penasquito mine as early as October, 2013. Goldcorp reported a rise in selenium levels in groundwater to the Mexican government in October, 2014, after which the contamination near its mine waste facility intensified. Two weeks ago, Goldcorp told Mexican regulators that contaminated water had also been found in other areas of its property. There is no evidence the leaks have endangered public health or caused environmental damage, Goldcorp and regulators say. Goldcorp said it has not informed villagers living near the mine because its tests showed the leak had not affected groundwater beyond its property line or contaminated the local drinking water. Goldcorp was not legally required to tell the community, Mexican regulators said.