In Mexico, industries discharge toxic substances into rivers and lagoons. 70% of the water has some level of pollution from all sources, in some cases due to hazardous chemicals. The most critical cases are
the Atoyac (between Puebla and Tlaxcala) and the Santiago (between Jalisco and Nayarit). However, this is a problem present in the whole country. The Mexican government only regulates 17 parameters regarding water discharges into rivers but recently, Greenpeace discovered an official report admitting that in Santiago River contains 1090 chemical substances in the river, including some hazardous substances which are used by the industry.