Naolinco is a municipality of the State of Veracruz, it is located at Latitude 19º 39 ', Longitude 96º 52', with an altidud of 1540 m. S. N. M. In the Capital Region of the State of Veracruz. It limits to the north with the municipalities of Acatlán, Miahuatlán and Tonayán. To the south with the municipalities of Actopan, Emiliano Zapata and Xalapa. To the east with the municipalities of Alto Lucero de Gutiérrez Barrios and Tepetlán. To the west with Coacoatzintla and with the municipality of Jilotepec. It has an area of 108.8 km², which represents 0.2% of the state territory. Its climate is temperate-humid-regular, with an annual average temperature of 16º C.
With abundant rains in summer and early autumn with less intensity in winter. Naolinco is a word of Nahuatl origin that comes from the words "Nahui" four,"ollin" movement either from the earth or celestial level and "Co" is an indicative of locality or site, so it has been interpreted as "the place of the four movements of the sun ", but analyzing the words we find that it is only the" place of the four movements ". As in other regions of the country and the region. Water pollution is a great problem that affects the inhabitants of the area. In Naolinco there are numerous cases of people who have come to suffer from congenital diseases as well as alterations to health linked to cancer.
In the same way, a large number of inhabitants burn waste and waste, affecting air quality, generating even more pollution problems with health consequences. The lack of drinking water and environmental education is a situation that generates serious problems for the inhabitants of the municipality.