Water Quality MAP

In urban areas such as San Miguel de Allende, water quality in a particular location can change quickly and constantly, even sometimes on the scale of days. This is because urban areas tend to be served by many different wells, and local water authorities often mix water from different wells before it is sent to your tap. The way in which this water is mixed can be changed at any time, and this sometimes happens frequently. 

Given the insecurity of our water resources throughout the region, we recommend that everyone, regardless of their current water quality, takes steps to substitute their drinking and cooking water sources with safe and healthy alternatives, as outlined here.

For the best viewing experience, we recommend NOT using Safari to explore this map.
Chrome, Firefox, Explorer, Opera and Edge all offer excellent browser viewing experiences. Double-click or 'shift-click-drag' to zoom into certain regions.

This map is the culmination of years of water quality testing in rural well sites and urban taps. We are extremely thankful for the ongoing support from Texas A&M University, University of Guanajuato, Kansas State University, and of course, Northern Illinois University who started off this program. It also contains data collected from 2012 to 2019 by the National Water Commission (CONAGUA), of the Mexican federal government via their 'national water quality monitoring network'. This data, referred to as tested by CONAGUA on the map, makes up most of the data points outside of the state of Guanajuato and can be found here. We are also grateful to our community partners - CUVAPAS, SECOPA, and the San Cayetano Community Center. And a very special thanks to all of those who have invited us into their communities to muck around with your most valuable resource.

For more information on this work, please visit our Water Quality Monitoring page.