Flag of Tequixquiac in the state of Mexico.
As per the source, it says that the green represents farmlands, white stands for peace, and blue for plenty of water and springs. In the center is the Tequixquiac glyph, with a diameter three-quarters the width of the white stripe, same as the flag of Mexico. 

The stripes &amp; ratio (4:7) also are equal to that of Mexico.
Own work; from https://www.crwflags.com/fotw/flags/mx-em-te.html
The flag can also be seen in:
File:Banderas Tequixquiac (1).jpg

and File:Banderas Tequixquiac (6).jpg
Flagvisioner