Well it used to work and the guys that ran it were real proud of it. I went out there in 2007 and they gave me a tour. I hear it only operated for 3 years and I can only assume the Cihuatlan administration changed and decided to not fund the upkeep. Could have been a few of the machines broke and expensive to fix but the pump that pumps black water out there is still working full time. Problem is you combine that mess with the high water table issue and you have some real health concerns for anyone living in the area. This water mixed with an abundance of surface ground water mostly heads for Laguna de Tules but it's probably in well water and it crosses the main road into Pinal Villa in 3 places.
2007 waste treatment plant
2015 waste treatment plant
It smells really bad
The State requires any town over 2500 pop to treat waste water but the date to comply was in 2010 and they want a plant like that in the fotos but it's expensive to build and maintain. El Grullo decided to go with an artificial lagoon which is much cheaper and very little upkeep. Some group here is trying to get a tour and technical explanation of how it works in El Grullo. Something has to be done