A program to provide clean drinking water for indio villages in the region of Chiapas started in 2015, supported by the Mexican government.
In several small mountain villages, approx. 50 – 100 km around St. Christobal de las Casas, the Trunz water treatment systems were installed. Each village is home to approx. 100 – 300 inhabitants. The raw water source is fresh water from the mountains but likely contaminated with coliform bacteria.

Service and maintenance of the units is performed by a NGO-foundation. Therefore, a Trunz technican assisted/supervised the first installations and trained two people of the foundation in order that a know-how transfer is secured and the operation and maintenance of the units is working independently from Trunz in Switzerland.