The Ministerio de Salud said that a committee has been set up to address the problem of arsenic in the drinking water in some Guanacaste communities.
The health agency also said that as a first step Kancham arsenic filters have been installed in some homes, as was recommended by the Pan American Health Organization. These are sand filters that can process a limited amount of water a day. The filter uses sand and pieces of metal to bind the arsenic.
The ministry is working with the Instituto Nacional de Acueductos y Alcantarillados, the Presidencia and affected municipalities.
The Sala IV constitutional court has taken up the efforts by residents to obtain water without arsenic.
The ministry said that the second stage is to find clean sources of water. This means more drilling and at a greater depth to avoid contamination by naturally occurring arsenic.
The ministry said that efforts already have reduced the presence of arsenic in the domestic water in Bagaces Centro and Cañas Centro, as well as Vergel and Jabilla de Cañas.
After years of inaction, Acueductos y Alcantarillados has taken to the television channels to promise clean water to all parts of the country.