The Colonia Miquel Hidalgo Project

Water in this small rural village of about 100 residents has good clarity but tested positive for fecal coliform. There is no cheap source of electricity in the village, but the well which serves the community has good water pressure during its four hours of daily operation. The SunRay solar pasteurization system selected for the village is the only commercially manufactured solar drinking water unit and is designed to provide up to 200 gallons per day of potable water. Experience with this unit will demonstrate the practicality of solar treatment in communities with no electricity.

Project report in PDF format available for download.


The Michoacan Project

The Safe Water International (SWI) Michoacan project in the Patzcuaro region of central Mexico is funded by a matching grant from the Rotary International Foundation and seeks to demonstrate alternative point-of-use drinking water treatment systems which can conceivably be mass-produced at a price affordable to poor families around the world.

Project report in PDF format available for download.


The La Cienega Project

Source water at La Cienega tested for moderate levels of fecal coliform and very high levels of turbidity (cloudiness). Availability of low-cost electricity in the village permitted a system design with a slow-sand filter feeding a UV lamp filter.



The sand filter is intended to address high turbidity levels and help assure that UV treatment operates successfully. UV lamp treatment is highly effective in disabling pathogens in drinking water, but its effectiveness is reduced when particles in the water block UV rays. The project’s two consulting engineers suggested a third filtration stage, an activated carbon canister, be added to assure the taste quality of the water.

Project report in PDF format available for download.


The Lake Patzcuaro Project

The Safe Water International (SWI) Lake Patzcuaro Schools project underway with potable water systems going into 30 primary schools in the region. Ground work started for 20 potable water systems in rural health clinics and 10 systems in indigenous Purepecha villages.