Sand & Gravel

Dec 18 2014
Dec. 16, 2014, marked the 40th anniversary of the Safe Drinking Water Act (SDWA), which today includes regulations for more than 90 contaminants...
peru_amazon_biosand_filtration
Sep 16 2013
In June 2012, a group of George Mason University (GMU) students and faculty traveled to the Amazon jungle to help an indigenous group of roughly 400...
pou_amazon_biosand filter
Jan 8 2013
A group of 400 native Peruvian Amazonians known as the Maijuna desperately searched for answers to help reduce their high child mortality rate when...
Dec 20 2001
The patented combination of slowsand with nanofiltration offers benefits that merit considerable discussion. This combination successfully was...