Water filters for developing nations Previous Gallery Next Gallery 1 / 10 JASON GETZ / email@example.com Tracy Hawkins co-founded a nonprofit that relies on simple pottery techniques to bring water filters to developing nations at a cost of $30 apiece. 2 / 10 JASON GETZ / firstname.lastname@example.org This is a cross section of a ceramic filter showing a black layer of carbon created during the firing process. 3 / 10 Filter Pure Inc. Here's how the filters are created. Factory Operations Manager Mesiaki Kimirei molds clay into the shape for the water filters at Safe Water Ceramics of East Africa, in Nguelelo, Tanzania. 4 / 10 Filter Pure Inc. Kimirei builds a second kiln at the ceramics filter factory. The kiln is heated with wood and propane gas to harden, or "fire" the filter. A completed kiln is behind him, made of brick and iron, and insulated with mud and straw. 5 / 10 Filter Pure Inc. Once pressed, the filters dry on racks before they are fired in the kiln. 6 / 10 Filter Pure Inc. Filters that have already been fired sit on the racks next to filters waiting to go in the kiln. 7 / 10 Filter Pure Inc. Omari Kimirei processes sawdust. When the clay filter is fired, the sawdust is burned out leaving a network of micropores in the clay, which traps bacteria and parasites. 8 / 10 Filter Pure Inc. Mesiaki Kimirei works on the clay mixer. 9 / 10 Filter Pure Inc. Omari Kimirei sharpens a blade for the hammermill, which mixes the clay and sawdust used to make the filters. 10 / 10 Filter Pure Inc. Mesiaki Kimirei and Omari Kimirei work on the hammermill. Sign up for e-newsletters Want more news? Sign up for free e-newsletters to get more of AJC delivered to your inbox.