==How it Works==
[[Image:CeramicFilterPores.jpg|thumb|border|right|300px|Scanning Electron Microscope image of the pores in a 50/50 by volume clay-sawdust ceramic filter. The larger pores were likely left over from burnt off sawdust, while the smaller ones are likely pores between sintered clay crystals.]]
Ceramic clay filters work by filtering water through tiny pores small enough to stop many contaminants like clay, dirt, and possibly even bacteria. These pores are formed partially by the sawdust burning off during the firing process, and partially by the pores that form naturally in the clay due to the low firing temperature.
Most pathogens are attached to particles in the water, so removing these particles makes the water much safer to drink.
Clay pores alone would make an extremely slow filter, while a filter with too much sawdust would be ineffective and easily crushed. A mixture of 50/50 by volume and a firing temperature of 890 degrees creates an effective balance between speed, effectiveness, and durability.
== Dung fired clay pot filters ==