Monthly Archives: February 2015

Update, May 15: 44 percent of Washington state is in drought emergency condition From the department of ecology’s website: “24 of Washington’s river basins are in a declared drought emergency.” Some of our neighbors, who are on public water systems, … Continue reading →

We found the 5 gallon slow sand filter design to be inferior to the 55 gallon design. The five gallon filters just don’t work as well. They are less efficient at removing biological contamination at best; and actually introduce contamination … Continue reading →

When constructing a slow sand water filter, make sure the sand used is not contaminated. Make sure the sand source provides the correct type of sand. Running some chlorinated water through the filter before starting it running with unfiltered water … Continue reading →

Filters 1, 2, 3, 4, and 5 are still operating and producing clean water. The three pond filters are also still operating. Filter 1 was started in 2007. We are working on a pdf that has the most usefull information … Continue reading →