Category Archives: slow sand water filter study and construction

All of the original filters except one are still active and running. As of last month, this blog has been here for 12 years. All this time we have been studying and carefully observing the ability of naturally occurring processes … Continue reading →

All but one of the slow sand filters here are still working. All of the damage to the cistern has been repaired. Filter 1, which was started in 2007 and first tested in 2008 is still running. No  tests have … Continue reading →

As of August 26, 2019 most of the winter storm damage from last year’s snow and ice has been repaired. The cistern roof collapsed under  the weight of the snow. Pipes were broken and water contaminated. The repair work was … Continue reading →

It is now June 15, 2019; and this blog is approaching its 11th year on the net documenting our studies of slow sand filters. All but one of the filters are still running, including two of the pond filters. ( … Continue reading →

Here is a link to a video on YouTube of the first filter we set up (Filter 1). It was uploaded in 2007: https://www.youtube.com/watch?v=1ca6ZbZePBY Now the story of the video: In 2007, we uploaded a video of one of our … Continue reading →

Its now March 14, 2019. We have had the most severe winter in at least 60 years here in the foothills of the Pacific Northwest part of Washington state, in the U.S A. . We had 20 inches of snow … Continue reading →

It is now January 25, 2019. We are still working on the website. Nearly complete. We are also working on the filters. It froze here in November, and December, and we are working on repairing the filters. No serious damage. … Continue reading →

We are working on the website now and hope to have the work done in a few days. More updates will follow.

The oldest filter here was started in 2007. Its still running. The sand has not been changed since it was started, and it has not been wet harrowed for 9 years. The output water needs to be tested, but the … Continue reading →

According to some major news media outlets the latest “fad” is “raw water”.  If one reads the “news headlines” about this issue, it becomes evident that the facts are obfuscated behind the desire to sell news. Reading through the articles … Continue reading →