Category Archives: slow sand water filter study and construction

Filter 1 is still working, and is in the process of being tested again. We are running water through it and hope to be able to have a professional testing done soon. Another pond filter will be put together this … Continue reading →

It is now May 22, 2021. All the original slow sand  filters here are still functional. We have 9 slow sand filters running here. Four of them are pond filters. The latest pond filter is still being tested and no … Continue reading →

It’s now December 16, 2020 covid19 is still here and, consequently,  we still cannot have any tests done by commercial testing facilities. Thankfully, the horrific political situation in this country is somewhat calmed down and science will now be respected … Continue reading →

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 →