Category Archives: slow sand water filter study and construction

Update for 2019

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

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Slow sand filter update

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

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Slow sand filter video

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

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Slow sand filter update March 14, 2019

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

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Slow sand filter update

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

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website work

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

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slow sand filter update

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

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Raw Water: A new health trend?

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

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Slow sand filter update

It is now November 6, 2017. This summer was unusually hot and dry. Many forest fires in this state. Horrific air pollution from the fires. All electrical connections were disconnected for safety reasons. No recirculation of water through the filters … Continue reading

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Slow sand filter update

It is now April 16, 2017. All the filters are now running again after having been frozen solid this winter. ¬†Hopefully we will have the time and finances to do another water quality test on them. As soon as we … Continue reading

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