Category Archives: slow sand water filter study and construction

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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Slow sand water filters in freezing weather

This is an update on the condition of the filters running here with respect to the below freezing weather we have had here in Western Washington state the past two months. There was nearly 3 weeks (part of December and … Continue reading

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Rain water harvesting regulation

We get lots of political posts here, particularly people complaining about “big government” “trying to control rain water”. Please, keep in mind,  “we the people” are the “big government” “We” can change laws, peacefully. Secondly, there are no State governments … Continue reading

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Slow sand filter update

It is now January 27 of 2017. Its been cold this past 6 weeks: below freezing for 42 days with only 5 days where the temperature was in the upper 30s during the daytime. The ground remained frozen the entire 42 … Continue reading

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How long will a slow sand filter last ?

How long will a slow sand filter “run” before it needs “repair”? This is a good question. This blog has 8 years of posts documenting the slow sand filters running here. I can say with certainty that the longest running … Continue reading

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Rain water harvesting in Washington DC

According to one of our contributors, Kristan,  it is legal and encouraged in The District of Columbia to harvest rainwater. (see the most recent comment at the bottom of this page on our blog) They have extensive information on how … Continue reading

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Colorado legalizes rain water harvesting

The governor of Colorado has signed into law a bill that allows anyone to collect rainwater from their roof. It is now legal to collect rainwater in Colorado.  HB 16-1005 is the bill that was signed May 12, 2016.   … Continue reading

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Water molecules have now been shown to have a fourth “state of matter”

A recent article in “Science World Report” explains how scientists have found a new property of water molecules. A close examination of this information may give new clues as to how a slow sand water filter actually works on the … Continue reading

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An update on rain water harvesting in Colorado

Colorado appears to be coming around regarding their laws on rain water harvesting.  Its about time given the results of this study which shows that residential home owners catching rain in 55 gallon barrels does not adversely effect the amount of … Continue reading

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Urban runoff kills salmon

Update July 18, 2016: Please refer to the comment below by Nat. There is a link to the original study. Here is a very good reason to set up rain barrels, and slow sand filters. Urban runoff is killing salmon.  It has been … Continue reading

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