Drinking Water, Contaminants & Testing

We need air and water to continue living, – heck, we are 80% vibrating fluid!  I wish we lived in an Eden where we could drink from the water-cress filled brook, bubbling up from a natural spring in an un-polluted Earth!  With the current state of the environment, I think we have to filter the water coming out of the faucet.

I believe the best and most sustainable way to filter water is using ‘biochar’ or ‘activated carbon’ filters in a gravity-fed system, perhaps in combination with sand, like in the slow sand/biochar adsorber system (find info about it here).  If you want a more traditional convenient system, you might choose an under counter multi-stage system with refillable cartridges and housings.  If you want the absolute least maintenance possible and you don’t care about spending a lot of money on the equipment and energy needed to rn the equipment, you might choose a distiller.  And If you live in the city and want to remove fluoride and you don’t want to buy a distiller, choose a system that contains a biochar made from bones as your filter (read more about this here).  The typical biochar made from coconut shells will not remove fluoride.

If fluoride is not a problem, carbon filters made from any biomass could very well meet the need.  What is the need?  It is important that we all find out what contaminants are in our water (information on this below).  Only then can we choose an appropriate water purification method.  

To read about all water filtering system options, read this post.

When I began exploring water and water purification, I wondered if there was a way to filter water using natural materials and low-tech methods.  During my search, I found the CAWST organization’s biosand filter design.

I’ve been a huge fan of the CAWST organization, as their low-tech DIY filters can be built by anyone, in any country, and effectively filter out bacteria and other pathogenic organisms (microbiologicals); however the organization doesn’t necessarily focus on filtering out other contaminants, such as pharmaceutical drugs, agricultural pesticides, fungicides, herbicides, etc, fluoride, and heavy metals like aluminum and lead (corroding from the inside of the lead pipes bringing the water from the treatment plants or community well, to our faucets).  This led me to one of Josh Kearn’s talks on YouTube, which he explains how he takes the biosand filter, and expands the concept, to effectively filter out microbiologicals as well as heavy metals and other organic contaminants.

In his talk, Josh points out that biochar (cellulose materials, such as wood or coconut shells, ‘pyrolized’ or burned, at high temperatures such as 1652 degrees F in a low oxygen environment with low-tech, efficient and environmentally friendly gasifier drum ovens), has the ability to filter out difficult-to-remove contaminants in water, and the performance of this filtration appears to be comparable to commercially prepared activated carbon (AC).

Baseline Source Water & Typical Water Treatment Process

What’s in the water that we’re “starting with” – the source water / the influent?   In my case, the water is sourced from The Great Lakes in the Midwest United States – Lake Michigan.  If you are in an area that sources from a well, this next part will not necessarily apply to you.

List of water contaminants – pre-treatment/influent.

To get an idea of the treatment processes used to purify water in a typical city in the United States, see this diagram, which shows the following steps:

1. Ozone Disinfection
2. Flocculation (this is the step in which coagulants, aluminum or ferric (iron) salts, are used)
3. Sedimentation
4. Filtration (biologically active)
   1. 24″ anthracite coal
   2. 12″ crushed sand
5. Chlorine Disinfection
6. Fluoridation
7. Corrosion Control (phosphorous compound added to decrease corrosion of pipes, allegedly helps decrease amount of lead and copper leached)
8. Ammonia added to change the chlorine that was added in the Chlorine Disinfection step, into chloromine (chloromine reacts less with organic particles in the water – this reaction of chlorine with organic particles causes the creation of specific types of carcinogenic compounds) – but chloromine is harder to filter out))

List of water contaminants – post-treatment/effluent.

Contaminants

As you can see from the list of tracked contaminants in my city’s water sourced from Lake Michigan, the list of contaminants is INCREDIBLY LONG!

To read about solutions (water filters, etc) read the next post here.

It seems that regardless of my desire to live simply and without what seems like an endless list of manufactured gadgets and devices – the incredible level of pollution we’ve released into our environment and continue to release, requires that we not only treat water city-wide, but that we also treat the water when it comes out of the faucet in our home.   No substance we use remains contained in any system….it always finds its way into the air and water we all use.  This is a good reminder to strive toward natural materials found above ground or in shallowly dug pits, and the least processed, such as wood, stone, natural fibers, clay, and sand vs. metals and plastics.